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Build Your Own Flying Lawn Mower

Ant writes "Ever seen a flying lawn mower (streaming; download 5.1 MB WMV file) before? I haven't. The WMV video file description says: 'FlyingThingZ Sky Cutter .40 V2 flying at Moon Lake's Annual Make a Wish Foundation Airshow for 2004'. More information can be found on the official Web site. Seen on Blue's News. My good friend, KaT, brought up a good question: 'Since lawns (also known as grass) live usually less than 6" from the ground, how would flying help them do their job better?'"

65 of 284 comments (clear)

  1. Mirror by Anonymous Coward · · Score: 5, Informative

    in case of slashdotting on that site and to reduce slashdotting on my site (I get 25 GB per month... i'll use about 20 this month)... tack on the filename in the 5.1 MB file link to "http://www.calcgames.org/site/pub/" and it'll be there. Please, if you have bandwidth, mirror it to your site, and PLEASE do NOT post a linky to my site.

    1. Re:Mirror by Dr+Reducto · · Score: 4, Informative

      I have unlimited bandwidth at school, try me:

      Skycutter Vid Link

      I really want to piss off OIT, maybe even bring down the outbound router. Do your worst.

    2. Re:Mirror by Anonymous Coward · · Score: 2, Informative

      Also mirrored here and is fast for australians (100mbit)

      http://eddie.ratm.net/slashdot/skycutter40-1.wmv

    3. Re:Mirror by Dr+Reducto · · Score: 2, Informative

      If you're at an Internet 2 school, you are getting it off the Internet 2 link, so you're getting the firehose that is Internet 2 during off-peak hours.

      And if you are at an Internet 2 school, may I suggest i2hub, for incredible file sharing bliss. I pull down movies in like 30 minutes.

  2. Just great. Yeah, that's what I need... by Anonymous Coward · · Score: 5, Funny

    ... to not just mow the grass, but to give my neighbor a haircut!

    1. Re:Just great. Yeah, that's what I need... by Tablizer · · Score: 4, Funny

      ... to not just mow the grass, but to give my neighbor a haircut!

      This may be a way to speed up recruits to Iraq. Line them all up outside, and have the thing fly in low: Bzzzzzzzzzzzt, and everybody is nice and trim with a smooth flattop. It can also be used to weed out the squeamish, who duck and run when they see it coming.

    2. Re:Just great. Yeah, that's what I need... by AndroidCat · · Score: 2, Funny

      Yeah, everybody is nice and trim and now the same height.

      --
      One line blog. I hear that they're called Twitters now.
  3. This looks fcuking dangerous... by Dr+Reducto · · Score: 5, Funny

    What's that in the sky?

    Is it a bird?

    Is it a plane?

    It looks....it looks like a lawn mower!

    FUCK!!! IT'S COMING RIGHT FOR US!!! DUCK!!!

    *Mower "Mows" through field of humans*

    1. Re:This looks fcuking dangerous... by MustardMan · · Score: 4, Funny

      You don't duck when something is COMING RIGHT FOR you, you shoot it. Duck and cover only works with lava. Duh.

    2. Re:This looks fcuking dangerous... by Zorilla · · Score: 2, Funny

      .....you must be new here?

      Offtopic in 5, 4, 3, 2...

      --

      It would be cool if it didn't suck.
  4. Okay, relax by Dancin_Santa · · Score: 5, Funny

    It's just a model airplane, not a real lawnmower.

    My niece was killed by a flying lawnmower when she was 4. The thing leapt off the ground after hitting a stump and the rotation of the blades created enough lift to set it into flight. You'd have expected the automatic cutoff to kill the motor, but my brother in law held on to the thing and it just took off. She was playing on the second floor balcony when my BIL and the mower caught her upside the temple. Took her scalp clean off.

    She's better now, but those first few hours were pretty harrowing.

    1. Re:Okay, relax by WhatAmIDoingHere · · Score: 5, Funny

      "My niece was killed by a flying lawnmower when she was 4.... She's better now, but those first few hours were pretty harrowing."

      What a recovery!

      --
      Not a Twitter sockpuppet... but I wish I was.
    2. Re:Okay, relax by voidptr · · Score: 2, Informative

      My niece was killed by a flying lawnmower

      She's better now

      Huh?

      --
      This .sig for unofficial government use only. Official use subject to $500 fine.
    3. Re:Okay, relax by ImTwoSlick · · Score: 2, Funny
      My niece was killed by a flying lawnmower when she was 4.
      [snip]
      She's better now, but those first few hours were pretty harrowing.

