Building on Grumman’s previous expertise with naval aeroplanes, the Avenger proved to be an excellent design

A good demonstration of Grumman’s patented ‘Sto-Wing’ concept, whereby the outer wing twisted as it folded. KEY COLLECTION

The TBF/TBM was an all-metal, mid-wing torpedo and level bomber designed for use from aircraft carriers or shore bases. It was large for a single-engined aircraft of the time but of conventional construction. The fuselage was a semi-monocoque structure built up from formers, longitudinal stringers and stressed aluminium alloy skin.

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