My Wooden Airplane
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3/3/2013 - 3/15/2013

Throttle and Mixture, Part 1

Since my engine is located so close to the firewall, I had to mount the carburetor "backwards" from a "normal" installation. Because of this, the throttle lever is "reversed", meaning forward is closed, rather than being open. I decided to tackle this by making some "reversing bellcranks". This way, moving the throttle forward on the instrument panel would cause the lever to move backward on the carburetor, which would result in full throttle.

The problem with this set-up is that there is too much friction in the cables between the instrument panel and the bellcranks. In theory, the cables can withstand a bend radius of as little as 5 inches, but turn that bend into a slight "S" curve like I have here, and their performance starts to deteriorate badly. In the end, I'm going to have to take these out and start all over again. I will have to use longer throttle and mixture cables and approach the carburetor from the front in order to get the motion right AND not have too much friction.

I put Part 2 of the Throttle and Mixture under the Engine section.
If you'd like to check it out, you can go here.

Total Time: 20.0 hrs.