Curtiss Jenny Restoration

Welcome! We hope you enjoy following the restoration process of a 1918 Curtiss JN4D Jenny. Once completed, the aeroplane will be flown and displayed at the Candler Field Museum in Williamson GA (30 miles south of Atlanta). You can contact me below by clicking on "VIEW MY PROFILE"

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Location: Peachtree City, Georgia, United States

Tuesday, January 18, 2011

Throttle

I did a lot of thinking recently about the throttle linkage. Originally, the OX-5 Jenny had a solid pushrod arrangement from the throttle in the cockpit to the carburetor. But the Hisso carburetor is above the engine so that set up would not work.

Glen and I discussed making a bell crank system using pushrods. See, the throttle arm pulls the rod rearward when you open the lever. But the carburetor needs the rod to go forward to open the throttle. One bellcrank was needed to reverse direction. The other was needed to get the arm high enough to reach the carburetor on the top of the engine. Plus, the fuel tank was obstructing the pushrods and the entire thing became one big headache.

So, pardon me but I decided to go with a flexible throttle cable. You won't be able to see it from the cockpit, but it is there.

First thing was to start building the brackets. I used some .090 steel cut on the bandsaw.



Here is the bracket holding the end of the cable in place. The throttle is on the right.



The cable snakes its way to the carburetor where I made another bracket. The cable is clamped to the bracket providing leverage and stability. You can see the throttle arm to the right. The same bracket will hold the mixture cable too.



Here are the brackets after a coat of primer.



Had a visit from my good friend Gordon Clement today.



Gordon is a fellow Bucker pilot. He owns probably the most recognizable Bucker in the United States, the Jungmann once owned by airshow pilot Jim Moser.



Gordon (pictured here with his son Zack) lives on the north side of Atlanta.



That's it for today. Expect another Jenny update around the weekend.

Cheers

Brian

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