This is how you beat the inverted spin record (on purpose)
from Air & Space Magazine
Flipped over and spinning: For most pilots, it's their worst nightmare. Not so for Spencer Suderman, who takes his lightweight Sunbird S-1x acrobatic biplane as high as he can go just to see how many inverted flat spins he can do on the way down. On March 20 over Yuma, Arizona, Suderman found out just how many. He spent 40 minutes climbing to 24,500 feet, but only two minutes, 57 seconds to careen down to 2,000 feet, completing a spin every 1.5 seconds for a record-breaking 98.5 spins.
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