So I thought I might write about exotic rocket fuels today to celebrate whatever SpaceX is or isn't doing yesterday, but then American commercial aviation decided to be the one to not to do anything yesterday. Besides, it turns out that the fluorine fuels --and who am I to turn down free clicks by talking about fluorine chemistry?-- were to go into the Dyno-Saur, which definitely deserves one or several Technical Appendixes when the time grows nearer. So I wrote about something else! Something also relevant! Air traffic control! How exciting.
If you are not a Canadian, (and why should you be?), it is probably hard to credit just how important the Avro Arrow is to our national psyche. John Diefenbaker, the Prime Minister who cancelled it, was the first "Prairie populist" to reach the PMO and is himself a bit of an unhealed wound in our national soul. This isn't a post about that. It's the introduction of a post about something else. (The Grand Canyon Mid-air collision, if you're too impatient to wait for the jump.) It is not inspired by the excellent Wikipedia article about the CF-105, from which this beautiful picture comes, but rather the accompanying article about the Orenda Iroquois engine that was to power it. That article is weirdly wrong, setting out a strange and counter-factual popular history in which the Iroquois engine was developed in secrecy and perhaps only adopted for the Arrow after the Rolls-Royce RB. 106 was cancelled, and whatever happened to the Wright J67, happened. Like the notion that Sputnik was a surprise, or that the Eisenhower Administration was functional, it belongs in a weird, alternate Fifties history, the kind that the Wright conglomerate would have written if it had decided to fail at literature instead of business. Both articles cite the same source, and it is certainly possible that the RB. 106 was favoured over the Iroquois at some point in development, but to say that the Iroquois was some kind of secret is just wrong.
"In 1954, the RB.106 program was cancelled, necessitating the use of the backup Wright J67 engine instead. In 1955, this engine was also cancelled, leaving the design with no engine. At this point, the Pratt & Whitney J75 was selected for the initial test-flight models, while the new TR 13 engine was developed at Orenda for the production Mk. 2s.[45]"
What do you even do with this? The J67 was just a licensed version of the Bristol Olympus! The Grand Canyon crash has not been obfuscated, but maybe it helps us understand the causes of obfuscation. In any case, it sure is relevant the day after the first national U.S. commercial air flight stop in 23 years. (NPR link to minimise the risk of link rot, in case the reader of five years has had it driven out by all the good news and happy occasions since.)





