Could there be a more perfect 1951 Mechanics Illustrated article than "Helicopters for Everyone," which promised a vehicle thus, "The third model has corrected some of the above mentioned faults. The engine now is slung under the seat directly beneath the center of gravity. This warms the pilot in cold air and improves the machine’s balance. The model at present is being tested. There still remains, however, the sense of insecurity—of riding a flying swivel chair with no visible means of support. Pentecost and his associates are perfectly well aware of this natural reaction and have planned a weatherproof enclosure for the machine."
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