First helicopter of Landgraf Helicopter Corporation developed in 1944. Bought by the USAF for testing in 1948; however, the aircraft crashed in the testing and the pilot was killed. The project was halted following the incident.
For further details on the design and development history of the aircraft see,
Source: “Landgraf Helicopter Co. Model H-2 Lateral-Twin Helicopter”, Ken Bartie, VFS 2019 VTOL History Calendar
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