The empty engine mounts of the world's largest flying boat still gaped last week like empty tooth sockets. But in the well-guarded assembly building at the great Martin aircraft plant at Middle River, Md. the four 2,000-h.p. Wright Duplex Cyclones that will drive Glenn Martin's "No. 170" were on hand; so were the huge props. It would not be long before Martin's 170, called by the Navy XPB2M-I, would be ready for her first trip aloft.
To airmen who had seen Douglas' gigantic, 82-ton 6-19 (TIME, April 28, July 7) the 70-ton Martin...
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