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  1. #1
    Join Date
    Aug 2006
    Location
    Raymore Missouri
    Posts
    1,920

    Default Home Made Hovercraft with pictures...

    After a few requests for pictures of a hovercraft I built, I finally found them and here you go:

    I built this in 1977 when I was much younger and had more hair (actually I still have the same amount of hair, it has just moved to other parts of my body)

    Specs: Approx 12 ft long by 5 1/2 ft wide
    constructed of 3/8 plywood and wood products with fiberglassed
    seams and top.
    Air skirt...silver coated, neoprene with nylon thread (very strong
    but flexible stuff).
    Seams glued with Bostick (sp) 1177 (contact cement)
    and stitched by hand.
    Two 18hp 2 stroke gas engines...
    one engine turning a 30 in duct propeller for lift...direct drive
    one engine with belt reduction turning a 42 in propeller for propulsion.
    Will float- approx 1000lbs floatation per product literature
    Plans were purchased from Universal Hovercraft -this model, I believe
    was a UH 12.
    Original plans called for a single engine; driving both props.
    What I did not like about that was if you lowered your propulsion
    prop speed, you also lowered the lift fan speed, which would bottom
    out the unit.
    That is why I went with two engines...I could stop forward movement
    without losing any lift.

    Each engine has a voltage output wire which I connected to two panel mount volt meters and calibrated to use as tachs
    That is what the two pod looking things ahead of the steering wheel are. Each engine has its own throttle and can be controlled individually.
    Propellers and hubs were purchased from a company called Banks Maxwell.
    I found the engines locally at a Go Cart supply. They are rated for
    18 hp if they have tuned exhaust; which they didn't.
    When I made this I had a jig saw, belt sander, hand drill, small tap & die set and not much else.
    Attached Images Attached Images
    Last edited by monte55; 03-12-2008 at 02:35 PM.
    Nick
    Miller 252 Mig
    Miller Cricket XL
    Millermatic 150 Mig
    Miller Syncrowave 200 Tig
    2-O/A outfits
    Jet Lathe and Mill
    Jet 7x12 horz/vert band saw
    DeWalt Multi Cutter metal saw
    Century 50 Amp Plasma Cutter
    20 ton electric/hydraulic vertical press
    Propane Forge
    60" X 60" router/plasma table

    www.youtube.com/watch?v=jTu7wicVCmQ
    Vist my site: www.nixstuff.com
    and check out some of my ironwork and other stuff

  2. #2
    Join Date
    Aug 2006
    Location
    Raymore Missouri
    Posts
    1,920

    Default Home Made Hovercraft..last picture

    Actually what we call a hovercraft I believe, was invented by the British and are known as GEM--- ground effect machines.
    Attached Images Attached Images
    Nick
    Miller 252 Mig
    Miller Cricket XL
    Millermatic 150 Mig
    Miller Syncrowave 200 Tig
    2-O/A outfits
    Jet Lathe and Mill
    Jet 7x12 horz/vert band saw
    DeWalt Multi Cutter metal saw
    Century 50 Amp Plasma Cutter
    20 ton electric/hydraulic vertical press
    Propane Forge
    60" X 60" router/plasma table

    www.youtube.com/watch?v=jTu7wicVCmQ
    Vist my site: www.nixstuff.com
    and check out some of my ironwork and other stuff

  3. #3
    Join Date
    Feb 2008
    Location
    Seattle, WA
    Posts
    22

    Default

    Very cool. How was it to fly/drive?

  4. #4
    Join Date
    Dec 2007
    Posts
    157

    Default Wow, too cool

    Thanks for posting the pics Monte. Tell us how it drove and how do you stop?
    John

    Thunderbolt AC/DC
    MM 175
    Maxstar 150 STL
    Blue Star 185 DX
    Spectrum 375

  5. #5
    Join Date
    Aug 2006
    Location
    Raymore Missouri
    Posts
    1,920

