Brief Description: Wright-Hanka Roll Trim Spring 1
While doing other jobs I thought I'd build the spring for the roll trim. I'm using the Wright-Hanka system that a few other canards have done with sucess. Mine will be an electric trim operated from a hat switch on the control stick. There will be a servo pulling and pushing the roll pushrod with one of these horse-shoe shaped springs inbetween.
I thought I'd try it in carbon fibre as I had a small amount of cloth. First up I found a bit of pipe and hot glued it to a board after taking out a bit on the bottom leaving a curve around 270 degrees. Then I covered everything in duct tape and added some clear tape around the base as you see in pic 1.
I did a six ply layup initally and peel plied it. Then I added some aluminium tube that I had drilled out to accept an AN3 size bolt. I did another 5 plys on one side about an inch long with a bit of flox for a transition. Once cured I did the other side using a mixing stick spacer and a couple of clamps and more peel ply. All this done as shown on Pic 2.
Pic 3 has my springs which look even nicer in person! I only needed one at 5/8" diameter. I've cut one down to .8" and have a thicker and thinner as spares. I made the initial mold wide enough to do a few as it was really the same amount of work as one. It feels great and nice and spingy. I'm pleased with this, the carbon is very pretty.
