This was the last time I flew my glider in the mountain in 2012 after that I moved to another country and I couldn't fly for about 3 more years. Until I started to do the hobby again and started this ...

Ideally, an aircraft would be made of something reasonably strong, light, and weather resistant. Cardboard, is none of those things. But that did not stop [PeterSripol] from building an ultralight ...