Thingy on top of Turn and Bank

sbmackie · Post by **sbmackie** » Mon Jan 11, 2021 4:03 pm

In the pic below, there is a disc screwed into the rear of the T and B (Vacuum) What is the disc for?

Thanks

: T and B.jpg (47.02 KiB) Viewed 2088 times

a64pilot · Post by **a64pilot** » Mon Jan 11, 2021 4:54 pm

God that thing looks as old as the WWII instruments that were in mine.

My guess is that it’s a valve so that you can change the amount of airflow through the instrument. But that’s a guess.

I’ve never worked in a Vacuum T&B, does it only have one hose that goes to it? If so then could the disk hold an air filter?

8102 · Post by **8102** » Mon Jan 11, 2021 6:00 pm

I found this image online from a 1940's manual. Looks like the "thingy" could be a filter.

Gregg

2066 · Post by **2066** » Mon Jan 11, 2021 6:44 pm

: AN TURN AND BANK AIR FILTER.jpg (265.54 KiB) Viewed 2066 times

Post by **6643** » Mon Jan 11, 2021 7:23 pm

Yup!

Take the staples out and change the paper with bits cut from a coffee filter.

The Cessna 120-140 Association Forum

Thingy on top of Turn and Bank

Thingy on top of Turn and Bank

Re: Thingy on top of Turn and Bank

Re: Thingy on top of Turn and Bank

Re: Thingy on top of Turn and Bank

Re: Thingy on top of Turn and Bank