I suspect I have water in my static system

[201er]

And yet nothing comes out of either... Both my pitot and static had water in them but the drains did nothing. Was having problematic readings till mech disconnected everything and blew the lines out.

 

Bad drains? Or they don't help much unless you're flooded with water?

[Marauder]

And yet nothing comes out of either... Both my pitot and static had water in them but the drains did nothing. Was having problematic readings till mech disconnected everything and blew the lines out.

 

Bad drains? Or they don't help much unless you're flooded with water?

 

 

The drains themselves can be a problem if they don't seal and let water in. I have the O rings replaced annually since I experienced this early in my ownership.

[201er]

The O rings on where?

[M20S Driver]

My airspeed indicator and the pitot system appear to be working fine after I reach 40-45 knots of airspeed but it shows zero before that.  It is very stable and responsive in cruise.

I will have the line purged during annual in December.

[Marauder]

The O rings on where?

The drains themselves have little O rings in them. If you don't change them periodically, they get hard and crusty and break up.

[M20S Driver]

I asked my friend to keep the drain valve open and watch the airspeed indicator as I blew air into the pitot tube. We went up to 180 knots and dropped down. The problem of not indicating speed below 40 knots is gone as it was confirmed by the flight around the pattern

The big question is what was causing it? Nothing noticeable came out of the drain!

[rgpilot]

Try taping over the static ports when you wash the plane.

[M20S Driver]

Good point. I have washed the plane a few times and did not cover the static ports. I did put a cover on pitot tube.

Do you think that the moister in static line could impact the pitot tube reading on take off? I could not come up with a scenario where static line could cancel the pitot tubes stagnation pressure up to 40-50 knots.