My Wooden Airplane
Skip Navigation Links.

9/16/2011 - 9/18/2011

Elevator Bellcrank and Push Rod

The elevator bellcrank is a little bit different in the "dual stick" drawings than it is in the regular 14H drawings. The main difference is the point where the pushrod connects to it from the forward torque tube. In the bottom picture, I've connected the pushrod 2 inches away from the pivot point, giving me my 2:1 control ratio. Now the bellcrank moves 30 degrees in both directions, and with 3 inch throws to match the elevator control horns, this will translate into 30 degrees of elevator travel, as well.

Total Time: 9.0 hrs.