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Miniature Flying Car Receives US Airspace Approval For Testing

An anonymous reader writes: The U.S. Federal Aviation Administration (FAA) has this month approved test flights for a one-tenth scale version of Terrafugia's flying car. The team behind TF-X, patented in 2011, will see the two-foot-long unmanned aircraft headed to the skies. The scale model is permitted to reach a maximum height of 121 meters, and a maximum speed of 100mph. While it is allowed to use U.S. air space, the team must be in constant communication with FAA authorities. The data collected during the special FAA-approved test runs will help Terrafugia plan the future development of design for its flying cars. The testing will also allow the engineers to assess the hovering capabilities of the drone.

95 comments

  1. Amazing by Deadstick · · Score: 4, Funny

    ...what can be done with CGI.

    I suppose the military version will have light sabers.

    1. Re:Amazing by Anonymous Coward · · Score: 1

      Apparently this company has cracked anti-gravity as well, given the design with it's tiny wings and rotors.

    2. Re:Amazing by meerling · · Score: 1

      As to the wings, it could simply be a lifting body. I don't know enough about aerodynamics to tell at a glance if that body shape qualifies as a lifting body, but such things do exist and have been used since at least the 50s in experimental aircraft.

    3. Re:Amazing by Anonymous Coward · · Score: 0

      It will be 3D printed, Luddite. Have you not noticed the game has changed? Have you not sensed the global shift in how everything is made these days?
      Don't you see the 3D printed houses popping up everywhere, with 3D printed cars in the garage?
      You haven't eaten 3D printed meals ???
      You simply send the jpeg of that CGI to the 3D printer and 3D printing occurs and that's all there is to it. Thus I have been assured by the knowledgeable engineers of Slashdot.

    4. Re:Amazing by GrumpySteen · · Score: 1

      I particularly liked the part where the propeller blades fold up and it still continues to fly.

    5. Re:Amazing by Sqr(twg) · · Score: 1

      It would seem they compensate for the tiny rotors with very high rpm. Increadibly noisy, and creates enormous forces on the rotor blades, but theoretically possible. The video states that they need 1 MW of power for lift-off, and that the engine provides 0.2 MW (300 hp), so it would take 0.8 MW worth of batteries. They're probably lithium polymer, like in miniature helicopters.

  2. It's almost 2016... by lord_mike · · Score: 1

    ...and I'm still waiting for my flying car!!! Oh, wait!! :-P

    I've been curious about this thing for some time now. It' certainly not the flying car that we imagined one would look like, but something that can be both driven and flown would be very useful and versatile--fly to an airport close to your destination and then drive the rest of the way. You'd still look like you're driving a UFO on the highway, but so what? If they ever make a 4 seat version of this, I'm in! The price isn't too bad, too, IIRC considering what it can do... Certainly cheaper than a real plane, and it runs on regular gas and can be parked in your driveway instead of renting out a hangar!

    1. Re:It's almost 2016... by lord_mike · · Score: 1

      Oh wait... this is a different Terrafugia model than the one I knew about earlier. This one actually looks like a flying car should look like and has four seats! I'm definitely interested now! I believe that this also only requires an ultralight flying license to fly.Of course, it's only a model at this point, but this is definitely more what people expect from a flying car!!

    2. Re:It's almost 2016... by Anonymous Coward · · Score: 0

      Fuck the local airport... from my driveway to my parking spot at work... throw automatic-end-to-end-pilot... gimme gimme

    3. Re:It's almost 2016... by Deadstick · · Score: 2

      It' certainly not the flying car that we imagined one would look like,

      It's not a flying car period. It's a roadable airplane, and needs a trained pilot to fly it.

      The FAA cut Terrafugia some slack on the maximum permitted gross weight, which means the original design could be sold under "light sport aircraft" rules, but it would still require a pilot's license of some grade. More to the point, that airplane would require an exceptionally well-trained pilot, because a short-coupled machine like that will be a perfect bitch to handle. You might notice they haven't invited anyone from the aviation media to try it out.

      The price isn't too bad

      Ask them for a firm offer.

    4. Re:It's almost 2016... by GrumpySteen · · Score: 1

      You might notice they haven't invited anyone from the aviation media to try it out.

      "The team behind TF-X ... will see a two-foot version of its unmanned aircraft headed to the skies."

      If you can find someone from the aviation media who can fit in a two-foot model of the vehicle, perhaps the company will let them try it out.

    5. Re:It's almost 2016... by Deadstick · · Score: 1

      You're the second person who misread that paragraph. Look for the words "the original design". They refer to the TRANSITION, which has been demonstrated by the company test pilot for years, and still hasn't been flown by anyone else. The TF-X is the second fantasy by Terrafugia.

