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"The engine was tested in 1959 and 1960," said Sipe. "And it surpassed all of their expectations. Actually, that engine ran flawlessly." The Iroquois set performance records that wouldn't be broken until the United States introduced the SR-71 Blackbird in the mid-sixties.
originally posted by: Zaphod58
a reply to: Trillium
The SR-71 was an offshoot of the A-12, which was already selected by the CIA in 1959, which was the same year the Arrow was cancelled.
The J75 had a dry thrust of 76.5 kN (7,800 kgp / 17,200 lbf) and an afterburning thrust of 109 kN (11,110 kgp / 24,500 lbf). The Iroquois was the most powerful engine in North America, with a dry thrust of 82.4 kN (8,400 kgp / 18,500 lbf) and an afterburning thrust of 115.8 kN (11,800 kgp / 26,000 lbf). It had an unprecedented 5:1 thrust-to-weight ratio, achieved partly by extensive use of titanium. The Iroquois was ground-tested in 1955. In 1957, the US Air Force loaned a B-47E Stratojet bomber to the Canadians for a flight-test platform. The engine was bolted to the side of the aircraft, near the tail; the lopsided bomber was apparently something of a handful to fly. Some snags were encountered in testing, but in general the engine development effort went well. The Iroquois was removed from the B-47E after the completion of trials, and the bomber was returned to the United States. However, apparently its airframe had been warped by the asymmetric thrust of the Iroquois, and the aircraft was scrapped. Interestingly, this particular B-47E was the only American strategic jet bomber that was ever operated by a foreign country.