My best build was a low wing with 2,200 square inches of wing surface. I flew it with a Super Tiger 4500 with a 22"x10" Zinger and ACP props.
It flew like low wing trainer but did "make" just over 100 mph at full throttle.
Weight 22 pounds.
The balsa for the 89" wing with 22 1/2" "cord" cost just over $200.00.
It now hangs from the ceiling in a liquor store in PG. Big Blue.