  3. Why did they need FAA's permission? by mi · · Score: 1

    Why does a company need government's permission to fly a 10:1 model of their future product? It is not like they are testing it in public or on animals...

    (And here is the link I submitted about the same thing earlier.)

    --
    In Soviet Washington the swamp drains you.
    1. Re:Why did they need FAA's permission? by Sleuth · · Score: 2

      Good question, maybe it's just because in this day of worrying about drones they wanted to be extra careful. They shouldn't have had any trouble under 400 ft, but 100mph can be an issue. It also depends on where they are located to do the testing. They mention that they must stay in contact with the FAA probably means they are close enough to an airport or area with controlled airspace. So they are probably just getting pre-approval to stay out of trouble and reduce the risks they will cause an incident with aircraft.

    2. Re:Why did they need FAA's permission? by mpthompson · · Score: 3, Insightful

      I suspect this company is announcing "FAA approval" to make it look as if the FAA backs their concept so they can raise more $$$. In reality, the FAA probably said "Pfffft. Sure, you can fly your toy models. Go wear yourself out. Next?"

    3. Re:Why did they need FAA's permission? by Gorobei · · Score: 1

      We have a winner. Congrats, sir!

    4. Re:Why did they need FAA's permission? by Deadstick · · Score: 3, Insightful

      I suspect this company is announcing "FAA approval" to make it look as if the FAA backs their concept

      Exactly what they did when the FAA granted them a waiver on the max gross weight rules for ultralights, so the original Terrafugia could be sold under those rules. They billed it as "FAA approves flying car". They've squeezed all the marketing juice out of that early model, and now they need something new.

      You won't get very far through their website before they offer you a chance to invest...

    5. Re:Why did they need FAA's permission? by Tough+Love · · Score: 1

      They've squeezed all the marketing juice out of that early model, and now they need something new.

      A new transfusion of capital.

      --
      When all you have is a hammer, every problem starts to look like a thumb.
    6. Re:Why did they need FAA's permission? by NicknameUnavailable · · Score: 1

      The FAA instituted a policy that all private drones have to be registered by February 2016.

    7. Re:Why did they need FAA's permission? by CaptQuark · · Score: 1

      Actually, the FAA is requiring all NEW remote control toys purchased starting tomorrow (21 Dec 2015) to be registered before their first flight or face huge penalties. Owners of previously purchased or built toys must be registered by 19 Feb 2016.

      Because failure to register an aircraft can result in civil penalties up to $27,500 and criminal penalties can include fines of up to $250,000 under 18 U.S.C. 3571 and/or imprisonment up to 3 years. 49 U.S.C. 46306, if approached by government officials it is cheaper to throw the transmitter in the bushes and walk away from the whole thing rather than get caught flying your unregistered toy in the park. https://www.federalregister.go...

      Under the strictest interpretation of the law, foam gliders, heavy Frisbees, and most box kites would also fall under this misguided registration effort. The FAA's interpretation: if it flies in the air, it falls under our control.

      --

    8. Re:Why did they need FAA's permission? by tompaulco · · Score: 1

      Why does a company need government's permission to fly a 10:1 model of their future product? It is not like they are testing it in public or on animals...

      (And here is the link I submitted about the same thing earlier.)

      Because selfish drone owners who believe they can do whatever they want ruined it for everyone. RC Airplane flying had been largely unregulated for 50 years because people acted responsibly. But drone owners don't think they have to be responsible. They can do whatever they want, fly anywhere they want, videotape whatever they want. Now because of their selfishness, everybody pays.

      --
      If you are not allowed to question your government then the government has answered your question.
    9. Re:Why did they need FAA's permission? by Anonymous Coward · · Score: 0

      Let me guess...

      Their facility is within X miles of an airport or something so they need permission...

      At this point all they have is an overhyped drone. Perhaps they need some kind of recognition to apply any knowledge towards future stuff.

      Like it matters, I can't justify a new $25k car, much less 10 or 20 times that :(

  4. Re:In a world smothered in CO2 by lord_mike · · Score: 1

    The video suggests that it is a gas/electric hybrid,

  5. Another product we don't need by Anonymous Coward · · Score: 0

    So its great this thing is finally going into testing. Now we will finally now who in the world actually needs on of these? I give no more then two tests before one crashes. What a waste of time.

  6. 1/10th scale - full size only 500lbs? by BenJeremy · · Score: 2

    So this is a 1/10th scale model, fine... but only 50lbs? Doesn't that mean the full size can only weigh 500lbs to match the flight characteristics of the model?

    Still seems very much like vaporware.

    1. Re:1/10th scale - full size only 500lbs? by Howitzer86 · · Score: 1

      "Flying cars" of this sort exist already, they just require a real pilot. The really interesting thing about the Terrafugia flying car is that it flies itself, so I imagine the challenge isn't so much the hardware as it is the software. If they can get that done right, "flying cars" could be made accessible to more people.

