I'd suggest that there will likely be far more diagnostic and analytical information available for the F135 (and probably actual flying hours) by the time that Canada comes to the F-35.
Something will have gone horribly pear-shaped if there isn't. Actually I don't think a single engine is an automatic disqualifying factor for the RCAF mission these days
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And of course the Arrow had twin engines for speed, range and weapon capacity, all well in excess of many contemporary fighters. Arrow and J-20 are an interesting comparison - maybe the Canadians should invite a bid from Chengdu?
