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Airspeed indicator
Posted: Fri Feb 28, 2003 12:28 am
by km74
With the recent cold weather I have noticed that everytime I go out to fly my plane, the airspeed inicator needle is up around the 40 knot mark. Also, after my last flight the needle was stuck at 60 after I landed and I had to tap it to get it to drop. Is my indicator hooped or do you think it could be a static port plug? Also, is it hard to install a new one? this one looks like the original.
Thanks
Ken
51 170A
Posted: Tue Mar 04, 2003 11:34 pm
by km74
It was warmer today and it didn't do it. Maybe it was a peice of ice in the pitot or static system? Hopefully it doesn't do it anymore.
Ken
Posted: Wed Mar 05, 2003 9:21 pm
by JDH
I would suspect moisture in the system. JD
Posted: Sat Mar 08, 2003 3:54 pm
by wa4jr
Hi Ken...I have the same problem all the time. When the airplane was tied outside it was really bad. I had the pitot system blown out and plenty of water came out. Airspeed once again indicated zero on the ground. Functioned well for a few more weeks and the problem came back to a lesser extent...even with a positive seal on the pitot tube. Now with the airplane in a hangar, I still have the airspeed indicator once again reading 10 or 20 mph on the ground. Perhaps moisture condensing inside the pitot line or airspeed indicator itself? AI has noticed it on my annual, so it's coming out for investigation. Perhaps the installation of one of those clear plastic sump bottles will help...
Posted: Sun Mar 09, 2003 12:20 pm
by Dave Clark
Geez guys I've never had that happen here in the desert
Posted: Sat Mar 15, 2003 6:39 pm
by GAHorn
Condensation happens. Cessna later installed a sump in the low point below the static vent. Aircraft Spruce sells them. 877-477-7823