Very cool! Thanks. I'll give it a try
Kim Blackseth
On May 8, 2008, at 8:25 PM, James Bilello wrote:
I found that 1/2" clear plastic tubing fits over the
end of my pitot static tube just perfect. (I may have
to clamp it with a hose clamp for good measure) If I
take five or six feet of this tubing and slip it over
the pitot tube, I have a great static line and AS
Indicator tester.
Make a deep "J" in the tube and CAREFULLY add water to
the open end. If the water seeks level between both
sides of the "J", the static system is leaking. Test
all connections and fix until THAT problem stops.
Then . . .
When the water starts rising on the open end, you have
a great AS Indicator tester. Measure the difference
in inches between the water level on the pitot side
and on the open side. When the difference is 5", your
airspeed indicator should be reading 100mph.
Here's a pretty good graph I made to check full
ranges:
GRAPH PICKOFF
MPH "H2O
70 2.40
80 3.24
90 4.10
100 5.00 (some say 4.94")
110 5.92
120 7.06
130 8.32
140 9.60
150 11.00
160 12.70
170 14.40
TonyB
3067H
Denver
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