Look at it another way, and this is a rough explanation.
And some assumed parameters:
Cruising at 470 knots TAS
300 nm to climb to cruising altitude, then descend to destination.
50 knot westerly winds at cruise. (likely more than that, but we'll go with a worst case scenario)
is 5574 nm, subtract 300 miles and you are 5274 nm at cruise. At 470 knots TAS
- 50 knot headwind is a 420 knot ground speed. Time in cruise is 12:33. This was achieved by AC
, in a regular B767-300ER in all but ~3 times.
is 6217 nm, subtract 300 miles and you are 5917 nm in cruise. At 470 knots TAS
+ 50 knot tailwind, is a 520 knot ground speed. Time in cruise is 11:22.
is roughly an hour quicker than YYZ
, of which the B767-300ER was capable. That is why I think if AC
was able to fly YYZ
, then ET
should have no problem flying YYZ
Just because I stopped arguing, doesn't mean I think you are right. It just means I gave up!