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

Thursday, January 15, 2009

Seat support vertical pieces

Today's project was figuring out the vertical pieces that support the seat rails. Each vertical piece is notched to fit the rail. Now - the tricky part - the vertical piece is not perpindicular to the rail nor the lower longeron! No 90 degree cuts here. They actually angle inwards. So, you have to make the cuts about 4 or 5 degrees from square.



To save weight, the center of the vertical is removed until 3/4 in. thickness is achieved. The bandsaw and spindle sander took care of this.



I also planed and cut the front seat supports. The rear ones were original, so I had a good pattern. They were 1 1/2 in x 3/4 in. stock. I have to shape the leading edge yet, but that's to come later.



There's a pulley system in the Jenny control system that operated the ailerons. This 3 3/4 in long block was made to accomodate the forward pulley. It is here where the aileron cables make a turn and exit the fuselage.



Now, the fun part. The rear vertical supports must attach (at the bottom) to the floorboard supports and the top bolts to the rail. No real issues here.



But, the forward verticals attach to the floorboard supports also at the bottom, but the top is somewhat different. I have seen two ways of making this vertical. The first way I saw on two different Jennies. The vertical piece was cut flush with the bottom of the rail. Then a long bolt that holds the pulley I mentioned earlier goes through the rail and holds one side of the vertical in place with an l bracket. There is nothing holding the other side. You can see that below in the Golden Age Air Museum's Jenny.



The other method was seen on a Jenny displayed at the Naval Aviation Museum in Pensacola FL (picture below). The location of the vertical was not critical of the pulley and mirrored the rear vertical in shape. It was held in place by a bolt through the rail.



Both examples are authentic. After much measuring and figuring, the Navy method seemed to fit this restoration best. That way, I could attach the vertical to the floorboard support without worrying about the pulley bolt.


More this weekend. Till then...
Brian

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