Line up the two lines on the firewall with the back of the engine.

e.g if you mount the engine inverted the horizontal line will correspond to the line on the engine or the line formed by the mounting tabs.

The vertical line will then align with the engine's tick marks and/or the engine mount's center marks.


If you mount the engine on it's side, it's just the opposite.

Re: Servos

Wherever you wish to place them.

I used seperate servos for my left and right elevators, mounted in the fuselage. The right servo for the left elevator, etc.

You could also use a pull pull rigging and also mount the rudder servo in the fuselage. That's what I did.

My balance was spot on with an O.S. 1.20 pumped.

With a heavier engine, move the servos to the tail to offset the heavier motor.