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Elevator Bell Crank

October 5, 2013

I was doing a lot of traveling this week, but I did manage to sneak in a few hours before I left.  The elevator bell crank takes the forward and aft motion of your stick inputs and elevates the motion so that it is higher up in the fuselage and it also amplifies the motion a bit so that small inputs are translated into longer strokes.  The bell crank sits just aft of the baggage compartment.

You start off with 3 seperate pieces (that I forgot to take a picture of), but I did take a classy picture of the planes that show the 3 pieces and the completed assembly.

2013-10-01 20.30.04You of course being highly observant are saying to yourself “Hey!  There are 4 pieces there, not 3.  I hope he didn’t forget the 4th piece.”  No, I did not forget it.  I had to make that little spacer.  It took longer to find a piece of metal to use than it did to actually make it.  Some primer, 8 rivets and 5 days to wait to play with it and viola…you have a bell crank.

Now it is time to fit it in.  The directions are pretty easy.   A long bolt, a washer, a nut and two spacers that I had to make are all that are needed.  I assembled the parts and then make the spacer.  I slid it all together and here is the final look.

2013-10-01 20.23.37 2013-10-01 20.24.14The way it works If you look at the top picture, the pushrod that goes from the stick to the bell crank attaches at the bottom, which is on the right side in that picture.  The pushrod that connects the bell crank to the elevator horn connects at the top, which is on the left.  I’d show you what the final assembly looks like, but the directions are pretty clear. After you get the bell crank fitted and everything moves correctly, remove all the hardware and store it until later.  So now all the parts are in a little baggie in the attic.

Got my first web hit from the Kingdom of Saudi Arabia today.  Thanks for visiting.

From → Build Log, Fuselage

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