12/31/2010. Remarks by Johan Visschedijk: "One of the most innovative single-seat fighters of the 'fifties, combining the then latest developments in aerodynamics and hydrodynamics, the Model 2 Sea Dart was designed to meet a requirement for a seaplane fighter capable of Mach 0.95, but was expected to achieve Mach 1.5.

Utilizing a blended hull and hydro-skis, two prototype Sea Darts were ordered on January 19, 1951, under the designation XF2Y-1 and the BuNos. 137634 and 137635. Twelve production examples were ordered on August 28, 1952 as F2Y-1s (BuNos. 135762 to 135773), later the first four were redesignated YF2Y-1s, and another four F2Y-1s (BuNos. 138530 to 138533) were added.

The Sea Dart was intended to be powered by two Westinghouse XJ46-WE-2 turbojets each offering 6,100 lb (2,767 kg) st with afterburning, but the first XF2Y-1, which flew on April 9, 1953, had two 3,400 lb (1,542 kg) st Westinghouse J34-WE-32s. Severe vibration of the hydro-skis while taxiing and poor high-speed performance led to the cancellation of one XF2Y-1 (BuNo. 137635) and all F2Y-1s.

The power output forecast for the XJ46-WE-2 intended for the Sea Dart failed to measure up to expectations and indicated that a max speed no higher than Mach 0.99 was likely to be attained. The XF2Y-1 was initially flying with J34s and was later retrofitted with J46-WE-2s which also powered all three remaining YF2Y-1s. Limited trials were continued until 1956, when the entire program was abandoned. Fate of the individual (completed) aircraft:

137634 XF2Y-1: 135762 YF2Y-1: 135763 YF2Y-1: 135764 YF2Y-1: 135765 YF2Y-1:

stored at NASM's Paul E. Garber Facility, Suitland, Maryland, USA. written off on November 4, 1954. on display at San Diego Aerospace Museum, San Diego, California, USA. never flown, on display at Wings of Freedom Museum, NAS Willow Grove, Pennsylvania, USA. never flown, previously displayed at Seattle, Washington, presently at Florida Air Museum, Lakeland, Florida, USA."