The Republic RC-3 Seabee is an all-metal amphibious sports aircraft designed by Percival Spencer and manufactured by the Republic Aircraft Corporation.

In order to meet the anticipated postwar demand for civilian light aircraft, Republic endeavored to build the Seabee as inexpensively as possible, while still retaining reasonable performance and range. A lot of thought went into eliminating what were at the time termed as 'airplane frills,' resulting in a strong product built with as few parts as possible. For example, Seabees as built did not have ribs in the wings; instead, the heavy corrugated aluminum sheet which formed the skin provided the necessary stiffness. Republic was also willing to buy components in volume, which lowered costs further.

23 Seabees were converted to a two-engine variant known as the United Consultants Twin Bee with the fitting of two wing-mounted engines driving tractor propellers. The added thrust greatly enhanced the plane's speed, acceleration and capacity.

Modifications to increase the engine size, wingspan, cargo carrying capacity, controls, trim activation, environmental systems, landing light and many others have been available since the early 1970s.