here's where the "in line " concept changes however, determining if the flap is up or down when the servo arm is in line with the rod ... if the controll horn for the flap is on the bottom of the flap, then yes, the linear set up can be of mechanical in holding the flap retracted .. the oposite is the cais in the event the linkage horn on the flap is above the flap hinge line ( Like in the case of somehting like a kingcat, bobcat, or in this case an internal set up on the Firebird) .... The only way to get aorund this would be to use a ball link and drive the servo arm to the oposite direction, and that would be especially the case if using 180 deg travel ... I do not like ball links as they do not center the force on the servo arm, but thats another issue ....

Voy