    2. Re:1/10th scale - full size only 500lbs? by FlyHelicopters · · Score: 2

      The energy required to lift a pound of weight and make it go somewhere is far more than most people give credit for.

      It takes 10 gallons of fuel per hour to make a light, 2 seat piston engine helicopter fly. It takes 16 gallons per hour to make a light, 4 seat piston engine helicopter fly.

      A Honda Civic weighs more than either aircraft.

      Using the latest in modern engines, you might cut those numbers in half, but you still aren't hauling anything or going very far, and you're burning a ton of fuel to do it.

    3. Re:1/10th scale - full size only 500lbs? by colinrichardday · · Score: 2

      Wouldn't it be 50,000 pounds (50 × 10 × 10 × 10)?

    4. Re:1/10th scale - full size only 500lbs? by umafuckit · · Score: 1

      "Flying cars" of this sort exist already, they just require a real pilot. The really interesting thing about the Terrafugia flying car is that it flies itself, so I imagine the challenge isn't so much the hardware as it is the software. If they can get that done right, "flying cars" could be made accessible to more people.

      The challenge is not the hardware?? Terrafugia looks like nothing like the three vehicles in your linked video: it looks like science fiction. No way is that thing ever leaving CGI-land with those stubby little wings and tiny props. What the hell is powering it "cruise mode" when the props fold away? Probably hot air...

    5. Re:1/10th scale - full size only 500lbs? by BenJeremy · · Score: 1

      That might be correct. It seems that scale model boat builders use the cube of the scale to calculate the displacement of their model boats versus the full size versions.

    6. Re:1/10th scale - full size only 500lbs? by the_bard17 · · Score: 2

      There's a ducted fan in the rear of the vehicle that appears to provide thrust during and after the transition to cruise.

    7. Re:1/10th scale - full size only 500lbs? by Bite+The+Pillow · · Score: 1

      Scaling up may mean additional support or different materials, and a production model will likely have more or fewer features.

      It's a test model to learn stuff with, IOW, so you can't extrapolate within an order of magnitude without knowing a lot more details.

    8. Re:1/10th scale - full size only 500lbs? by Bartles · · Score: 1

      It's a good thing this isn't a helicopter.

    9. Re:1/10th scale - full size only 500lbs? by tsqr · · Score: 1

      Wouldn't it be 50,000 pounds (50 × 10 × 10 × 10)?

      Yes, if everything in the model scales with the cube of length. But it probably wouldn't, through the use of lightweight material like carbon fiber for the structure and props and high-efficiency ironless electric motors. It's going to a daunting challenge, though, and extremely expensive, assuming it's possible at all. Hard to imagine this getting off the ground with a takeoff weight much over a couple of thousand pounds. And even if it can get off the ground and actually fly, reliability is going to be an issue in something a 1%-er can afford to buy.

    10. Re:1/10th scale - full size only 500lbs? by Deadstick · · Score: 1

      this isn't a helicopter.

      Watch the video.

    11. Re:1/10th scale - full size only 500lbs? by TimSSG · · Score: 1
      I am far from an expert, but, often weight does NOT go linear on models. I would guess the weight is any where from 10 to 1000 times more in the full size model. Tim S.

      So this is a 1/10th scale model, fine... but only 50lbs? Doesn't that mean the full size can only weigh 500lbs to match the flight characteristics of the model?

      Still seems very much like vaporware.

    12. Re:1/10th scale - full size only 500lbs? by FlyHelicopters · · Score: 2

      It's a good thing this isn't a helicopter.

      It doesn't matter what it is...

      Lifting one pound, one foot, takes X energy...

      Lifting 2,000lbs, 1,000ft, and moving that weight forward at 100mph, takes a whole lot of X energy...

      Airplanes use less energy than a helicopter does, but not nearly as much less as you'd think. A Cessna 172 (a new one) is about 2,500lbs, less than the weight of most cars, and it burns 9 gallons of fuel an hour, 7 if you know how to lean properly, to go 120 mph carrying 3 people and a few small bags, and it needs a runway.

      If you need to go straight up and down, that is even harder.

      Rest assured, I would LOVE to see flying cars, but until you solve the energy issue, they will remain pipedreams.

    13. Re:1/10th scale - full size only 500lbs? by Anonymous Coward · · Score: 0

      Yup. So you have a gasoline engine to run the car, electric rotors for lift, and a ducted fan engine all tucked into a single vehicle where light weight is absolutely crucial to it's success.

      After paying experimental aircraft prices for this thing(assuming it could ever work), the lucky buyers would have the privilege of owning would of the most obscenely bad handling vehicles in all three categories(rotary aircraft, fixed wing aircraft, and road vehicles)!

