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Electric T&B off?
Posted: Tue Jul 04, 2023 1:43 pm
by 6597
So I have this ancient T&B in my panel. When I spool it up on the ground the needle is centered, with plane leveled with a bubble level across the lower door frames, ball is centered.
When I fly and my Artificial Horizon confirms level flight I most often get a slight needle to the left, bubble still centered.
Is there some trim detail I am missing or does the needle just like messing with me to give me another little futzy thing to fix?
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Re: Electric T&B off?
Posted: Tue Jul 04, 2023 3:15 pm
by 6643
6597 wrote: ↑Tue Jul 04, 2023 1:43 pmmy Artificial Horizon confirms level flight
What does the compass or DG say?
Re: Electric T&B off?
Posted: Tue Jul 04, 2023 3:26 pm
by 6597
Will check on next flight. What should I look for? I am blessed with a very good vacuum DG, spot on the runway heading after an hour of flight, who'd a thunk....
Wet compass on the other hand...
I've confirmed this needle thing in calm no-wind conditions.
Re: Electric T&B off?
Posted: Tue Jul 04, 2023 7:22 pm
by 6643
The TC is saying you are in a (roughly) 8 minute coordinated turn, so, 45 degrees in one minute. It might go unnoticed.
If you have an artificial horizon that says wings level, and you are turning, the turn is not coordinated (and the ball wouldn't be centered). If you're not turning, the needle is out.
First thing I'd check is the instruments are level with (parallel with) the front spar. The spar and gear box should both be level.
Re: Electric T&B off?
Posted: Fri Mar 22, 2024 8:11 pm
by 6597
To revive an old thread, found the problem.....now have the proper T&B in and all is well. Just when I thought there weren't any other things 'off' in my bird. Weather is lousy here so am playing behind the panel. Hats off to Century Instrument Corp. in Wichita.
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Re: Electric T&B off?
Posted: Sat Mar 23, 2024 6:49 am
by 8362
Nice, surprised it worked at all.
Re: Electric T&B off?
Posted: Sat Mar 23, 2024 8:36 am
by 6898
That's a good one,thinking the person who installed that would have put a 28 volt battery on the pass seat to run it? LOL
Re: Electric T&B off?
Posted: Sat Mar 23, 2024 11:14 am
by 6643
A 12 volt battery wired in series with the system battery. And a switch to charge it when you don't need the T&B.
Re: Electric T&B off?
Posted: Sat Mar 23, 2024 1:01 pm
by 6597
Truth of the matter is now that engine overhaul is done I'm starting to look for the little nit-picky things on the bird. I've flown this thing for ages and just never got around to dealing with the T&B. I stuck my cellphone camera up in back of the panel to see what was going on and lo and behold....