WFC 111 Lecture 10: Lecture 10-10/12

• School: UC-Davis
• Department: Wildlife, Fish, and Conservation Biology
• Course: WFC 111
• Professor: Eadie John

Document Summary

Profile drag: caused by friction; proportional to size of surface. Induced drag: caused by vortices at wing tips. Profile drag: caused by friction; proportional to surface area. Solution: reduce surface area relative to body weight. But: lift is also proportional to wing surface area (therefore limits) Alula: helps to maintain laminar flow at low speed. Low loading: more maneuverable, less power needed to sustain flight. Low aspect ratio: wide, short wings; short, powerful flight. High aspect ratio: long, narrow wings; gliding, soaring flight. Wing loading & aspect ratio **** study for exam! Elliptical: short rounded; low aspect, low landing. High speed: pointed; high aspect, low loading. High speed in open, long distance, endurance. Soaring- long & narrow; high aspect; med. Flapping: thrust and lift on downstroke, life on upstroke. Gliding: use weight to overcome air resistance; lost altitude. Soaring: maintain or increase altitude; passive (thermals) or dynamic using wind gradient over ocean.