    14. Re:1/10th scale - full size only 500lbs? by tompaulco · · Score: 1

      So this is a 1/10th scale model, fine... but only 50lbs? Doesn't that mean the full size can only weigh 500lbs to match the flight characteristics of the model?

      Still seems very much like vaporware.

      Absolutely. The largest bird capable of flight is under 30 pounds. If you double it's size, there probably isn't any way you could make it fly unless you altered the materials. The same goes for scaling up miniatures like this. You can learn SOME things from it, but you can't learn whether it will actually work unless you already know how you are going to scale down the weight while retaining the strength.

      --
      If you are not allowed to question your government then the government has answered your question.
    15. Re:1/10th scale - full size only 500lbs? by RonTheHurler · · Score: 1

      Weight scales as the cube of the length, just like volume.

      So ten times the linear dimension would be 100 times the weight, or 5000 lbs. (for a solid anyway)

      The problem is, material strength and gravity don't scale that way.

    16. Re:1/10th scale - full size only 500lbs? by Bartles · · Score: 1

      Show me a car that gets 18mpg at 140 mph. 140mph is the cruise speed of 172's with the 180hp Lycoming.

    17. Re:1/10th scale - full size only 500lbs? by FlyHelicopters · · Score: 1

      While that is a fair point, the 172 also requires several thousand feet of runway to be useful.

      It also doesn't carry all that much, put a pair of 200lb people and a few bags into it and you're at max gross weight, it is more like a Ford Mustang, a 2+2 airplane. If you put 2 adults in the back and 2 kids in the back, you're not hauling much, or you have to down fuel.

      It also costs a third of a million dollars.

      A much better comparison would be a Robinson R-44, since it doesn't require a runway.

      120 MPG at 16 gallons per hour, and it costs half a million dollars.

      A mid-size crossover SUV going 70 MPH is burning about 3 gallons per hour, carries double the load of either, and costs $40,000.

      It isn't even remotely close and it won't be any time soon, so it really doesn't matter. :)

  7. can it glide? by Anonymous Coward · · Score: 0

    From the looks of the thing it doesn't appear to have much wing surface area for the weight. If one of those two prop pods gives out, is there anything to be done? I guess it does have a whole-craft parachute backup, but that seems a lot less desirable (and less controllable) than gliding into a field somewhere in a controlled manner as a Cessna might do upon engine failure.

    1. Re:can it glide? by Chris+Johnson · · Score: 2

      Not a chance. A flying car even as an RC model won't look anything like that, not even close.

      Wings, forget it: way way too small. Props? That size? No way. Stability on two rotors in those positions? Nope. And even if somehow you had something with engines that size that ran props that size and lifted a body that size which I don't think any engines or materials can do, no matter what they are it's depicted as not blasting the ground with unbearable prop wash. Think a Harrier jump jet, because the thrust sources are nowhere near as broad as those of say an Osprey.

      Nope nope nope. But it's nice to see people still love the idea of a flying car :)

    2. Re:can it glide? by Bartles · · Score: 1

      It only uses the prop pods during takeoff and landing. The wings and rear mounted ducted fan keep it flying during forward flight.

    3. Re:can it glide? by jcr · · Score: 2

      It has multiple motors in each pod, so losing one wouldn't take a prop out of service. Losing a prop blade, on the other hand...

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
  8. Cross winds and down drafts and bad weather oh my by Anonymous Coward · · Score: 0

    So with something that small with such a small wingspan how is it going to handle in non ideal conditions? My guess, not to well.

  9. two-foot-long, 121 meters, 100mph, by turkeydance · · Score: 1

    make up your mind!

    1. Re:two-foot-long, 121 meters, 100mph, by ColdWetDog · · Score: 1

      Oh stop. Here at Slashdot, we're trying our best to be inclusive.

      We confuse everybody.

      --
      Faster! Faster! Faster would be better!
  10. Rich persons toy at best.. by kheldan · · Score: 1

    ..government/military/emergency vehicle only, at worst. For safety purposes, you'd have to be a licensed pilot, with special training by the manufacturer and certified by the FAA, in order to operate it. How long did it take for the automated systems on current passenger jets to be certified? Will take at least that long to certify something like this is fail-safe enough. Maintenance would have to be performed with the same rules/laws as any other aircraft, i.e. you'd have to take it to a licensed aircraft mechanic; no home repair by amateurs allowed. They'd probably have to create a whole new class of insurance for the craft and the pilot, and it too wouldn't be cheap.

    This is all assuming something like this would ever go into actual production, and even in 'production' it'd be more or less hand-built, one at a time, to order.

