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Calculate glide speed/thrust

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Hello again! =)

 

I am having some trouble with my 2d flight simulator.

Does anybody have a formula for the thrust created forward when the airplane is pitched forward without engines, just gliding?

 

Basically i have my airplane flying with very good numbers with engine-thrust. But if i cut power, i wont accelerate if i point the nose down. (neither with engines)

 

I have some thought about taking the -angle-of-attack and take the absolute number and multiply it against some constant so that the thrust force increases when the angle of attack decreases.

But this is just a hack.

 

I wonder if there is a formula for this? Depending on Weight,angle of attack, Wingspan etc what thrust is being produced?

Edited by KurtO

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Force = mass * Acceleration

 

So, given the mass, use gravity for the acceleration and calculate the force.

 

With the airplane pitched forward, use trigonometry to determine what fraction of that force is downward, and what fraction is forward.

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ah cool. 

Then i guess i have to try some "transfer" constant that makes the glide ratio of 15:1 like normal airliners have.

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