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jbhart(at)onlyinternet.ne
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 Posted: Fri Aug 22, 2008 2:18 pm Post subject: Checking Your ASI |
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Bill,
It took me more than a few days. One way it can be done may be seen
at:
http://www.thirdshift.com/jack/firefly/firefly144.html
Fly Safe!
Jack B. Hart FF004
Winchester, IN
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herbgh(at)nctc.com
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Fri Aug 22, 2008 4:03 pm Post subject: Checking Your ASI |
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> The way I did it also...just pump a differential into the manometer
| Quote: | and read the airspeed...The adjusting of the airspeed indicator gets a
bit complicated...  Herb
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Gang:
More times than not the problem is with accurate static pressure and not the
ASI, if you bought or obtained an ASI that was certified, of good quality,
and not damaged.
Are you all correcting static pressure, or checking accuracy of your
instrument only?
TAS is not important flying our type aircraft, however an ASI that is
consistent gets the job done to let you know when the aircraft will stall,
normally.
john h
mkIII
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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slyck(at)frontiernet.net
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| Posted: Fri Aug 22, 2008 4:16 pm Post subject: Checking Your ASI |
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Last saturday Bob Erb and I were flying together. His FSII was going
70 and,
right alongside, my MkIII was going 60
BB
On 22, Aug 2008, at 8:03 PM, John Hauck wrote:
| Quote: |
> The way I did it also...just pump a differential into the manometer
> and read the airspeed...The adjusting of the airspeed indicator
> gets a bit complicated... Herb
Gang:
More times than not the problem is with accurate static pressure
and not the ASI, if you bought or obtained an ASI that was
certified, of good quality, and not damaged.
Are you all correcting static pressure, or checking accuracy of
your instrument only?
TAS is not important flying our type aircraft, however an ASI that
is consistent gets the job done to let you know when the aircraft
will stall, normally.
john h
mkIII
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JetPilot
Joined: 10 Jan 2006
Posts: 1246
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| Posted: Sat Aug 23, 2008 3:41 pm Post subject: Re: Checking Your ASI |
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A very easy to check your ASI is to just fly and check it against your GPS speed in calm winds. A quick run in one direction, and then on the opposite direction at the same indicated airspeed will tell you if there is any wind. If there is wind, your GPS reading will not be the same on both runs...
If there is some wind, you can still find your exact speed by flying exactly into the wind, then exactly downwind. Half the difference in the GPS speed readings will be your windspeed. Then you simply compare GPS speed to your airspeed to see how far off it is.
Mike
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_________________
"NO FEAR" - If you have no fear you did not go as fast as you could have !!!
Kolb MK-III Xtra, 912-S |
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