    I can definitely see something like this being very useful in a military version, though, or as an emergency vehicle version (flying ambulance, for instance, better equipped for the job than a helicopter because it would need a smaller area for takeoff and landing). Not really practical for mass-production though; you could never make it affordable enough for even an upper-middle-class family, especially considering all the incidental expenses involved.

    --
    Are YOU using the TOOL, or is the TOOL using YOU? Think about it!
    1. Re:Rich persons toy at best.. by Tough+Love · · Score: 1

      I can definitely see something like this being very useful in a military version, though, or as an emergency vehicle version

      I suggest that you snap up some shares of Terrafugia while you still can!

      --
      When all you have is a hammer, every problem starts to look like a thumb.
  11. shades of the Osprey, oh my by 74Carlton · · Score: 2
  12. Bumper sticker by penguinoid · · Score: 1

    Does it come with a "Your horn will not transform my car into a helicopter" bumper sticker?

    --
    Don't waste your vote! Vote for whoever you want, unless you live in a swing state it won't matter anyways
  13. What?! by mridoni · · Score: 1

    Yes, great, but it's 2015, where's my flying car? Oh, wait...

  14. Finally! by Anonymous Coward · · Score: 0

    Someone threw their hat over the wall, gave up foot, and let the scientist and his friends have their way with them. All for the flying car.

  15. Re:In a world smothered in CO2 by Tough+Love · · Score: 1

    And it has magic morphing rearview mirrors, apparently based on a new quantum metamaterial, only stable in cyberspace.

    --
    When all you have is a hammer, every problem starts to look like a thumb.
  16. I can't hear you! by Anonymous Coward · · Score: 1

    Think about the primary reason you don't live at an airport. If flying cars ever "take off" like cell phones, your neighborhood will be an airport.

  17. Wing 10x length, 10x chord, 100x weight by raymorris · · Score: 1

    The full-size wing will be 10x as long, with 10x the chord, and the same curve, so it could be 100x the weight.

    Yes, it's also 10x as tall, but what matters for wings is the shape, the ratio of height to chord. A 1/10th model has 1/100th surface area so at the same shape it can support roughly 1/100th the weight.

    1. Re:Wing 10x length, 10x chord, 100x weight by Tough+Love · · Score: 1

      The full-size wing will be 10x as long, with 10x the chord, and the same curve, so it could be 100x the weight.

      No, 1000x, if not otherwise structurally altered.

      --
      When all you have is a hammer, every problem starts to look like a thumb.
    2. Re:Wing 10x length, 10x chord, 100x weight by Anonymous Coward · · Score: 0

      No...read the comment again. The wing would support around 100x the weight at full size. If the model is designed to support 50 pounds plus a standard safety margin, the finished product would support about 5000 pounds.

      We don't know the lifting power of the wing or the full-size product's weight, but one thing is certain: it's going to be much closer to 5000 pounds than 50,000...probably more than 40,000 pounds closer.

  18. WTF? by jcr · · Score: 1

    We're talking about a model airplane here, smaller than a lot of hobbyists are already flying on a routine basis. Why in the world would they even be talking to the FAA about it?

    -jcr

    --
    The only title of honor that a tyrant can grant is "Enemy of the State."
    1. Re:WTF? by Deadstick · · Score: 1

      Why in the world would they even be talking to the FAA about it?

      Well, it got them an article here, now didn't it?

    2. Re:WTF? by SeaFox · · Score: 1

      We're talking about a model airplane here, smaller than a lot of hobbyists are already flying on a routine basis. Why in the world would they even be talking to the FAA about it?

      Maybe they're getting a jump on the FAA's drone registration program, cause you know the Press calls every remote control aircraft a drone now.

  19. Comic relief by Tough+Love · · Score: 3, Interesting

    Thanks for that. A good laugh once a day makes you live longer. Amongst the innumerable aerodynamic engineering issues:

      - Center of gravity is well forward of center of lift, so the only possible stable flying attitude is straight down

      - Wing loading is off the end of the scale. If you put a big enough engine on it, anything will fly - this one would would stall somewhere over 300 Mph, if it could ever fly straight that is, which is doubtful. Too bad it's limited to 200 Mph, I guess it's a helicopter after all.

      - Vertical and horizontal stabilizers are miniscule and tucked away in the turbulence of the fuselage. Control surfaces are apparently nonexistent. To get an idea how that might work, tie a string to a shoe box and fly it as a kite while driving down the freeway.

      - How much will those retractable engine engine covers weigh, if they ever exist? Which they never will.

      - Where are the roof racks? It needs root racks. And a trailer hitch.

    For further research, see here.

    --
    When all you have is a hammer, every problem starts to look like a thumb.
    1. Re:Comic relief by Deadstick · · Score: 3, Insightful

      One more thing: Parking-lot dings are aircraft damage and get repaired at aircraft repair rates.

