Shinden by Bryan Hebert (Photo credit: Wikipedia ) Hi all, I came across this spreadsheet containing rough estimates of common building materials used for scratchbuild of RC airplanes . Use it, don't use it. Here it is. What it doesn't have, is a updated list on LIPO batteries and common brushless motors but besides that it's pretty decent. Enjoy! Click the link below: https://docs.google.com/viewer?url=http%3A%2F%2Fwww.flyelectric.ukgateway.net%2Fweights.xls