A large migratory bird has a roughly rectangular wing with an average chord c = 15...

 

Transcribed Image Text:

A large migratory bird has a roughly rectangular wing with an average chord c = 15 cm and span b= 1.5m. Its wing area is thus S=bx c, and the bird weighs roughly 4 kg. What is the average pressure difference Ap = P₁ - Pu between the bird's wing lower and upper surfaces while in flight? An efficient wing typically has an average lower-to-upper pressure coefficient ACp = Cp-Cpu of between 0.5 and 1.5. This bird is quite an efficient flyer, with ACp = 1.25. Estimate the bird's flight speed at sea level. At which speed does this bird need to fly if it needs to pass above a mountain range at an altitude of 4000 m above sea level? (Use the standard atmosphere to determine density at this altitude.) A large migratory bird has a roughly rectangular wing with an average chord c = 15 cm and span b= 1.5m. Its wing area is thus S=bx c, and the bird weighs roughly 4 kg. What is the average pressure difference Ap = P₁ - Pu between the bird's wing lower and upper surfaces while in flight? An efficient wing typically has an average lower-to-upper pressure coefficient ACp = Cp-Cpu of between 0.5 and 1.5. This bird is quite an efficient flyer, with ACp = 1.25. Estimate the bird's flight speed at sea level. At which speed does this bird need to fly if it needs to pass above a mountain range at an altitude of 4000 m above sea level? (Use the standard atmosphere to determine density at this altitude.)

Answer rating: 100% (QA)

SOLUTION 1 To calculate the average pressure difference Ap Pi Pu between the birds wing lower and upper surfaces while in flight we need to use the following formula Ap 12v2Cpu Cpl where is the air de... View the full answer