Depron ribbing

[Blackbird]

Is ribbing with depron a good idea? I dont have any balsa and I think thats what I need to do.
Anyway, does a depron wing even need ribbing? It's 5 foot long

 

[Craftydan]

Spar, yes.

Ribbing, maybe, but probably not. All depends on how well you want it to hold it's shape and whether you're going to cover it or not, and with what. With a rigid spar and a reasonable cord width, the airfoil should hold it's shape against wind pressure. It can still be crushed in handling, which covering or a few well placed thick ribs (hardpoints for you to grip or tiedowns) can help.

 

[Blackbird]

Thanks for telling me a spar would work too.