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

Wednesday, August 18, 2010

Throttle

I decided to figure out how I was going to hook up the throttle linkage yesterday. As you can see from the picture below, when you push the throttle forward, the arm moves backwards. This would cause a rod going from the throttle to the carburetor to "pull" rather than "push".

Sounds easy enough, right?



Not really. See the lever arm on the Hisso engine requires you to "push" forward to get full power and "pull" to get idle power. That's opposite from the throttle quadrant!

So, a linkage had to be engineered to reverse the "pull" to a "push".

First step was to make a plate out of some .065 steel and drill a few holes.



Then cut out and drill the lever arm.



Some welding...



The excess rod was then cut off until 1/2 in. remained.



The shaft is an AN5 bolt. Two little welds on the head of the bolt keep it from turning.



It was getting late by the time I reached this point, so I called it a night. You can get the idea from this picture. The arm holes need to be drilled yet.



Here is how the linkage reverser is going to mount. The rod from the throttle moves the bottom part of the arm backwards causing the upper part of the arm to push forwards.



Some days, things don't always go well. Earlier that day, I decided to check the old water temperature gauge we got for the project.



I boiled some water on the kitchen stove and submerged the bulb. Should read 212 degrees Fahrenheit, right?



The needle didn't move! Oh, well. Guess this one needs to be sent for overhaul.



Been pretty busy at work so I apologize for the long period of time between posts. More soon...I promise.

Brian

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