"Anti-Blackout" Flying Suit, Munsingwear, 1945
Caption attached to photo from the Minneapolis Tribune:
THE ANTI-BLACKOUT FLYING SUIT is modeled here by Kenneth R. Larson (center), 5153 Thirtieth avenue S., Munsingwear industrial engineer, and Charles W. Pauly, 165 Peninsula road, Munsingwear mechanical engineer. At right, Frances Balck, 3028 Fremont avenue S., helps zip up the suit for Larson while Pauly “blows up” the gear.
Towards the end of World War II warplanes were getting fast enough to put significant g-forces on the pilots. G-suits like the one above would allow pilots to stay alert and conscious as the gravity forces would try to force the blood away from the pilot’s head during high-g maneuvers. The g-suit would put pressure on the legs and abdomen, restricting blood flow away from the brain and eliminating the possibility of the pilot “blacking out” during flight.