Hiller ramjet powered flying crane

boxkite

boxkite

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I'm looking for a model number of "this huge model of a ramjet powered flying crane, proposed in 1951, evidenced Hiller's belief that larger helicopters should ultimately be powered by tip jets" - so tells the caption in John F Straubel's book "One Way Up".
 

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This one?
 

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I've only ever known this one as the "Heavy Lifter" and would also love to know its proper model number...
 

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