Picture of r/c racing hovercraft, 2 channel
this is the predecessor to my microlight hovercraft. this one differs in that it includes a lower chamber that distributes air more evenly into the skirt to make the hovercraft more stable, a higher rpm motor, a molded duct with a curved surface surface to exploit the coanda effect giving extra thrust and making the fan more efficient, and also a more sofisticated link system with rudder to take care of steering.
the results are clearly proven because this one performs far better than the original and in this instructable ill try to explain how to build one that will work just as well.
heres a link to a short video i made
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Step 1: Design

Picture of design
hovercraft 3.bmp
here are a few of the CAD software designs i made. the idea was simply to make everything neat and tidy while being fuctional, hence the bathtub for electronic components which also acts as strengthening for the bottom layer. i used Autodesk inventor for my designs and i chose to use the martini racing colour scheme.

Step 2: Base

Picture of base
to start the base i used some material very similar to depron foam which i had lying around. it is cut to a 300x200mm rectangle and all edges are chamfered to 45 degrees. i then cut a 40x100mm hole in the middle for housing the electronic components. underneath some 8mm thickness pieces of the same material were used to make ribs, placed and glued down in the layout shown.
the underside is a piece of white card cut to the same dimensions as the main base with 15 mm extra on all sides. these extra flaps were folded up ready to be glued to the chamfer onn the main piece and a hole punch was used to make some air leaks into the skirt.
this bottom piece should not be glued on just yet, as the linkage for the steering mechanism is hidden between the main basse and the bottom layer.

as im typing this i am building this instructable.


robinpaine1 year ago
There is a 700 page book with 450 pictures with a foreword by The Duke of Edinburgh called 'On a Cushion of Air', (,, Kindle), which tells the story of Cockerell's discovery that heavy weights could be supported by a cushion of low pressure air and the development of the hovercraft from the early days to the heyday of the giant 165-ton SRN.4, which crossed the English Channel starting in 1968 carrying 30 cars and 254 passengers at speeds in excess of 75 knots. The service ended on 1st October 2000. Six SR.4s were built. The book also covers the development of military hovercraft. See


maxtor1821 year ago
How are you inflating the skirt?
if you could make a hole in te front ceenter amd mount another motor with a duct facing the floor it would make a nice skirt of air