Screaming fast RC Hovercraft

diyrchovercraft

Of all the homemade RC Hovercraft floating around out there, this build is not only one of the better looking: it’s also unexpectedly quick. [ScratchBuiltAircraft] sourced foam board from the local dollar store to construct the hovercraft’s body and a heavy-duty garbage bag with a hole cut in the center for the skirt. Air reaches the skirt area from the hovercraft’s EDF (Electric Duct Fan — the big one on the back) which pumps the air through a rectangular hole in the base.

A servo mounted behind the fan controls the rudders, while the rest of the electronics and the battery are cleanly tucked away beneath foam body pieces. We’re not sure what kind of top speed the Turnigy motor provides, but it’s probably impressive assuming it can keep from flipping over. Watch it blast off with a bit too much lift in the video below.

For something a bit slower, there’s always the solar powered hovercraft from earlier this summer.

[via Hacked Gadgets]

Comments

  1. Drake says:

    it would probably help to balance the weight and then attach an inverted airfoil to keep it from taking off at speed

  2. Clover says:

    It’s a nice build form scrap, but I’d hardly say it was fast or especially stable.
    The instrutables page describes how the driving fan was previously used on a craft that flew at 60-70 m.p.h.
    This thing seemed to either dig in at the front or flip doing anything over maybe 10 miles an hour.

  3. me says:

    Nice try, but it looks like it needs better trimming. Whenever he applies power, the front end dives into the ground, and the back end lifts. I think it’s because of the positioning of the fan. It’s still quick, but that’s mostly due to the sheer amount of power and lack of weight, as it still seems to be dragging a bit too much. I’d be inclined to add some sort of fin in the outlet of the fan, to try and push the back end down again. That ought to balance it out when he applies power, meaning that he gets properly in the air, and gets even more speed. I’ve previously built an RC hovercraft, and that took quite a bit of fiddling to get right. It’s still rather on the heavy side, so it’s due a mk2.

  4. ameyring says:

    It’s inspiring me to try one as well! This guy should show how well it works on low-cut grass and water.

  5. GameboyRMH says:

    Most RC hovercraft have the thrust pointed upwards slightly to keep the nose from digging in as you apply power. When it’s pointed straight, the thrust causes the hovercraft to pitch down.

  6. ka1axy says:

    Looks like it could benefit from some rudders — it steers well, but seems like it has trouble going straight at high speed. Nice platform for additional experimentation, though.

  7. soopergooman says:

    Nice ,made a miniature one of these a few years ago from zipzap parts. Looks plenty fast to me. Like someone else said, a downward airfoil will def help with the lifting effect. Maybe a few weights in the rear too. Otherwise a very nice job of it! You do us Foamies Proud.

  8. MRE says:

    I suspect the digging in, as well as the speed issues, etc can all be corrected with a much more efficient skirt design. Most of the ‘difficult’ engineering is in the skirt. A trashbag made for a quick proof of concept, and it ‘works’ but not that well.
    A better design would be to use tubes around the sides, with many smaller holes along the bottom face.

  9. Galane says:

    It needs an elevator in the exhaust flow that’s tied to the throttle so that as throttle is increased the elevator automatically compensates by applying downforce to the rear.

    A solid state gyro would help with that and steering to stabilize pitch and yaw. Any sort of static wings or fins will only work in a narrow speed range.

  10. Exit151 says:

    Pretty cool project, despite minor flaws here or there. Shows lots of potential and definitely something that others will enjoy recreating and/or modifying in the future. Thanks for sharing!

  11. Mystick says:

    I think the CG is off a bit, by the way it moves. It’s as important on a hovercraft as on an aircraft…

  12. Matthias says:

    Well… that’s about as sketchy as a random link can be. Autodownload a JPG… nope.

  13. Max Siegieda says:

    It’s also just a picture of a foam tray which could have been described adequately with the words “foam tray”. Excuse me, I have to go re-install this OS now :P

  14. skunix says:

    I like how you say this OS as if it could be anything but Windows that would have an issue.

  15. drinkinga40khammer says:

    Mhmm: http://technet.microsoft.com/en-us/security/bulletin/ms04-028

    For the link-adverse: Security flaw MS04-028 indicates a JEG processing flaw that is reused in all of MS systems that can cause a buffer overflow and remote code execution. Colloquially known as the jpg of death. There has been a patch for a very long time (2004). Some groups have claimed working on patched systems as recently as last year but have not been able to show proof.

    Essentially not a problem in any system that has had effective maintenance in the last seven years-probably. Still, does not pass smell test.

  16. Exit151 says:

    Don’t be a hater.. Just because ‘your’ OS is not cool enough to draw in the hacker/virus creator community to your OS, doesn’t give you the right to bang on Windows. Your coffee shop OSX rig isn’t above the ranks of being hacked, it’s just that no one cares about hacking into that small of a percentage of users..

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