Originally Posted by AvB
I haven't had much time or motivation for building lately (and it's so damn hot there's not a lot of attraction for being in my steel un-insulated shed) but I do hope to have another go at this soon. The light PU winged Scratcho, with the tips cut off, is amazingly good and I've been flying it a lot! I want to make another wing using a mylar splitter plate between the mould halves while the PU expands, then crack it open, scrape out the PU around the edges and put some expanding epoxy in there, then close the mould again.
And I'd like to take some bits of video of the steps to (hopefully) show that it's not rocket science ... definitely back shed stuff, but capable of making a brilliantly light, very tough wing in a very short time.
Cool, what was the 3ft lbs of the foam that you used for the wing?
I was thinking of using 5 - 8lbs foam it since it has a longer work time but use them to make foam blocks out of for CNCing
Sounds like moisture is a big issue in the foams expansion