      Glad to hear she recovered from DEATH.

    4. Re:Okay, relax by nulltransfer · · Score: 5, Funny
      My niece was killed by a flying lawnmower when she was 4.

      She's better now, but those first few hours were pretty harrowing.

      I, for one, welcome our new undead overlords.

      --

      My dog ate my sig
    5. Re:Okay, relax by hazem · · Score: 2, Funny

      She turned me into a newt! ... ... ...
      I got better.

    6. Re:Okay, relax by Bull999999 · · Score: 4, Funny

      My niece was killed by a flying lawnmower

      She's better now

      Huh?


      I guess she just respawned.

      --
      1f u c4n r34d th1s u r34lly n33d t0 g37 l41d
    7. Re:Okay, relax by arose · · Score: 4, Funny

      Give your niece an Amulet of Life Saving today!

      --
      Analogies don't equal equalities, they are merely somewhat analogous.
    8. Re:Okay, relax by Aoreias · · Score: 5, Funny
      What a recovery!

      Indeed. Just a few repairs and the lawnmower was back in action later that week.

      --
      We've upped our standards. Up yours.
    9. Re:Okay, relax by UniverseIsADoughnut · · Score: 2, Funny

      Maybe she is part Newt.

    10. Re:Okay, relax by n6mod · · Score: 2, Informative

      You, uh, didn't look too hard for one, did you?

      Flymo

      -Z

      --
      You have violated Robot's Rules of Order and will be asked to leave the future immediately.
    11. Re:Okay, relax by fireman+sam · · Score: 2, Interesting

      Do you realize why the lawnmowers are designed to "suck". It is to lift the grass blades so they can be cut better.

      The problem with the flymo is it did not lift the grass, but forced it down with the air pressure that was required for the mower to "fly". Therefore, the flymo would not cut the grass properly.

      --
      it is only after a long journey that you know the strength of the horse.
    12. Re:Okay, relax by rjshields · · Score: 2, Funny

      She's better now, but those first few hours were pretty harrowing.

      It was touch-and-go for the lawnmower.

      --
      In this world nothing is certain but death, taxes and flawed car analogies.
  5. Video File by Combuchan · · Score: 4, Informative

    The video file is likely to slashdot the server, so I've created a mirror at http://emvis.net/skycutter40-1.wmv. Enjoy.

    --sean

    --
    "[T]he single essential element on which all discoveries will be dependent is human freedom." -- Barry Goldwater
  6. Flying do-dahs by thedogcow · · Score: 4, Funny

    Yeah, but can it mulch?

    --
    Yes! I listen to NYC Speedcore and do math at 3AM. I suggest you try it too.
  7. Seeing that video . . . . . by theparanoidcynic · · Score: 5, Insightful

    Made the part of my brain that knows things about fluid mechanics shut down and the other part go get a drink. I'm beyond baffled as to why the thing not only flies, but apparently handles pretty well.

    --
    Only in a Slashdot fantasy can a Slackware install turn into several hours of sex . . . . .
    1. Re:Seeing that video . . . . . by bleckywelcky · · Score: 4, Interesting

      A guy at my local flying club where I used to live had built a flying mower, although it was red, not green. Really, the thing is just very lightweight and the thrust from the prop-engine is capable of supporting the weight of the craft (ie, it could fly in a vertical position like a helicopter just fine). You'll notice that during most of the flight, the thing has a fairly high angle of attack in order to provide the lift necessary.

      Actually, there was another guy (not sure if this was at the same flying club or some other place) that built a plane that looked exactly like Snoopy sitting on the top of his dog house like the Red Baron. Except, you could not tell what the lifting surface was (except for the bottom of the dog house). There were no wings sticking out or anything. It just looked like Snoopy sitting on his dog house. Pretty cool stuff.

    2. Re:Seeing that video . . . . . by dougmc · · Score: 2, Informative
      I'm beyond baffled as to why the thing not only flies, but apparently handles pretty well.
      It flies well because it's grossly overpowered. It's basically just a low aspect ratio flying wing, with some extra stuff thrown in for show.

      Kill the engine, and it will be landing pronto.

    3. Re:Seeing that video . . . . . by Daniel_Staal · · Score: 4, Informative

      Pound for pound, model airplane engines have the highest horsepower of any internal combustion engine. Realize they are basic in design, with high-quality tolerances, and the bare minimum of metal to contain and cool. All unnecessary weight is dropped: there is no battery, no starter. The throttle works directly on the airfeed, which pulls the fuel by suction. (Occasionally helped by pressurized tanks.)

