XHJD-1 Whirlaway (McDonnell 1946)
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The XHJD-1 Whirlaway, built in 1946 for the Navy, was the world's first twin-engine helicopter. It weighed six tons.
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XHJD-1 Whirlaway (McDonnell 1946)
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The XHJD-1 Whirlaway, built in 1946 for the Navy, was the world's first twin-engine helicopter. It weighed six tons.
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