ok.. I may be backwards... I don't normally define the use of Q settings..

The bottom line is, the discussion was brought up with the AF T-Bird doing
acro and not computing the altitude needed at the top of a maneuver to
safely pull out above ground level. Some argue to set the altimeter to zero
elevation before takeoff. It just can't be done in many places out west.

Many glider pilots along the coast use the same tactic, always knowing their
height above the local airport they departed from, but not the local ridges.
And if they are going cross country.. they are really going to be doing some
mental math.

Bottom Line? set the altimeter to local field elevation, not sea level

BT

"S Green" wrote in message
...
Sure you got that the right way around. QFE for ground level and QNH for
airfield elevation

sg
"BTIZ" wrote in message
news:nlK2c.16184$id3.9654@fed1read01...
Back to the thread on pilots setting QNH for local acro work.

I was in the trusty Pawnee this weekend and checked the altimeter, I can
only select settings from 28.10 to 31.50, so.. following the others
advice
of setting QNH. I could not.

I attempted to find this information in my personal library but could
not
readily find a source.. so the best source available was to "go to the
instrument".

The lowest I could set at 28.10 still gave me 750ft MSL on the dial, and
obviously 2077 feet below the current terra firma, no way to set ZERO.

So, fly with the correct QFE and do the mental math, precompute your
altitudes required to give the terrain clearance you need.

BT