Bouncing needles

[RAF74_Winger]

I've flown aircraft of similar vintage, but never seen the needles shake around like that, not even during aerobatics or heavy turbulence. There are restrictors in the inlet lines to all of these pressure driven (bourdon tube) gauges for precisely this purpose - besides which the accumulated fatigue damage to the bourdon tube would soon result in a broken instrument if it weren't present.

W.

[Buzpilot]

I would say that engines running at the best in CoD, even then, are somewhat broken.
Mixture don't get sufficient lean ?

[Zoom2136]

Originally Posted by Buzpilot

I would say that engines running at the best in CoD, even then, are somewhat broken.
Mixture don't get sufficient lean ?

What we can't lean past peek EGT

[Space Communist]

Originally Posted by RAF74_Winger

I've flown aircraft of similar vintage, but never seen the needles shake around like that, not even during aerobatics or heavy turbulence. There are restrictors in the inlet lines to all of these pressure driven (bourdon tube) gauges for precisely this purpose - besides which the accumulated fatigue damage to the bourdon tube would soon result in a broken instrument if it weren't present.

W.

Interesting. Well I dunno what was up with this plane I was in then. Doing a brief internet search and finding some images I am confident the plane I went up in (which had very bouncy instruments indeed) was a Piper PA-17, if that helps.

Edit: I initially thought it was a J-3 but i was mistaken