Good work Ken.. Reminds me of the time you worked out that a Ka6 could
not fly above 96,000 feet because the Vne equaled the stalling speed..
good memories from 40 years ago. :)
Ken Caldwell wrote:
On Wed, 2007-01-31 at 12:43 +1030, J Hudson wrote:
I am seeking info on the manometer scale above 160 Kts for ASI Calibration,
up to say 250 Kts.
Basic Sailplane Engineering provides the info up to 160 Kts.
Ive been unable to locate any info - and the scale to 160 Kts does not
appear consistent, let alone to 250 Kts.
If we assume:
1 nm = 1852 m
g = 9.80665 m/s**2
rho (air density) = 1.225 kg/m**3
then the difference in level of the water columns in millimetres is
given by
h = 0.01654 V**2
where V is in knots. (I am using ** to indicate ¨raising to the power¨)
For example at 160 kt we find
0.01654x160x160 = 423 mm
cheers
Ken
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