posted 08-12- 02:56 AM
Ever wonder just how realistic the physics in open plane are? This will probably appeal more to the techie types on the board, but I thought you might want to know how scarily realistic OP can be. We had a problem in the P-26 FM, the nose of the plane would wobble at a certain frequency no matter how we changed the plane. Had all of the FM guru's stumped.
I finally had what I thought was a hair brained idea . Hmmmmmm- the prop and engine rotate at the same rate ( gear ratio 1). Then I thought Nah that can't be it, other planes are using that gear ratio.
Funny thing I learned in physics. Every structure has it's own harmonic resonant frequency, and that frequency changes due to weight, etc. So, for the heck of it I changed the engine gear ratio from 1 to 1.04 (not much huh?)
The oscillation went away- the plane is steady as a rock. Put the gear ratio back to 1 and the harmonics cause a problem again(one of the reason car engines have "harmonic balancers")
My hats of to MH and Mighty- that's one IMPRESSIVE physics engine. How come they aren't working for NASA? 
FSIC Messageboard
UBBFriend: Email This Page to Someone! 
posted 08-12- 02:56 AM
posted 08-12- 10:31 AM
posted 08-12- 11:53 AM
posted 08-12- 02:24 PM
