helicopter question

[VVM]

hi all.  im currently doing a 4 year technical apprenticeship with a leading compnay who produce surveillance, protection, tracking, targeting, navigation & control and imaging systems.  as part of this apprenticeship i am studying several subjects at college.  one of these subjects is Statics and Dynamics.  My lecturer has given us the task of finding out the forces which act upon a helicopter during flight.  There are apparently 7 forces.  Does anyone know what any of these forces are?  Im not just going to sit back and let you guys answer for me    i am going to try and find out myself, but i thought i would the experiece/knowledge of everyone here to help me out.

Thanks in advance  

[EGNX]

Errmmm well... you'll have:

• Lift
• Drag
• Gravity
• Thrust
• Yaw factor from the torque of the main rotor?
• Force of the tail rotor counteracting the torque?
• Errmmmm yea....

Dunno... thats about all I could think of!...  :)

[VVM]

thanks for that.  yup they seem to be good, i found this site if anyone else is interested.

http://www.helicopterpage.com/html/forces.html

cheers

[Tom...]

Lots more info Here