ORIGINAL: pimmnz
....Your Reynolds might be good at 5 m/s, but I bet he wants to go a bit slower than that...If the object is to fly this thing indoors, then perhaps the questions he needs to be asking is how to build the thing really light, with adequate strength....
Well according to the figures provided, the stall speed is going to be about 4.8m/s so he's not going to be able to go much slower! I'm with you on reducing weight... for indoors anyway.