    2. Re:Comic relief by mcrbids · · Score: 1

      I've been following the development of the Transition with the hope of having one. Right as the Transition looked like it was actually going to be a thing that not only flew but might actually be sold at some point, they announced this turd bomb of the TF-X with it's magical properties.

      As soon as I saw the announcement, I was like WTF? From the description I wondered if it was going to be made of unicorn farts or faerie dust...

      My guess is that their flying car design was scooped by the far better looking and more ready AeroMobil and they panicked.

      --
      I have no problem with your religion until you decide it's reason to deprive others of the truth.
  20. Not sci-fi, fantasy by Anonymous Coward · · Score: 0

    You'd need anti-grav and reactionless thrusters for an acceptable flying car, which, afaict, is quite impossible.

  21. Moller by AndyKron · · Score: 1

    Where's the Moller Skycar?

  22. The full sized version will be flown next year by ozduo · · Score: 1

    On the 1st of April!

    --
    I got to the chocolate box before you, that's why the hard ones have teeth marks.
  23. Car breaks down = dead by Anonymous Coward · · Score: 0

    Car breaks down = dead.

    Accident = dead.

    yeah, this will work.

  24. Not at all true. by Brannon · · Score: 2

    The Transition is a STOL aircraft which does require a trained pilot.

    The TF-X is a VTOL aircraft and it is being designed around automated flight. They haven't invited anyone from the aviation media to try it out because it isn't ready yet. Ford hasn't invited any members of the automotive media to test-drive their 2020 vehicles yet, I guess that means they are impossible to drive.

    1. Re:Not at all true. by Deadstick · · Score: 1

      I was talking about the Transition. But to address your comparison, it fails on one small difference: 2020 Fords will go on sale. The TF-X, as shown in the video, will not.

      Of course, you're welcome to save this thread and throw it back in my face if either prophecy fails to come true. I promise to apologize.

      Meanwhile, the website will welcome your investment inquiry in the TF-X with open arms.

  25. What's the issue? by Brannon · · Score: 1

    Sure it costs money to go faster, but lots of people have money and are willing to spend it to go faster.

    1. Re:What's the issue? by Anonymous Coward · · Score: 0

      "lots of people have money"

      LOL on what planet?

    2. Re:What's the issue? by FlyHelicopters · · Score: 1

      Sure it costs money to go faster, but lots of people have money and are willing to spend it to go faster.

      Yep, but not enough of them to make flying cars a thing.

      It is not a financial problem, it is a physics problem.

  26. Based on your criteria, helicopters can't fly. by Brannon · · Score: 1

    They're actually building a prototype, so if it can't fly then we'll all find out soon.

    1. Re:Based on your criteria, helicopters can't fly. by ChrisMaple · · Score: 1

      Aircraft are subject to a cube-square law. The model might well fly, and the full size version stick to the ground as if glued.

      --
      Contribute to civilization: ari.aynrand.org/donate
    2. Re:Based on your criteria, helicopters can't fly. by Anonymous Coward · · Score: 0

      That's how I used to think! For some reason my 30 foot paper airplane is still crumpled up in the backyard though :(

  27. lift = pressure difference X wing area, not volume by raymorris · · Score: 1

    The way a wing works is that the (flat) underside of the wing has higher air pressure than the curved top side. The total lift is the pressure difference (in psi) times the area of wing underside, in square inches. Pressure multiplied by wing AREA, not wing VOLUME.

  28. What's going on? by Anonymous Coward · · Score: 0

    Where are all these Luddites coming from? I was assured 3D printing changed the game permanently, and since hard drives got better, anything is possible, right?

    Remember that computer you had in high school! Hahahaha! Obviously we'll be piloting our flying cars on Mars in no time.

  29. mixing units by Anonymous Coward · · Score: 0

    "The scale model is permitted to reach a maximum height of 121 meters, and a maximum speed of 100mph"
    That is a very slow viehecle. Or do OP mean km/h?

  30. My first thought by Anonymous Coward · · Score: 0

    I work for the emergency services. The amount of calls we get from SOS boxes as people have run out of fuel whilst travelling on a motorway having just passed a petrol station is unbelievable.

  31. Ever heard of Cessna, Cirrus? by Brannon · · Score: 1

    Flying cars aren't a replacement for cars, they are a better general aviation aircraft--one that in the future will pull more people into general aviation.

    1. Re:Ever heard of Cessna, Cirrus? by FlyHelicopters · · Score: 1

      They could triple the size of general aviation and it would still be very small.

      There are several reasons why this just isn't going to happen. One of which is that any means of lifting a vehicle creates a lot of down wash, so it doesn't work at people's homes. So you need something that works as a road vehicle first.

