However, they were disappointed that the wings did not produce enough lift, so they built a wind tunnel and experimented with hundreds of wing shapes until they found the ideal shape, size, and angle.
Niisiis ehitasid nad aerodünaamilise toru ja eksperimenteerisid sadade erisuguste tiivakujudega, kuni avastasid, millise ristlõike, suuruse ja nurgaga tiivad on sobivaimad.