Shaft for trim tab system needed

[Bruce Caldwell]

I'm looking for parts that drives the trim system which is overhead in the cockpit. It has the crank on the bottom and pulley and tell tale on the top. All I have is the handle and pulley. What I need is the shaft and tell tale parts. Any help out there?

[Robert Lees]

Re: Shaft for trim tab system needed

Hello Bruce:
I have the shaft if that helps (see photo). If you'd like it, it's yours for the shipping cost from the UK, unless you can wait until May when I can ship it from the USA.

You can see the spline where the pulley fits. The crank fits using a cotter pin or scroll pin at the left-hand end.

The rest of the mechanism is a bit of tin and wire, and can reasonably be made by a semi-competent person. Well, I managed it : http://www.taylorcraft.org.uk/trim-system-new.htm



Let me know,
Rob

[Hank Jarrett]

Re: Shaft for trim tab system needed

I have drawings for the "tin bits" if you need them.

Hank

[Bruce Caldwell]

Re: Shaft for trim tab system needed

I'd love to see the drawings. You can post them here of send me an email at [email protected].

Thanks Hank, I have learned so much from your posts.

Bruce
N59893

[Bruce Caldwell]

Re: Shaft for trim tab system needed

Thanks for the reply Rob! I can wait till May. I will let you know next week if that shaft will work with my pulley.

[vetdrem]

Re: Shaft for trim tab system needed

OK, so let me get this straight. There is supposed to be a "trim position indicator" installed??

I had a '41 BC-65 with the flippers and of course no position indicator. Then I bought a '41 BC12-65 DELUXE that has the trim tab on the elevator and a crank in the overhead. It has a wool headliner but no position indicator. I thought that it could use one, but I decided that it didn't really matter, I turned it to relieve yoke pressure for whatever speed I was shooting for, not to make a needle point in a certain direction.

I thought that it was built that way. I guess that I will be doing some investigating when I get back up north in the spring (early May). Leave me some space on the forum so I can ask some probing questions.

Louie

[Hank Jarrett]

Re: Shaft for trim tab system needed

Hope this opens. If not I will try saving it as a jpg instead of a PDF.

Hank

I'd love to see the drawings. You can post them here of send me an email at [email protected].

Thanks Hank, I have learned so much from your posts.

Bruce
N59893

[M Towsley]

Re: Shaft for trim tab system needed

Louis,

The indicator is nice to remind you the next time you take off. If you cranked in a couple of turns, or more, of up elevator trim at landing it will remind you to put it back where you want it for take off the next time you fly if you forgot.

[Guest]

Re: Shaft for trim tab system needed

OK, so let me get this straight. There is supposed to be a "trim position indicator" installed??

I had a '41 BC-65 with the flippers and of course no position indicator. Then I bought a '41 BC12-65 DELUXE that has the trim tab on the elevator and a crank in the overhead. It has a wool headliner but no position indicator. I thought that it could use one, but I decided that it didn't really matter, I turned it to relieve yoke pressure for whatever speed I was shooting for, not to make a needle point in a certain direction.

I thought that it was built that way. I guess that I will be doing some investigating when I get back up north in the spring (early May). Leave me some space on the forum so I can ask some probing questions.

Louie

Yes.

Go to this link and look on page 25 => http://www.taylorcraft.org/docs/Tayl...anual_1985.pdf

[PA1195]

Re: Shaft for trim tab system needed

My trim takes about six turns to go from stop to stop. It's marked nose up/nose down on the pulley with arrows. Midway...three turns from either stop...is neutral trim with the tab in line with the rear of the elevator. Prior to takeoff I set it neutral, or just look back and do the same. Not sure how I'd benefit from an indicator.

Gary

[Robert Lees]

Re: Shaft for trim tab system needed

Well for certain models (my 1946 and 1946 BC12D ones as examples) it was "original equipment".

Legalities aside, can I offer a friendly reminder to owners & pilots to only adjust the overhead trim when the control yoke is in the neutral position, otherwise the cable can slip over the aft pulley .

Rob

[PA1195]

Re: Shaft for trim tab system needed

Mine was born as a BF-65 in June 1941. There's not much mention in this Taylorcraft Instruction Manual on page 4 (https://app.box.com/shared/5koe6ad3br) about an indicator being installed. Maybe there's more available via this Forum regarding it's initial installation?

I had one on my last Taylorcraft (an even earlier 1941 BC12-D N29694) but don't know if it was O/E or added by Jim Blake the fellow that restored the plane prior to my purchase in 1974.

Might be a handy item to refer to if the pulley is covered by a headliner.

Gary

[3Dreaming]

Re: Shaft for trim tab system needed

Mine was born as a BF-65 in June 1941. There's not much mention in this Taylorcraft Instruction Manual on page 4 (https://app.box.com/shared/5koe6ad3br) about an indicator being installed. Maybe there's more available via this Forum regarding it's initial installation?

I had one on my last Taylorcraft (an even earlier 1941 BC12-D N29694) but don't know if it was O/E or added by Jim Blake the fellow that restored the plane prior to my purchase in 1974.

Might be a handy item to refer to if the pulley is covered by a headliner.

Gary

A BF-65 would have had the flipper trim originally. The trim tab in the elevator came along with the B*12-65 series airplanes in 1941. They made both models for a time. The BC12-D didn't come along until November 1945.

[PA1195]

Re: Shaft for trim tab system needed

A BF-65 would have had the flipper trim originally. The trim tab in the elevator came along with the B*12-65 series airplanes in 1941. They made both models for a time. The BC12-D didn't come along until November 1945.

Good information and catch on my mistake...mine was originally a BF-12-65 per Factory paperwork (it varies from a BF-12-65 to BF12-65 in the documents).

Was the trim indictor present at that time or was it a later dated installation?

Gary

[3Dreaming]

Re: Shaft for trim tab system needed

It would have had a trim indicator originally.