- #1
fatdaddym
- 3
- 0
hi there, I am building a hovercraft in my garage, so far it has gone perfect...
until i get to the thrust part! for some reason i can't get the darn thing to move! for lift i have a kawasaki back pack blower pushing air down into an air mattress with holes punched in it and it works lovely. when i sit on the seat it hovers around my garage seemingly at zero friction. i thought that would be it, but i was wrong... it seems that i could use some big brain help, maybe someone out there has an equation that could help figure exactly how many cfm's i need or rpm's or even something to put me in the right direction. my hovercraft weighs apox. 300lbs with me on it, and like i said could be real close to zero friction at least it seems like it when I am hovering back and fourth effortlesly in my garage. and for the trust part so far i have a 24'' paint booth exhaust fan with a 5 hp engine with ? rpm's . the engine and cowl seem to be very promising but the fan blade doesn't seem to be pushing enough cfm's? idont know if that is even right! but maybe someone does? please help, and remember, I am no physicist so keep it kinda basic for me please! thanks a million
until i get to the thrust part! for some reason i can't get the darn thing to move! for lift i have a kawasaki back pack blower pushing air down into an air mattress with holes punched in it and it works lovely. when i sit on the seat it hovers around my garage seemingly at zero friction. i thought that would be it, but i was wrong... it seems that i could use some big brain help, maybe someone out there has an equation that could help figure exactly how many cfm's i need or rpm's or even something to put me in the right direction. my hovercraft weighs apox. 300lbs with me on it, and like i said could be real close to zero friction at least it seems like it when I am hovering back and fourth effortlesly in my garage. and for the trust part so far i have a 24'' paint booth exhaust fan with a 5 hp engine with ? rpm's . the engine and cowl seem to be very promising but the fan blade doesn't seem to be pushing enough cfm's? idont know if that is even right! but maybe someone does? please help, and remember, I am no physicist so keep it kinda basic for me please! thanks a million