Airfoil Shape: Eppler 423• Selected for high coefficient of lift at

relatively low speeds• 32 balsa wood short ribs, 6 long ribs

to support flaps and ailerons

Wing Construction Method• Ribs cut from 3/32 in. balsa sheets• Laser cutter used to ensure precision• Ribs were attached to 4 spars of various

dimensions• Ribs were glued to leading edge, trailing

edge, mid-chord spars to give wing rigidity and strength

• Webbing used to join mid chord spars for additional strength

Engine• O.S. .61FX with E-4010 MufflerFuel Tank• Great Planes Fuel Tank 12 oz.Propeller• Wooden 13x5 Propeller

Engine Cowl• Constructed using balsa sticks and

sheets glued together and shaped with sand paper and files

• Decreases the blockage area from the front of the plane

• Increases airflow across the engine

Wing Covering• 1/16 in. balsa wood sheets sprayed with

ammonia/water mixture and curved around the leading edge

• The entire wing was covered in Monokote which is a plastic type shrink wrap that allows complex curves to be covered

Stress analysis in Solidworks

Wing design in Solidworks