Gauges related to Pilot tube freeze at high altitude now.

[Rainbowgirl]

Vertical Speed Indicator, Airspeed Indicator and Altimeter continue to freeze at high altitudes during long flights even when Pilot Tube heater and onboard generator are turned ON. Without these vital gauges P-51 can`t be flown in its intended role, which is long distance high altitude escort or just high altitude cruising. Once gauges start to freeze, a pilot is unable to keep the plane is stable level flight. Horizont and clouds [ if there are any ] don`t serve as precise visual point of reference. The plane is then flown on vertical  oscillating trajectory wasting  kinetic energy which should be invested purely on sustaining achieved speed. Only remedy to frozen gauges is to descent below 2 km altitude...remaining there for 3-5 minutes and then climb back to 6-8 km altitude until gauges start to freeze after 30-60 minutes again. This did not use to be the case in past, thereafter reporting the issue. Thanks.

 

Edited December 4, 2023 by Rainbowgirl

[grafspee]

Issue reported many many times over. I don't know what status this issue has but my bet is on "can not reproduce" state.

[Rainbowgirl]

1 hour ago, grafspee said:

Issue reported many many times over. I don't know what status this issue has but my bet is on "can not reproduce" state.

Hmmmm, that`s unfortunate. Maybe one day. Still hoping, haha.

Edited December 4, 2023 by Rainbowgirl

[Hiob]

*Pitot (Named after Henry de Pitot)

and btw. Altimeter and VSI don’t need Pitot tubes afaik. I don’t know if they are affected by a pitot tube heating element. (Maybe they are heated by the same circuit nevertheless?)

Edited December 4, 2023 by Hiob