17 Avro CF-105 Arrow Mk. 2
In late 1958, the Mk. 2 Arrow was ready for taxi tests to break in the new engines. The two Pratt & Whitney J75 turbojet engines of the Mk. 1 were replaced by the Orenda PS.13 Iroquois engines. The engine was similar to the Rolls-Royce RB.106, using a two-spool layout with low-pressure and high-pressure sections of the compressor for added efficiency. This design made it more powerful than the British design, especially in afterburner. In order to improve simplicity and reduce weight, Orenda (a part of the Avro Canada group)) pioneered the use of titanium in the design of the engine. The engine was thought to have weighed 850 pounds (386 kg) less than if steel had been used. The engine could produce 19,350 pound-force (86.1 kN) without afterburning and 25,600 pound-force (114 kN) with afterburning.
In this image, you can see the new Iroquois engines installed on RL-206. The Iroquois engines were much longer than the J75 engines (19.5 ft to 13 ft) but due to their lower weight, the internal structure could be reduced. No significant external fuselage alterations were necessary. Note the different exhaust design from the J75 engines and the lack of the red Day-Glo paint.
17 Avro CF-105 Arrow Mk. 2
In late 1958, the Mk. 2 Arrow was ready for taxi tests to break in the new engines. The two Pratt & Whitney J75 turbojet engines of the Mk. 1 were replaced by the Orenda PS.13 Iroquois engines. The engine was similar to the Rolls-Royce RB.106, using a two-spool layout with low-pressure and high-pressure sections of the compressor for added efficiency. This design made it more powerful than the British design, especially in afterburner. In order to improve simplicity and reduce weight, Orenda (a part of the Avro Canada group)) pioneered the use of titanium in the design of the engine. The engine was thought to have weighed 850 pounds (386 kg) less than if steel had been used. The engine could produce 19,350 pound-force (86.1 kN) without afterburning and 25,600 pound-force (114 kN) with afterburning.
In this image, you can see the new Iroquois engines installed on RL-206. The Iroquois engines were much longer than the J75 engines (19.5 ft to 13 ft) but due to their lower weight, the internal structure could be reduced. No significant external fuselage alterations were necessary. Note the different exhaust design from the J75 engines and the lack of the red Day-Glo paint.