The Harpoon Navy Land-Based Bomber: Lockheed Aircraft Corp. is now building the twin en-gine PY2-4 Harpoon bomber, a Navy-designed version of the company's Ventura PV-1. The Harpoon is called a substantial improvement over the Ventura, which was an older AAF plane. In outward appearance the two planes are very similar, but increased firepower is evident on the Harpoon.
source: Aviation Week | Zetu Harrys Collection
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