Next step in my spar test is to layout the spar caps.

I first built a nifty UNI tape dispenser which will get a bit of use with CS spar, two wings and the canard to do.

It took 4 hours to layup only 20″ of this tape! The key thread of each piece needs to be teased out which then will release all the cross fibres which need careful pulling out. The tape then lies down beautifully.

It needs some attention to get the tapes in the correct direction so the threads are accessible for pulling out. I made a 3″ wide squeegee which was the heart of the technique for wetting out the cloth along with a heat gun.

My practice piece simulated the various thicknesses so that I could later workout how many plies I need to fill the CS spar troughs. This is important as we go from full length to shorter ones so it MUST have the right number to start with that go all the way.

UNI Tape dispenser

Cap weights

Results