Airspeed indicator

km74 · Post by **km74** » Fri Feb 28, 2003 12:28 am

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

km74 · Post by **km74** » Tue Mar 04, 2003 11:34 pm

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

JDH · Post by **JDH** » Wed Mar 05, 2003 9:21 pm

I would suspect moisture in the system. JD

wa4jr · Post by **wa4jr** » Sat Mar 08, 2003 3:54 pm

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...

Dave Clark · Post by **Dave Clark** » Sun Mar 09, 2003 12:20 pm

Geez guys I've never had that happen here in the desert

Post by **GAHorn** » Sat Mar 15, 2003 6:39 pm

Condensation happens. Cessna later installed a sump in the low point below the static vent. Aircraft Spruce sells them. 877-477-7823