Slashdot Mirror
Flying Car by end of year
James Green writes "CNN is reporting something will surely make everyone want to duck - the SkyCar, an invention by Moller International, of California. Quote, "The Batmobile-shaped vehicle will seat four people, do about 5 miles per liter of gas, have a top speed of over 600 mph and will take off and land vertically." It is due for a maiden journey in the next few weeks. "
M200:
It would be nice to see some of the results of the '150' flights of the M200. Was this with a different engine than the Freedom Rotary? The technical information is really a bit lax.
Horizontal: What about landing horizontally? Surely this would save fuel, and be useful when flying into a normal air strip. If they are conforming to anything near the FARs for helicopters, then the landing gear should be strong enough.
Low Speed: The website doesn't give any decent information about the low speed characteristics (stall anyone?) or transition stability.
But then.. maybe they don't have the budget to put all of this information online.
Joshua Lamorie
Aerospace Electronics IV
Carleton University
Do the math on this one folks. The only way he can claim that kind of mileage at 600 MPH is if either the coefficient of drag approaches zero or the fuel has an incredible chemical energy per unit volume. We know the first is unlikely because the car doesn't have any particularly revolutionary shape. As for the second, let's just say that you wouldn't be buying it at your local Mobil station.
-jwb
For those interested:
SkyCar homepage.
-- What you do today will cost you a day of your life.
You can find small aircraft like the Cessna 172 for prices in the $30-$40K range used. Sure, it's not VTOL, and it doesn't have the 'B' sci-fi movie look, but it's available now, plus they've been around forever and for good reason (fairly easy to maintain, pretty reliable).
If it would be legal to just take off from anywhere and land anywhere with one of those SkyCars, it would be kind of nifty. Now if you could just do that AND get out of having to file a flight plan, then I'd start saving my cash for one .
"That's Tron. He fights for the Users."
Moller's been out on his ranch making anouncements like this for decades. Nothing ever comes of it. I've known folks (fellow students at Davis) who have worked with him on the project. They were good students but I've never heard of this thing doing any more than a hover and a short (unmanned) run. Of course, that's how the wright brothers started.... but the Wrights only took about 5 years to go from a bike shop to the first controlled, powered flight....
Davo -- Free speech, free software, AND free beer.
The site also states that the rotary engines that power the Skycar run on ordinary gasoline.
But then again, I could be wrong.
The Skycar's estimated maximum ceiling is 30,000 feet. It's definitely an aircraft =) They're limited to low altitude for the tests because their insurance won't cover much more until the vehicle is proven.
Now whether or not it will actually work well enough to even get off the ground, I don't know.
Top speed is also an estimated 390 mph, not the 600 mph in the Reuters article, and the estimated milage is 15 mpg on standard unleaded gasoline, with a maximum range of 900 miles.
The definition of exactly what the vehicle is has been set by the FAA. It is classified as a "powered-lift aircraft." This contrasts with fixed wing for standard airplanes, and rotary wing for helicopters.
As for takeoff and landing, that will have to occur at airports, although Moller says that the FAA is planning to build several hundred "vertiports" to handle vehicles like his own and a civilian model V-22 Osprey.
But then again, I could be wrong.
From the Reuters article on CNN.com:
But then again, I could be wrong.
If these things become commonplace does that mean that traffic cops will be armed with surface to air missiles?
A couple of points. The first is the question of whether this is a land vehicle or an air vehicle. That could prove troublesome to this project. It looks as if this will qualify as an air vehicle. Does that mean I have to take off and land at an airport? Once I take off, will I fly over roads or something else. Considering the fact that I have to fly only 6 feet off of the ground, then I am fairly limited in my terrain. So, do I have to fly 6 feet off of the ground on open terrain, possibly harming my $60,000 flying machine? Or do I fly 6 feet off of the ground on roadways, where I'll be able to fly at 600 mph.
This brings up another question. If I fly over roadways, will I be under the jurisdiction of the FAA or the local law enforcement agencies (DPS, DMV, police, etc). I doubt I would be able to fly at the posted speed limit of 55, 60, 70 or whatever. Perhaps I'm wrong (I haven't seen the specs), but it would seem that flying that slow would possibly create problems with lift.
Another point about this project is fuel consumption. Assume my fuel economy is 19 miles per gallon. Now assume that I am flying at 450 miles per hour (Not full speed, but fast enough). The math for this works out to me needing 23.6 gallons per hour. That's a lot of fuel (My car doesn't hold that much). So, now the question is also an issue of size. Do you create a smaller vehicle, but require refueling once an hour or so. Or do you create a larger vehicle, which would be more unwieldy (Especially at 6 feet above the ground) and require more training to fly. On a side note, it was shown during the Falkland war that Herrier jumpjets, despite all of their perceived advantages, had horrible fuel consumption rates. The American F-18, despite not being able to land or take off vertically, is considered by many to be a superior jet due to its lower fuel requirements (And the benefit of longer range). Of course, I digress...
Overall, the project sounds like it will need two things. A better definition of just what kind of vehicle this is (And the rules that apply), and better fuel milage.