    Default

    To stop very qiuckly....hit a building or similar. Your'e floating on a cushion of air and there are no brakes. You can do a 180 and apply full thrust power
    to slow you down or shut down lift fan and settle on the skids. If in water, you'll slow down fast with a power shut down. They can go anywhere it's flat
    and depending on thrust power, climb grades. I really had no place to use it without a lot of hassle. I love things that use engines, propellers, etc. so this seemed like a good project. If you have access to a large area or frozen lake, it would be a blast. They can go from water to land and keep on going if nothing gets in your way.
    Nick
    Miller 252 Mig
    Miller Cricket XL
    Millermatic 150 Mig
    Miller Syncrowave 200 Tig
    2-O/A outfits
    Jet Lathe and Mill
    Jet 7x12 horz/vert band saw
    DeWalt Multi Cutter metal saw
    Century 50 Amp Plasma Cutter
    20 ton electric/hydraulic vertical press
    Propane Forge
    60" X 60" router/plasma table

    www.youtube.com/watch?v=jTu7wicVCmQ
    Vist my site: www.nixstuff.com
    and check out some of my ironwork and other stuff

  6. #6
    Join Date
    Feb 2008
    Location
    flat , and lots of dirt
    Posts
    123

    Default

    How effective was that windshield?
    SYNCROWAVE 200
    Atlas 618 lathe (vintage 1960) reconditioned DC
    Sioux 3/8 Pneumatic Reversible Drill
    Makita Everything else
    2400 square feet of Sanford and Son lookin shop space
    "Once the spoon flys, putting the pin back in won't solve anything"
    USA 15T, 15V

    www.myspace.com/blackbird455

    http://i100.photobucket.com/albums/m...5/DSC00356.jpg two cans, one welder

  7. #7
    Join Date
    Aug 2006
    Location
    Raymore Missouri
    Posts
    1,920

    Default

    Actually it's a water splash guard which just got in the way and I removed as you can see in the pics.
    Nick
    Miller 252 Mig
    Miller Cricket XL
    Millermatic 150 Mig
    Miller Syncrowave 200 Tig
    2-O/A outfits
    Jet Lathe and Mill
    Jet 7x12 horz/vert band saw
    DeWalt Multi Cutter metal saw
    Century 50 Amp Plasma Cutter
    20 ton electric/hydraulic vertical press
    Propane Forge
    60" X 60" router/plasma table

    www.youtube.com/watch?v=jTu7wicVCmQ
    Vist my site: www.nixstuff.com
    and check out some of my ironwork and other stuff

  8. #8
    Join Date
    Sep 2005
    Location
    S.W. Pennsylvania
    Posts
    2,250

    Default

    Quote Originally Posted by monte55 View Post
    To stop very qiuckly....hit a building or similar. Your'e floating on a cushion of air and there are no brakes. You can do a 180 and apply full thrust power
    to slow you down or shut down lift fan and settle on the skids. If in water, you'll slow down fast with a power shut down.
    With some cleaver engineering I would think you could design a propeller with an adjustable pitch, enough to actually reverse the thrust, that would effectively slow you down and bring it to a stop. Kind of like a helicopter rotor but less intricate as you would not need it for directional control.
    To all who contribute to this board.
    My sincere thanks , Pete.

    Pureox OA
    Westinghouse 300 amp AC stick
    Miller Syncrowave 250
    Hexacon 250 watt solder iron

  9. #9
    Join Date
    Feb 2008
    Location
    flat , and lots of dirt
    Posts
    123

    Default

    There are quite a few manufacturers out there now that offer small props that have "beta" range pitch control.......in 1977 that would have been nearly impossible to find one that would work on an 18 horse .
    SYNCROWAVE 200
    Atlas 618 lathe (vintage 1960) reconditioned DC
    Sioux 3/8 Pneumatic Reversible Drill
    Makita Everything else
    2400 square feet of Sanford and Son lookin shop space
    "Once the spoon flys, putting the pin back in won't solve anything"
    USA 15T, 15V

    www.myspace.com/blackbird455

    http://i100.photobucket.com/albums/m...5/DSC00356.jpg two cans, one welder

  10. #10
    Join Date
    Aug 2006
    Location
    Raymore Missouri
    Posts
    1,920

    Default

    I have no idea what a BETA RANGE pitch blade is. Please explain.
    Nick
    Miller 252 Mig
    Miller Cricket XL
    Millermatic 150 Mig
    Miller Syncrowave 200 Tig
    2-O/A outfits
    Jet Lathe and Mill
    Jet 7x12 horz/vert band saw
    DeWalt Multi Cutter metal saw
    Century 50 Amp Plasma Cutter
    20 ton electric/hydraulic vertical press
    Propane Forge
    60" X 60" router/plasma table

    www.youtube.com/watch?v=jTu7wicVCmQ
    Vist my site: www.nixstuff.com
    and check out some of my ironwork and other stuff

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