Mike Rapoport wrote:
: A little better actually. On Saturday I measured 140kts at 5000' and 50F at
: the recommended cruise setting.

Excellent! I guess 0.35 MU-2 is around 110kts?

: The airspeed indicator seems to read correctly at cruise but it reads at
: least 8kts high around 55kts.

I can't speak for the Helio, but many Cessna airplanes have a conversion
table in the POH that describes the CAS - IAS differentials. It's quite
large at lower airspeeds, as I recall. I presume that its due to pitot/static
errors that are not cancelled out (as they could be with an air data
computer). Do you suppose this may be the reason for the discrepancy?
The Cessna tables also noted that despite the error between CAS and IAS,
the range markings on the airspeed indicator were accurate. In other words,
Vs0 was at, say, 44kts IAS and that was marked on the airspeed indicator,
while the calibrated Vs0 was a different number. I can't remember the exact
wording, and I gave away my Cessna stuff years ago.

Anyway, have fun with the new toy.
--
Aaron Coolidge