Zouhir,

Are you asking about reaction motors (like a rocket) or for electrical motors that are fit for powering aerospace mechanisms?

If it's the first type, it would be useful to know the thrust levels and impulse that you are looking for: and whether you demand a solid-state motor (basically a large firework) or need the thrust to be throttled, which requires either an electric or chemical engine.

Simply, more details please.

Hey James,

thank you for your answer

i mean Motor for launch the sailplane, i have chosen Deutz diesel engine FL 413 F.

there is my new Question 

https://www.researchgate.net/post/Loads_who_applied_on_Chassis