Altimeter AND VSI bounce. This has been an ongoing issue in the RV that I owned and was wondering if there is any suggestions on what actually is going on.
Hopefully the video is viewable:
https://photos.app.goo.gl/kwooQNGyfHFFZE838
It has done this for the 4+ years that I have owned it. It has not been washed or been outside in the rain or any significant amount of water. I have occasionally given it a quick wax job using just a detailing spray on wipe off wax.
My assumption in that it affects both ALT and VSI that is must be something in the STATIC system. The STATIC system is stock VANS I believe (I didn't build it). There are the 2 ports halfway back on the fuselage that are then connected together and then run forward to under the panel. the fuselage and they are
Photo of them installed:
https://photos.app.goo.gl/TwhnhZjJ1PvinSX88
I have flown lots of transport category aircraft where weird things have happened and they end up finding water in the TRAPS that are designed to catch that water, but this hasn't been out in the water so even if you think it has water in it that you would think that sitting for a few weeks in the hanger it would evaporate out.
Any suggestions?
How about removing the static line where it first joins behind the panel and blow some low pressure air back towards the static ports?
How about doing a PITOT STATIC test where they block off the ports and run the ALTITUDE up and down?
It does have an ALTERNATE static port, or it where they can hook into the STATIC system under the panel where it gets closer to ENCODER. I have removed the cap nut on that port in flight and it doesn't seem to have any effect, they still both bounce.
Thanks in advance!