The Allison J35 was originally developed by the General Electric Company in parallel with the Whittle_based J33, and was the Air Force's first axial-flow (straight-through airflow) compressor engine.
The J35 first flew in the XP-84 in 1946. Late in 1947, complete responsibility for the production of the engine was transferred to the Allison Division of General Motors. More than 14,000 J35s had been built by the time production ended in 1955.
The J35 was used to power the X-5 variable-sweep research aircraft and various prototypes such as the XB-43, XB-45, XB-46, XB-47, XB-48, and XB-49. It is probably best known, however, as the engine used in two of the Air Force's leading fighters of the 1950s, the F-84B/C/D/E/G "Thunderjet" and the F-89 "Scorpion."
The B-47C was the initial designation for a design project initiated in January 1950 to redesign the aircraft for four Allison J35-A-23 turbojets in place of the six General Electric J47s.
The original Allison J35-A-23s turbojets had estimated performance of 9,700 pounds thrust each at maximum power (with afterburners) and a normal power rating of 8,200 pounds thrust each.
The actual J35 performance was no where near the estimates (about 7,400 pounds maximum power and 5,600 pounds normal) so alternative engines were proposed.
The AllisonJ35 was originally developed by the General Electric Company in parallel with the Whittle-based centrifugal-flow J33, and was the Air Force's first axial-flow (straight-through airflow) compressor engine.
The J35 was fairly simple, consisting of an eleven-stage axial-flow compressor and a single-stage turbine.
The J35 was used to power the X-5 variable-sweep research aircraft and various prototypes such as the XB-43, XB-45, XB-46, XB-47, XB-48, and XB-49.
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