Rolls-Royce RB.106

First run in 1953, the Rolls-Royce RB.106 was an advanced military turbojet engine by Rolls-Royce and was sponsored by the Ministry of Supply.

A two-shaft design with two axial flow compressors each driven by its own single stage turbine and reheat, it was of similar size to the Rolls-Royce Avon, allowing it to be used as a drop-in replacement, but it would have produced about twice the thrust at 21,750 lbf (96.7 kN). The two-shaft layout was relatively advanced for the era; the single-shaft de Havilland Gyron matched it in power terms, while the two-spool Bristol Olympus was much less powerful at the then-current state of development.
Apart from being expected to power British aircraft such as those competing for Operational Requirement F.155 it was selected to be the powerplant for the Avro Canada CF-105 Arrow. However funding was cut with the 1957 Defence White Paper which terminated most aircraft development then under way. The Arrow moved to an indigenous two-spool design similar to the RB.106, the Orenda Iroquois.

A scaled-up version of the RB106 intended for F.155 was the Rolls-Royce RB122. The RB.106 project was cancelled in March 1957, at a reported total cost of £ 100,000.

RB.106
Type: Two-shaft turbojet
Compressor: axial flow; LP followed by HP
Turbine: axial flow; HP single stage; LP single-stage
Maximum thrust: 21,750 lbf (96.7 kN)