I'm building a 3 meter nnP-39.
I just follow the design from Nerdnic but had to adjust because of the size.
The engine will be a DLE120 with a 28x10 prop. It is a gas engine which works wel on foam
It must be transportable
The wings have two wooden spars and can be split for transportation.
The wings are filled with polyurethane foam. Bit tricky to do but the result is amazing.
I will keep you posted!
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