      They are simple. But they only have to do a simple job, and they do it well.

      --
      'Sensible' is a curse word.
    4. Re:Seeing that video . . . . . by dougmc · · Score: 2, Interesting
      Well, duh! Kill the engines of a 747 and...
      Obviously you don't fly many R/C planes. That's fine. I do.

      Some glide extremely well, and others fall out of the sky the moment the engine dies. This flying lawn mower probably falls into the latter category. Running out of fuel doesn't mean you'll crash (even a helicopter can land safely with no power) but let's hope you're not far from the field, or you'll be looking for your plane.

    5. Re:Seeing that video . . . . . by merlin_jim · · Score: 4, Interesting

      If you look carefully, you'll notice that the body itself is an airfoil, with two horizontal control surfaces out of the back.

      I'm guessing the handle plus the square dome on top (which if you notice is completely hollow) function as vertical stabilizers.

      But yeah if you look at his flight, his stall angle is very close to vertical. I'd say about a 80 degree angle of attack... indicating that the engine is in fact providing most of the lift throughout flight... he's definitely doing some fancy tricks with those stabilizers to keep the lift up. When he goes into level flight is in the middle of the video when he bounces off the ground hahaha

      --
      I am disrespectful to dirt! Can you see that I am serious?!
    6. Re:Seeing that video . . . . . by dougmc · · Score: 3, Informative
      I'll still pick the lawnmower over the 747!
      Me too, probably.
      By the way, from what I understand, a helicopter can only safely land if it was moving forward at the time the engine died (i.e., not hovering)
      Not quite true. If a helicopter engine dies with the copter 10 feet up, it's going to land hard or crash unless the rotors were already spun up extra fast.

      But outside of that, it either needs plenty of altitude *or* forward speed to land safely. Either will do. What the pilot does is adjust the pitch of the blades (the collective) so that the forward movement or the movement of the helicopter down speeds them up. Once you get close to the ground, you adjust the collective the other way to flare your approach. Requires quite a bit of practice to get right. :) (no, I can't do it yet.)

    7. Re:Seeing that video . . . . . by Bitsy+Boffin · · Score: 2, Interesting

      Airliners actually have quite exceptional glide ratios for powered craft, a 747 is in the region of 15:1 (15 units horizontal for 1 unit vertical), better than many light aircraft.

      --
      NZ Electronics Enthusiasts: Check out my Trade Me Listings
    8. Re:Seeing that video . . . . . by Fizzl · · Score: 3, Informative

      Nothing very exciting actually :)

      I've built my first RC airplane recently, and thus have roamed the appropriate forums. You wouldn't believe what kind of contraptions these guys build.

      I have to admit the skycutter was the best one I have ever seen. (Was linked in my local R/C airplane forum few weeks back.)

      The thing is made of debron, the ultimate end-all material of indoor and other wacky fliers. It weights next to nothing and is rather durable. It is a foam, used mostly in insulation of floors and fast food packaging.

      By the looks of it, I'd say the skycutter weights under 2 kilograms. Which is quite easily taken airborne with .40 cc glow engine running with 70% methanol, 15% oil, 15% nitromethane. ;P

      Planes this light don't actually need any kind of airfoil. Flat control surfaces are enough to adjust where you want the lift to go.

      So again -- With enough static thrust, you can fly a rock.

  8. Nothing that amazing by OverlordQ · · Score: 5, Informative

    Just a small model of a lawn mower made out of balsa and foam with an engine tacked on.

    --
    Your hair look like poop, Bob! - Wanker.
    1. Re:Nothing that amazing by timeOday · · Score: 3, Interesting

      Killjoy! I'm amazed at how well it flies. I've never seen a lawnmower do a loop in midair before.

    2. Re:Nothing that amazing by blancolioni · · Score: 2, Funny

      Oh, I bet you're a hit at parties.

  9. Ha ha ha! by The+Mainframe · · Score: 2, Funny

    Yeah, right, put a link to a 4.9MB file on the front page of slashdot. Gooood idea.

    Like shooting fish in a barrel.

    --
    --Bennett Prescott
    Former Lord Of Packets
    1. Re:Ha ha ha! by Anonymous Coward · · Score: 5, Funny

      amazingly the server is holding up quite well... i'm getting a good 10 mbps every time i download it (and i've downloaded it like 10 times just to be sure).

