Airpeed appears to be way off

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8466
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Re: Airpeed appears to be way off

Post by 8466 »

6643 wrote: Fri May 29, 2020 2:53 pm If it's easier, just disconnect all of them. It's not like you're going to be shooting an approach to minimums anytime soon! ;)
How much will that affect the altimeter?
Happy flying. :D
8474
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Re: Airpeed appears to be way off

Post by 8474 »

not enough to worry about unless you are doing an ILS to mins :lol:

Seriously, I disconnected all instruments from the static port, removed all the static lines and fittings and there is no issue. I my opinion in these small VFR only airplanes it probably safer that way. If the static port gets blocked for some reason and you take off you will have none of your instruments reading correctly.
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6643
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Re: Airpeed appears to be way off

Post by 6643 »

Yeah, I got ice in the static port once. It was very confusing...
8466
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Re: Airpeed appears to be way off

Post by 8466 »

8474 wrote: Fri May 29, 2020 5:14 pm not enough to worry about unless you are doing an ILS to mins :lol:

Seriously, I disconnected all instruments from the static port, removed all the static lines and fittings and there is no issue. I my opinion in these small VFR only airplanes it probably safer that way. If the static port gets blocked for some reason and you take off you will have none of your instruments reading correctly.
I agree with you. The altimeter will be slightly higher, increase the airspeed and doesn't affect the VSI at all. As for the static port being plugged, the instruments will be screwed up. Thank you for your help.

Thayne
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6643
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Re: Airpeed appears to be way off

Post by 6643 »

If the static is making the airspeed be off, don't you think it's doing the same for the altimeter?
8466
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Re: Airpeed appears to be way off

Post by 8466 »

8474 wrote: Fri May 29, 2020 5:14 pm not enough to worry about unless you are doing an ILS to mins :lol:

Seriously, I disconnected all instruments from the static port, removed all the static lines and fittings and there is no issue. I my opinion in these small VFR only airplanes it probably safer that way. If the static port gets blocked for some reason and you take off you will have none of your instruments reading correctly.
I disconnected the line just inside from the static port. I flew today and it works..The airspeed is about 12 MPH faster and the stalling the plane coincides with the published speeds. The altimeter works better too..it was bouncy but now it's not and the VSI is slow in responding but not bouncy either as it was before. Thanks everyone for your help.

Thayne
Happy flying. :D
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Re: Airpeed appears to be way off

Post by bffpropilot »

8466-
Did you go through with the static line procedure? I just picked up a 46 140 and it exhibits the same anomalies. Airspeed 90mph (even with 0235) VSI 500 descent. - I agree that 65-70 ‘feels’ crazy fast
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