      Then you need to get that vehicle to someplace you CAN take off. Fair enough, you could have those areas setup, except all the problems with that idea, such as land use, how many takeoffs and landings per min/hour, etc.

      Something that sort of looks like a car and is certified as a vertical lift vehicle might happen... for perhaps twice the price of a Cessna 172.

      How big is the market for $600k flying car toys? Does it exist? Yes. Is it big? No, not really.

  32. I like regular cars. by Anonymous Coward · · Score: 0

    I like regular cars better. If the engine stops running, I'm already on the ground.

    1. Re:I like regular cars. by Anonymous Coward · · Score: 0

      never watched the Dukes of Hazard I'm guessing?

  33. Just wait by stoatwblr · · Score: 1

    until the first one gets dinged by a soccer mom in a supermarket carpark.

    The FAA is going to have its work cut out keeping these safe in the real world.

  34. No doors? by Anonymous Coward · · Score: 0

    And apparently no interior.

  35. So you admit that I'm right and you're wrong. by Brannon · · Score: 1

    You originally said that flying cars would never exist because physics, and then you pointed out a lot of economic & practical problems with replacing all cars with flying cars. I point out that they aren't a replacement for regular cars but rather a better GA aircraft, and now you admit that there is [in fact] a market for them--perhaps even one that is 3x larger than the existing GA market (which supports several companies, BTW), but we should all consider that a failure because there won't be one in every garage?

    It is truly fascinating how short-sighted aviation experts are. This is an industry which is ripe for disruption and I'm going to laugh my ass off in 20 years when I'm flying around in a ride-share self-piloting VTOL aircraft while you're staring at your dusty gauges and talking wistfully about the good old days.

    1. Re:So you admit that I'm right and you're wrong. by FlyHelicopters · · Score: 1

      You originally said that flying cars would never exist because physics

      I did? I don't think that was me...

      What I did say is that flying cars would never be common, would never be cheap, and would never be widespread.

      And if that is not what you read, or perhaps if I wrote it poorly, then that is what I meant to say.

      I point out that they aren't a replacement for regular cars but rather a better GA aircraft, and now you admit that there is [in fact] a market for them--perhaps even one that is 3x larger than the existing GA market (which supports several companies, BTW)

      I wish them all the best at becoming better GA aircraft, but that market is riddled with failures.

      As for supporting the existing GA market of companies, only Cessna and Cirrus have done anything with it, and neither company is getting rich off it. Many have come and gone, some keep in the market because of sunk costs, so why not.

      Look at the A36 Bonnanza for example... It is really expensive, they don't build that many of them, and it largely exists because it has existed for many years and the sunk costs are paid for. It would never make sense to develop it from scratch today.

      Likewise, the Cessna 172 exists because it is running on a very old type certificate with minor changes over the years. Cessna tried recently with the 162 light sport aircraft and discovered that doing an all new airplane was hard and expensive and now it is gone.

      So now they build 50 year old designs.

      Cirrus has a much more modern design, and after some teething troubles, seems to have survived the pain and come out to compete with Cessna. Good for them, but they still sell half a million dollar toys.

      but we should all consider that a failure because there won't be one in every garage?

      When people use the term "flying car", they generally are referring to something that the masses can own, that is easy to drive/fly and is cheaper than airplanes.

      My point isn't that it is a failure because there won't be one in every garage, but because there won't be any in ANY garages, unless those happen to be located at an airport or WAY out in the countryside.

    2. Re:So you admit that I'm right and you're wrong. by FlyHelicopters · · Score: 1

      I'm going to laugh my ass off in 20 years when I'm flying around in a ride-share self-piloting VTOL aircraft

      Hope and dreams are nice, but that simply isn't going to happen.

      Two points:

      1. There is little reason to make it VTOL, when it will end up being at an airport anyway. Assuming you make it self-piloting, it might as well be an airplane, which will always be cheaper than a VTOL anything.

      2. The cost of these things, by the time they end up as commercial products, are likely to be pushing a million dollars. It becomes a luxury toy for rich people, assuming anyone buys it. But such toys already exist, they are called helicopters and work just fine.

      It is truly fascinating how short-sighted aviation experts are.

      I'm not nearly as short-sighted as you think... I just understand the economics behind the problem.

      The Lycoming IO-360-L2A engine in the Cessna 172SP costs about $49,000 new. Rebuilt to factory new specs (with you providing a working, runout core), is $30,000.

      http://www.airpowerinc.com/pro...

      The reason for that cost has to do with volume, there just isn't any. They may do a few hundred such engines a year, they are largely hand built/machined, and have been certified for a very long time.

      For various reasons, you can't just take a car engine and put it in an aircraft. There are legal obstacles (consider the FAA just decided that all light drones over about half a pound had to be registered) to getting certification, then there are practical considerations, such as building in redundancy that doesn't exist in most car engines, such as dual spark plugs, dual power sources, etc.

