The Florine No. 2 tandem helicopter sets a flight endurance record
Wednesday, October 25, 1933
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Description
The Florine II was the second iteration of an innovative tandem rotor design that used canted rotor hubs to offset the net torque from the two rotors, which operated in the same direction. Source: "Nicolas Florine Tandem-Rotor Helicopter", Ken Bartie, VFS 2019 VTOL History Calendar
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