The Navy-designated prototype XF3B-1 still had the tapered wings of the F2B for instance, but was built as a single-float seaplane using the FB-5 undercarriage.

However, the growing use of aircraft carriers took away most of the need for floating fighters, and by the time other test results had been taken into account, the production F3B-1 (Model 77) had a larger upper wing that was slightly swept back and a redesigned tail with surfaces made from corrugated aluminum.

[2] It also eliminated the spreader bar arrangement of the undercarriage and revised the vertical tail shape.

[2] The aircraft remained in first-line service to 1932 and were then retained as "hacks" (command and staff transports) for several more years.

[3] Data from The Complete Encyclopedia of World Aircraft [3]General characteristics Performance Armament