Allison J71

The Allison J71 was a single spool turbojet engine, designed and built in the United States. It began development in 1948 as a much modified J35, originally designated J35-A-23.

Operational history
The Allison J71 turbojet powered the Douglas B-66 Destroyer and the McDonnell F3H-2 Demon after the failed Westinghouse J40 proved unworkable. The prototype P6M-1 SeaMasters were also fitted with the engine.

Variants
Data from: Aircraft engines of the World 1953
 * J71-A-1:
 * J71-A-2: Powered the McDonnell F3H Demon
 * J71-A-2B:
 * J71-A-2E: 9700 lbf thrust (14000 lbf thrust with afterburner), for the McDonnell F3H-2 Demon.
 * YJ71-A-3: 7000 lbf thrust (9500 lbf thrust with afterburner)
 * J71-A-4:Afterburning turbojet engines for the Martin XP6M-1 Seamaster flying boat prototypes.
 * J71-A-6:Afterburning turbojet engines for the Martin YP6M-1 Seamaster pre-production flying boats.
 * J71-A-7: 14000 lbf thrust with afterburner
 * J71-A-9: Powered the Douglas RB-66 Destroyer
 * J71-A-11: 10200 lbf thrust
 * J71-A-13: