Originally Posted by
asgelle
How was it measured?
Yes, they were measured on treadmills and wore face masks. They ran up a 11% incline at 22 mph for 5 min.
What fascinates me are the wind tunnels built for high altitude bird physiology research. The O2 concentration and temperature are lowered to simulate high altitude and the bird flies in place, watching the Spinerval entitled, "DC-10 Wheelwell Stowaway."