Scratch

samurai768 wrote:

Urm, there should be some sorta of formula for this...

BRB.

I lookeed for one, could not find it, hope you do! Thx

samurai768 wrote:

What does RPMS stand for?

Rotations per minute?

I wanna be sure 

Yesh, it does

samurai768 wrote:

recycle49 wrote:

samurai768 wrote:

What does RPMS stand for?

Rotations per minute?

I wanna be sure 

Yesh, it does

Yay! I was right >:D

You were, i couldnt find a fourmula could you?

Last edited by recycle49 (2010-10-28 19:17:20)

samurai768 wrote:

recycle49 wrote:

samurai768 wrote:

Yay! I was right >:D

You were, i couldnt find a fourmula could you?

No, I'm sorry. If you can wait a bit I can ask my math teacher or somthin 

But I did learn that the modern dental drill has 797.500 more rpms than a medium sized aircraft (not a helicopter, duh)

Lol

Make sure to get an engine more than capable of lifting the required weight. Are you using an electric motor / magnet or a petrol. Because you are using fuel you need to count for that weight as well.

The cheap way to work on aerodynamics is to use paper (paper planes) .Attach paper clips to simulate weight distribution.

Know what your plane weighs. This will show you the lift force you need to generate vertically.

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Your lift force will be a component of the force supplied by the engine. Based on wing angle, flap angle, friction, aerodynamics (air resitance).

Say your plane had these specs.

Weight: 5kg
Angle: 30 degrees to horizontal. (The angle of the lift to the horizontal)

Gravity is about 9.8ms^-2

So the minimum lift force you need will be.
F = Mass * Gravity
5*9.8 = 490N up every second


As you can see you will need 848.7 N of horizontal force to make the plane fly.

Which is 47.15km/h.

You will have to work out yourself the angle of lift to the horizontal.

I hope I have helped.

Last edited by what-the (2010-10-29 08:25:40)