Page Comparison

1. (more composite-condusive)

Rigid Spar

CNC cut core

• recesses for electronics/mounting points

• lips at recess edges to aid cover alignment

Skinning

Spar:

• carbon sheets

• aluminum plate

• basswood

Core:

• Foam

• Balsa

Skinning:

• composite fabric

• “Covering Film” (basically heat-shrink)

easier to build

• less hands-on experience required

• minimal tools required

Cost

• more materials/ CNC time required

Weight

• likely heavier due to less empty space

1. (old-fashioned RC)

Spars & Ribs

• mechanical locking features (notches)

Leading edge re-inforecement

• CNC cut or hand sanded

Skinning

Spar/Rib:

• Carbon Sheet

• Basswood

Reinforcement:

• Balsa

• Foam

• 3D Printed

Skinning:

• Covering Film

cost/weight

• less material required for similarly sized wing

Tricky

• delicate hands-on process requires certain skills and tools