What's In Your Windscreen?
Previous posts have talked about bullets, bird tests, and Canada Geese. I thought it would be interesting to put them in the perspective of energy impacting the windscreen.
E = 1/2mV^2
A 38 cal bullet weighing 7.1 grams at 300 m/s = 319K joules.
A typical test bird weighing 4 lbs (1814 grams) at 250 knts (128.6 m/s) = 15,000K joules.
A 15 lb Canada Goose (6800 grams) at 250 knts (128.6 m/s) = 56,229K joules.
Summary:
The four lb bird delivers 47 times the impact energy of the bullet!
The Canada Goose delivers 176 times the impact energy of the bullet!