      Then there is making the engine light enough to put on a small airplane.

      If it were easy, everyone would do it. A Cessna 172SP doesn't have to cost $400,000, if you could somehow build a million of them a year.

      But you can't. In fact, only about 50,000 of them have ever been made, in all forms and trims, over a 50 year period.

  36. 1970 is calling, they want their aircraft back. by Brannon · · Score: 1

    > 1. There is little reason to make it VTOL, when it will end up being at an airport anyway. Assuming you make it self-piloting, it might as well be an airplane, which will always be cheaper than a VTOL anything.

    HTOL makes sense for internal combustion engines because the engine is so heavy you don't want more than one of them if you can avoid it. And HTOL aircraft are easier to pilot by humans. But HTOL requires big [costly] wings to get sufficient lift and then you have all that drag at altitude. And if we were talking about a flying car for 1970 then you'd be exactly right, but we're talking about a flying car for 2035.

    VTOL makes sense for electric drive aircraft. You can use multiple redundant cheap electric motors rather than one highly reliable super-mega-certified internal combustion engine. VTOL has a trickier control loop, but that doesn't matter if a computer is doing all the flying. VTOL obviously has advantages for takeoffs and landings in denser areas, but also should lead to a cheaper airframe. I suspect VTOL makes more sense for our 2035 aircraft, but we'll see.

    1. Re:1970 is calling, they want their aircraft back. by FlyHelicopters · · Score: 1

      VTOL makes sense for electric drive aircraft. You can use multiple redundant cheap electric motors rather than one highly reliable super-mega-certified internal combustion engine.

      The drive and power systems don't matter, they aren't the primary issue. (they are an issue, but lets pretend that is magically solved)

      The real issue is that to lift a few thousand pounds off the ground requires a large volume of air to be moved. You cannot do this in a residential area, the downwash would be too damaging to everything around you. It doesn't matter if you use one large spinning rotor disc or a dozen ducted fans, you still have to propel a large volume of air at high speed, which hits the ground and moves out in all directions.

      So you have to go to a big open space. Like an airport.

      But HTOL requires big [costly] wings to get sufficient lift

      Wings are cheap, the engine is the single most expensive thing in an airplane. If you switch to electric motors, you'll need redundancy so that if one of them fails, you remain airborne, but I'm sure that is solveable. That doesn't resolve the issue that going straight up is the least efficient way to go anywhere, the wings on an airplane actually do a very good job of turning fuel into lift.

      And HTOL aircraft are easier to pilot by humans.

      In forward flight, a helicopter is actually not that hard to fly, it handles much like an airplane once it has enough forward speed (I'm generalizing here, but with only 5 min of guidance, I can get almost anyone doing turns and maintaining altitude in a helicopter). Hovering is what is hard, but computers do that without effort. Most large advanced helicopters have a 4-axis autopilot that can auto-hover, that was solved a long time ago. It is worth noting that the autopilot in those helicopters costs as much as an entire light helicopter does. They are expensive.

      HTOL makes sense for internal combustion engines because the engine is so heavy you don't want more than one of them if you can avoid it.

      The Lycoming IO-360-L2A engine is actually not as heavy as you probably think it is. Sure, it is heavier than an electric motor would be, but then you need all those batteries. Sure, you don't need fuel, but 53 gallons of AVGAS has several orders of magnitude more energy than 318 pounds of batteries would. Even if you take 200 pounds of engine out, 500 pounds of batteries can't compete with the range of 52 gallons of AVGAS. Maybe someday that will happen, but not today.

      As for multiple engines, yes you DO want multiple... I never really cared for flying in single engine aircraft, while they are very, very reliable, they can and do have problems. With two complete engines, you have a backup. I spent time flying in the gulf of Mexico in a single engine helicopter and was never really happy about it, but I needed the job, the flight time, and the experience, so there I was, 100 miles out to sea in a light, single engine helicopter with silly little popout floats that would have been rather useless in 5 foot seas...

      Give me 2 engines any day of the week.

      Side note: Interestingly enough, while 2 is better than 1, it turns out that 4 is not better than 2. In operational experience, the 747 fleet has had more occasions to turn off 1 of the 4 engines than most twin engine jets have had to turn off 1 of the 2 engines. The US Air Force did a study years ago and wanted to convert the B-52 fleet from the older engines with 8 to much newer high-bypass turbofans with just 4 engines, but the money wasn't in the budget. They would save fuel, maintenance, and actually make the plane more reliable, but it would cost lots of upfront money, so they didn't do it. Had they known they would still be flying them in 2015 (and probably 2025, maybe they would have figured out a way to do it)