A major modification of the FR-1 Fireball, the Model 29
resulted from a Bureau of Aeronautics requirement for
a single-seat fighter combining a turboprop with a
turbojet. Assigned the designation XF2R-1 and later to
become known unofficially as the "Dark Shark", the
single prototype utilised the fifteenth FR-1 production
airframe and retained that fighter's J31-GE-3 turbojet,
mated with a General Electric XT31-GE-2 turboprop developing
1,700hp plus 227kg of residual thrust.
Although lacking the wing folding and the catapult and
arrester gear standard on the FR-1, the XF2R-1 weighed
473kg more than its predecessor when it flew
for the first time in November 1946. The XT31 drove a
propeller with four square-tipped hollow-steel blades
which could be fully feathered or reversed to zero blade
angle extremely rapidly, the drag of the flatter blade
angle serving as an effective air brake for landing. By
comparison with the FR-1, the vertical tail surfaces of
the XF2R-1 were enlarged to compensate for the
lengthening forward to accommodate the turboprop, but the airframe of the later fighter was similar in most other respects. The XF2R-1 underwent extensive testing
at Muroc Dry Lake, but no further development was
| Take-off weight||4990 kg||11001 lb|
| Wingspan||12.80 m||42 ft 0 in|
| Length||10.97 m||36 ft 0 in|
| Height||4.27 m||14 ft 0 in|
| Wing area||28.33 m2||304.94 sq ft|
| Max. speed||800 km/h||497 mph|
| Ceiling||11920 m||39100 ft|
The XF2R-1 underwent extensive testing at Muroc Dry Lake, but no further development was undertaken.
|Bill Clendenon, 30.01.2010|
Was the centerline of thrust located higher than the Fr-1?
Thank you very much.
Do you have any comments about this aircraft ?