Hi Matt,
I will be sticking with balsa skins.
If the skins are stiff enough I can lighten the foam cores more.
Then once built I will/should have stiff wings.
The issue with these thin bipe wings is not really that of load carrying.
Resistance to twist is what I'm after.
I have read your derivative thread.
I also taper skin thickness to the tip - you don't miss many tricks !
I'm hoping to pull a little chord-wise curve in the skins while applying the veil to the inside.
Based on your thread the internal applied veil will weigh approx 15g so say 20g for both wings.
The veil itself will weigh 10g.
I estimate the foam cores at 63g to 85g per panel depending on foam used - will be either 15Kg/m\3 or 20Kg/m\3.
Using the 15Kg variety the total for cores will be 250g.
Removing ; 30% = 75g - 50% = 125g
I will remove at least 30%. - but because of the mount system/ boxed lay-out of the bipe wings (ie the model in the middle and then the out-rigger struts working in both tension and compression) I should get close to 50% out.
The plane will not only be electric it will be contra driven- no vibes,torques, or asymmetric thrust issues to deal with - just flight loads as applied.
Perhaps you could check my inside applied veil weight estimates in case I got you wrong !?
I will do test samples anyway.
Thanks again.
Brian