Peter,

This comes from the Cessna 172SP Manual from 1998.
VNO (Max Structural Cruise Speed) 129 KIAS (knots indicated airspeed)
VNE (Never Exceed Speed) 163 KIAS

I don't know your experience so I'll explain briefly.
KIAS comes from the speed of the air going into the pitot tube and shows on
your air speed indicator. Most show KIAS and not KTAS (knots true airspeed)
but have a calibration knob to make corrections. KIAS is the speed the
airplane "thinks" it is moving through the air. Hence, flying into a head
wind, KIAS will be higher than actual speed and a flying with a tailwind
would show lower than actual speed. KTAS is obtained by math. Remember,
they told us "some day you'll need this". It's obtained with altitude and
temperature.

The highest KTAS that the Cessna performance charts show for standard
temperature is 124 KTAS. That's at 8,000 ft, 77% BHP, 2700 RPM and using
10.4 GPH.

And now in the for what's it's worth department. In FS2004 I can't get the
performance from the C172SP that I can get in real life with a 1978 C172N
model!
--
Chris Ehlbeck, PP-ASEL
"It's a license to learn, have fun and buy really expensive hamburgers."

"Peter Greenstein" wrote in message
...
I don't seem to be able to get the default Fs2004 Cessna 172 up to normal
cruise speeds. I max out at about 105-111 TAS at various altitudes. But
from
various Internet sources, it seems that the real 172 should be able to
cruise at 125-140 kts.

Anybody else bothered by this?





--
peter greenstein
http://wakefieldjazz.com/