Mike,

At this time, the only animations that FS deals with are based on a parts pivot and that pivots rotation (around its x,y,z axis) or translation (movement of the pivot in 3d space from position a to position b). Keyframes are nothing more than markers or waypoints, so to speak.

The l_flap and r_flap names use a builtin interpolation of the rotation of the flaps x axis based on time and degrees in the aircraft.cfg file. More complicated motions require the l_flap_key and r_flap_key or l_pct_lead_edge_flap and r_pct_lead_edge_flap or l_pct_trail_edge_flap and r_pct_trail_edge_flap names which can include translation of the pivot point. These are described in the MakeMdlSDK.

Lou