Ask the instructor what IAS should be flown with a wind that
is 50 knots? Then do a wind triangle and try the same
calculation with higher IAS. Personally I would fly
zero-wind at best glide plus 5 knots, that allows some
recovery if there is a need.

Also, ask the instructor to explain his theory of the best
glide with a dead engine and how that compares to a glider.
Also ask why gliders often use partial speed brakes on
approach?



"Peter Duniho" wrote in
message ...
| "Darkwing" theducksmailATyahoo.com wrote in message
| ...
| It has been a while since this happened, but my
Instructor when I was
| going for my PP-ASEL told me 70 was best glide in the
C172 but I knew the
| manual said 65, I showed him it one day and he said he
was wrong and glad
| I pointed it out. So if you show him info "from a higher
power" he will
| listen.
|
| The problem here is that the POH for the Cessna 172 does
not (as far as I
| recall) discuss adjusting best glide airspeed for wind.
This isn't a
| question of using the wrong data for the airplane, but
applying the
| published data incorrectly.
|
| There are other "higher powers" to refer to, but in this
case, Nik already
| tried showing the instructor one (the "Glider Flying
Handbook"...an FAA
| publication, I assume?), and the instructor didn't accept
that as a valid
| reference.
|
| Pete
|
|