Re: Calibration check of pitot static systems

[Fred Fillinger <fillinger@ameritech.net>]

> I have had many requests for the ASI calibrating water manometer
> details.  The interest is such that it would be helpful if you could
> fill in the blanks on the NACA "adiabatic standard" column.
> 
> Again, thanks for bringing the figures up to date,
> John.

Easy enough, below; at sea level, std temp, and 29.92.  Consider
checking any new ASI before the warranty is out, if not right out of
the box; my 2-1/4" UMA way off at critical low airspeeds (4 knots
high).  They promptly replaced it.

Fred F.

SPEED     WATER
KNOTS     HEIGHT  
          in mm
30          14.9
40          26.5
50          41.5
60          59.8
70          81.4
80         106.5
90         134.9
100        166.7
110        202
120        241
130        283
140        329
150        378
160        431
170        487
180        547