Airfoil Shape: Eppler 423 Selected for high coefficient of lift at relatively low speeds
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Transcript of Airfoil Shape: Eppler 423 Selected for high coefficient of lift at relatively low speeds
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