RE: How much strength does balsa / ply add?
Hi Jose,
I ma used to this type of construction. Like I said, my AW Extra 300 30cc is similarly built and my Phoenix Topstar is mostly frame only. But both these have strong stringers additionally to stiffen. There is none of that here.
Wait out a bit, I will post some more pics, that will make it a bit more clear
Ameyam