Am 17.01.10 01:16, schrieb Jim Logajan:
Wrong how? Note that they first write "Speed-to-fly refers to the optimum
airspeed for proceeding from one source of lift to another."

Yes, and that's wrong. Speed to fly is not the optimum speed to reach
the next thermal but rather to reach the target altitude in in that next
thermal. Otherwise, there would be absolutely no reason why you should
care about the strength of the next thermal.

You might argue that this is included in the word "proceeding", but I
doubt it, and even if it were, then that's certainly not clear enough
for somebody who has to ask.

Others use the term similarly, e.g.:

You can cite as many authors as you like, if they copy their errors from
each other.