RE: Extra 300 Prototype #2
As an experiment I used Gorilla Glue (Polyurethane) to sheet the rudder. I usually use epoxy and the vacuum bag, but I have heard that you do not need to pre join the sheets if you use Polyurethane. If this works it will be a big time saver.
As with bagging any part, cut the sheeting to be only slightly larger then the part, otherwise the bag will crush the wood. Also make the sheeting into a "book" by taping the trailing edge together. so you put a rudder sandwich into the bag.
Make sure the shuck that is marked down is on the bench as Dennis has made sure this shuck is true. The shuck is outside of the bag. Then the breather cloth and release cloth is placed in the bag, and the rudder is placed on top of the cloth. The vacuum is then pulled down. I keep the top shuck and a bit of weight on top to help hold everything in place. This is not needed once the vacuum is pulled down.
As for the need of the caps, I have always wondered why Dennis puts them in, but followed the his steps as I felt everthing would be an 1/8 of an inch off if I left them out. (1/16 top and 1/16 bottom.