elevator stop?

[lawheelock]

Re: elevator stop?

Hank, the diameter of the head is 1.0 inches. It is a mushroom head much like an engine valve. The threads are 5/16 fine threads. I have taken several pictures and will post later.
Larry Wheelock, BC12D under long term repair and wrecked F-19 parts plane

[lawheelock]

Re: elevator stop?

Here are photos I took today of the stops installed in the tail section of the wrecked F-19 I have, in the tail of my covered BC12D and of the stops after removal and cleaning from the F19 fuse tail section.
The mushroom heads appear to have been welded to cut off bolts and then machined on a lathe. You can see the end of the bolt in the center of the head. The head is 1.0 in in diameter and is welded to a 5/16 fine thread bolt I found the P/N on drawing 0495 of the ESSO 6048 drawing file I downloaded. The P/N is 1095.
Larry Wheelock, BC12D and Wrecked parts plane F19.

[Hank Jarrett]

Re: elevator stop?

I was talking to Chuck tonight and he made an interesting observation. Could Taylor have just gone out and gotten washing machine leveler bolts and use them? They sure look just like what are sticking out of the bottom of an old washer to keep it level!

Hank

[Pearson]

Re: elevator stop?

Those are plow bolts! I am sure if you do a Google search you will find a farm supply store with them in stock.

[M Towsley]

Re: elevator stop?

There are a bunch of pictures of these. Here are a few:

[Hal]

Re: elevator stop?

The thread size on mine are standard AN 5. 5/16 x 24
I needed a front one (down stop) and made one from AN525-4 bolt (rounded head) with two AN fender washers under the head. Added a couple regular washers behind the fender washers for spacing and slid this through the welded-on nut. Then i just added a washer and nut behind the welded nut to hold it in position.
Hal

[lawheelock]

Re: elevator stop?

I was talking to Chuck tonight and he made an interesting observation. Could Taylor have just gone out and gotten washing machine leveler bolts and use them? They sure look just like what are sticking out of the bottom of an old washer to keep it level!

Hank

Hank and others,
I thought I had done a good job of taking pictures of the elevator stop bolts from the F-19 which are identical to the un-removed ones on my BC12D, but I guess I did not.

They are NOT plow bolts! I was raised on a Farm (still own it) and have used lots of plow bolts. These are not plow bolts.

They are not washing machine or other appliance leveling bolts.

The face is convex, meaning not flat. If you look carefully, the "mushroom head" looks more like an engine intake or exhaust valve without the ground seat area.

Both the face and the conical shape of the bolt side show that they have been turned like on a lathe. Probably some specialized screw machine.

The head appears to have been welded to the threaded shank.

I am not saying some of these other ideas won't work OK, but to me it is obvious that Taylor (and Dorthy Farris) either had these specially made or found a vendor that had these bolts.

On the '46 they used castled AN 320-5 shear nuts as jam nuts and on the 1978 F-19 they used AN 316-5 check nuts.

And again, the Taylorcraft Part Number is 1095.

Larry Wheelock, A&P/IA, BC12D and wrecked parts plane, '78 F-19

[Hank Jarrett]

Re: elevator stop?

DRAT! Dorthy was better about getting "real" airplane parts than Taylor was. The older planes had lots of parts that were from automobiles and farm equipment and I was hoping these were left from that era. Still, it should NOT be that hard to make them with a small lathe. I like the idea of using threaded stock for the shank and drilling and tapping the "head". You could then thread the "head" stock in the lathe on a threaded pin in the chuck and turn the shape. Remove the head and thread it down flush on the end of the thread stock and touch it with the welding torch. Grind the convex end smooth and you are done. Nice and simple to make in a production run.
I will take a look at the parts pile and my planes today and see if I have them. If so, I may have an extra or two, but I don't remember ever seeing them.

Hank

[Marv]

Re: elevator stop?

If i were trying to find a replacement for these bolts i would check a Fastenal store.

[3Dreaming]

Re: elevator stop?

Hank. I don't think the pre war airplanes had this style stop.

[adrozell]

Re: elevator stop?

If the thread size is 5/16 24 fine. The bolts that are similar are 5/16 18 cores, at least the ones that I found. So looks like something that will have to be made. Need to double check the size of the hole in the plane. Thanks for all the pics guys. Lots of help.

[lawheelock]

Re: elevator stop?

Andrew,
The threads in the plane should be 5/16-24 unless someone before you bastardized it by tapping to 5/16-18. That area of my '46 BC12D is identical to the tail parts from the '78 F-19. Originally the forward stop screwed into a nut that had been tack welded to a little cross piece. The aft elevator stop screwed into a short piece of tubing which was welded in a cluster on the tail post. That short piece of tubing was tapped to 5/16-24

You can use an AN 5/16 - ? bolt and cut it off and weld a new head to it.

Larry Wheelock, '46 BC 12D 65 Cont, '78 F-19 purchased wrecked parts plane, '46 Stinson 108 flying with 180 Lyc , 41 Aeronca 65CA basket case (that I should sell) and '65 Mooney M20C flying

[Hank Jarrett]

Re: elevator stop?

Looked at three different pre-war tails and there not only isn't a stop on any of them, there isn't even a place to put one! I can't imagine three different planes having the mounts cut off. Maybe they started putting them on after the war.

Hank

Maybe I am just looking in the wrong place?

[otrcman]

Re: elevator stop?

How about this for a ready made part ? Curiously, they are called Elevator Bolts. But I don't think the maker had Taylorcraft elevators in mind when he named them. Seem to come in various shank diameters & lengths, but I only saw coarse threads. If you real insist on fine threads, you could order long ones, then shorten and rethread.

You would have to check out the head diameter. Dimensions are given on the web site, but I don't know the size of the Taylorcraft parts.

Dick

https://www.boltdepot.com/Product-Details.aspx?product=14855

[3Dreaming]

Re: elevator stop?

Looked at three different pre-war tails and there not only isn't a stop on any of them, there isn't even a place to put one! I can't imagine three different planes having the mounts cut off. Maybe they started putting them on after the war.

Hank

Maybe I am just looking in the wrong place?

Hank, if I remember right there is a piece of wire welded across that serves as one stop, and the other is up front by the "H" column in the form of a rubber bumper.