  10. This is news? by mOoZik · · Score: 2, Informative

    C'mon, hobbyists have been making and flying this for years and years. I'd be impressed IF they implemented some kind of a height-restriction system to keep the "mower" some distance above the ground, say a few inches or a foor or whatever. But there is nothing unique about this. Sorry.

  11. Wow... by graffix_jones · · Score: 5, Funny

    I've discovered that I really have a liking for 'Industrial Squaredance' music...

    /me makes an appointment with his psychiatrist.

    1. Re:Wow... by Jace+of+Fuse! · · Score: 2, Funny

      See, the problem with seeing this video with this music in my line of work, in my location, and knowing my co-workers is this: If I let them see this video all productivity will stop and the new mission will be to make a lawn mower fly. But not just a little pushmower. And not a model either. My redneck coworkers are very inclinded to do some very stupid stuff and before you know it one of them will attempt to fly their John Deer tractor over Nashville.

      On second thought, I think I'm going to put this on a CD and take it to work monday.

      --

      "Everything you know is wrong. (And stupid.)"

      Moderation Totals: Wrong=2, Stupid=3, Total=5.
  12. It's just like the old saying goes by otterpop378 · · Score: 3, Funny

    If a lawnmower had wings, it wouldnt bump it's ... wait... that's not right.

  13. This is NOT what I expected by HawkinsD · · Score: 4, Interesting

    I assumed that "flying lawnmower" meant somethinglike the ill-fated HoverMow device: a British invention, I think, that eliminated the wheels on the lawnmower by making the blades create a strong downdraft. A flexible rubber skirt retrained the air cushion, and voila! a lawnmower that moved effortlessly, even over moderately uneven terrain.

    It did NOT, however, cut grass effectively, since the fan-effect tended to smush the grass down out of the way of the blades.

    So I was already writing the standard Slashdot "This is old news! I know all about this already" sneer in my head when I clicked on the FA.

    But then I saw this startling thing of... yes, of beauty. Fastinating. Even a lawnmower can be graceful.

    I am humbled.

    Oh, and Fljúgandi....ehhh....sláttuvél? also.

    --
    Never attribute to malice that which can be explained by mere idiocy.
  14. Classic RC Funfly plane by thinwater · · Score: 2, Informative

    The flying lawnmower's been a staple design in the the "fun fly" catagory of RC (radio control)for years. Always a head turner for those not into RC. Since they tend to fly like a brick outhouse, this one was either very well designed or flown by a really good RC pilot (or both). Nice video too.

  15. overkill by tverbeek · · Score: 3, Insightful
    how would flying help them do their job better?

    I'm still trying to figure out how combustion engines or electric motors help grass cutters do their job better, let alone propulsion mechanisms to compensate for the weight of the motors... which require even more power to compensate for their own weight, and nuisance safety mechanisms which have to stop the engine if you loosen your grip on the controls... in a viscious cycle that deploys so bloody much energy at trimming such little blades of grass. Personally, I get pretty good results - and a nice, trivial amount of peaceful exercise - from an inexpensive, quiet, low-tech reel mower.

    --
    http://alternatives.rzero.com/
    1. Re:overkill by mikewren420 · · Score: 2, Funny

      Personally, I get pretty good results - and a nice, trivial amount of peaceful exercise - from an inexpensive, quiet, low-tech reel mower.

      I'm sorry, you must be foreign. ;)

  16. Early adopter... by tentimestwenty · · Score: 4, Funny

    I'm still waiting for the flying toaster.

    1. Re:Early adopter... by Anonymous Coward · · Score: 2, Funny

      My niece was killed by a flying toaster when she was 4. The thing leapt off the counter after hitting it with a fork and the rotation of it created enough lift to set it into flight. You'd have expected the automatic cutoff to kill it, but my brother in law held on to the thing and it just took off. She was playing on the second floor balcony when my BIL and the toaster caught her upside the temple. Took her scalp clean off.

      She's better now, but those first few hours were pretty harrowing.

    2. Re:Early adopter... by goneutt · · Score: 3, Interesting

      I'm still waiting for the flying toaster.

      Ah, a /. challenge. First one with a working real world flying toaster gets to have his server crashed.

      --
      Bacardi + slashdot = negative karma.
  17. Another Mirror by nmb3000 · · Score: 2, Informative
    Another mirror for that WMV, courtesy of MirrorDot.org.

    skycutter40-1.wmv

    "This shit really works!" -- Possible MirrorDot slogan

    --
    "What do you despise? By this are you truly known." --Princess Irulan, Manual of Muad'Dib
    /)
  18. if you like Cotton Eye Joe... by Anonymous Coward · · Score: 2, Informative

    If you like Cotton Eye Joe (by Rednex), check out Swamp Thing (by The Grid).

