The Navy's VA(L) was to be a single-seat, single-engine attack airplane with an overload mission of 12 Mk 81 (500-lb) Snakeye bombs delivered at a radius of 600 nautical miles. Another key requirement was that it be "a modification of an airplane currently in the Navy inventory." The payload/range implied the use of the Navy's new TF30 engine.
Grumman considered proposing either a TF30-powered F11F or a single-seat modification of its A-6 Intruder with a single seat but the existing engines. The latter's size enabled it to easily exceed the payload/range requirement even though it did not have the fuel-efficient turbofan engine. Grumman decided to offer the A-6 derivative, believing that the low development cost and commonality with an existing airplane in the air group would trump the somewhat higher unit cost.
It didn't.
Picture courtesy Grumman Aircraft History Center


