
Full-scale working mock-up of the Hughes XH-28. The follow-on to the XH-17, the XH-28 is a four-bladed flying crane design with an empty weight of 52,000 lbs and with a gross weight of 105,000 lbs is the first helicopter designed to have a gross weight of over twice its empty weight.
From Vertiflite, May/June 1975.
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