  19. check out the official site by SkyMunky · · Score: 2, Informative

    It's a remote-controlled (RC) "toy". It's made of balsa/plywood/etc.

  20. Close up shot of mower in flight by Katz_is_a_moron · · Score: 3, Informative

    You can appreciate the details.

  21. Lawn Sky by Tom7 · · Score: 2, Interesting

    Amazingly, I just recently recorded a song about flying lawnmowers as part of the album-a-day project . I never thought it would be topical on slashdot...

  22. I'm buying one right now by atarione · · Score: 3, Funny

    a. that thing is hella kewl

    b. it will surely teach my neighbor to STFU about my lawn care habits, when it flys by his 2nd story window.

    c. who needs c? a and b are convincing enough for me

    --
    actually I am happy to see you, however that is in fact a banana in my pocket.
  23. Is it a bird? by Anonymous Coward · · Score: 5, Funny

    I always felt sorry for the people who yelled "is it a bird?" and "is it a plane?" during the intro. Do these people get excited every single time they see a bird or plane?

  24. Re:Just not enough merit, I guess. by GrueMaster · · Score: 2, Interesting

    I used one from when I was 10 until it died when I was 19. Thing mowed great. There was no throttle (most basic push mowers have a fixed throttle even now). It was light enough to hang on the wall of our shed. As to bagging, as long as the blade was sharpened regularly (seasonally), then it mulched the grass to a very fine grade, which in turn kept the grass fertilized. We had 3/4 of an acre of grass, some of it on a ~45 degree slope. Instead of pushing a mower up and down, I would go side to side, standing above the mower (try that with a conventional mower). The only drawbacks to the one I had, was that it was 2 stroke (different mix than our weed eater or chainsaws), and to start it, you held the handle straight up abothe the engine, placed your left foot on the mower deck side (there was a non-slip foot pad there), tilted the mower towards you, and pulled like a SOB hoping it would start. You also had to keep your lawn well cut, because if it got too high to mulch, the grass would clump and you'd have to rack & remow the areas that were collapsed by the clumps.

    My dad still has it hanging in his shop (he's moved twice since I grew up), thinking that he'll repair it some day. As a mechanic, he makes a great lawyer. Guess I'll end up inhereting it.

  25. Re:how does this work? by Erioll · · Score: 5, Informative

    This thing (or a variant) has been around at LEAST 6 years (probably a lot longer, but that long at least I remember seeing a picture of it).

    The way it works is that the "deck" of the lawnmower itself is the wing. It is essentially a strange-shaped flying wing. The "bars" to the handle are the rudders, and there's elevons (combination aileron/elevator) behind the deck/wing. You can easily see the engine and propellor on the front as-is.

    Neat to see more pictures of it though, even if variants of it have been around for a while.

    Erioll

  26. There are updates available for your lawnmower. by raam · · Score: 2, Funny

    Ahh, mediocrity+ detection tool installed.

    Friday night surrelity patch applied.

    Your evening is protected from mundanity.

  27. Re:BullShit by GMC-jimmy · · Score: 3, Funny

    [BLOCKQUOTE][I]Will this physics book include information about how he brought his niece back from the dead?[/I][BLOCKQUOTE]

    Maybe if it has lots of pictures.

    --
    __________________________________
    Free your mind - Flush your toilet
  28. Only A Quote From 'Firefly' Is Appropriate: by Caraig · · Score: 4, Funny

    "This must be what going mad feels like."

    --
    "I am an Adept of Tantric VAX."
  29. Re:how does this work? by Ron+Atkinson · · Score: 2, Insightful

    I'm 38 years old and flying mowers were around at shows when I was a little kid. It's probably accurate to say that they've been around at least as long or longer than I've been alive.

  30. Flying car joke or beheading joke? by lashi · · Score: 2, Funny
    Hmm... should I go with the boring old flying car joke or should I go with tasteless beheading joke?

    Sigh, it's Friday night, I think I will go out and get a life instead.

    Oh, Who am I kidding? I am on slashdot.

  31. ROFL by Goeland86 · · Score: 2, Interesting

    is that stupidly genius or ingeniously stupid? I spent 3 minutes of the video wondering if it was a real lawnmower casing or not, then I saw the landing gear underneath... The illusion's great though! Skycutter... I wonder if it'll work to cut off the typhoons or the hurricanes. Ideas?

    --
    ---- I am certain of only one thing : I know nothing else.