Need OD of fuselage tube that goes across top from wing attach fitting to attach fit

[Fred Johnson]

Found an Atlee Dodge clamp for a super cub to attach shoulder harness, if the tube is the correct OD it would allow the use of inertial shoulder harness with no welding. Thanks

[astjp2]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

Just wrap the shoulder harness around the tube, that is what many of us have done. Make sure it mounts higher than your shoulders so it does not compress the spine if there is an accident.

[cvavon]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

I made my clamps out of 1/8 in 4130 sheet cut 1 in wide strip wrapped it around the spar carry threw and bolted the belts to it.My belts had metal ends with 3/8 in holes .

[TimHicks]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

My fuselage is uncovered and in my garage right now. So I can measure the tube for you.
But I won't be back there until this afternoon.
Just to be sure, check the photos below and verify that I'm thinking of the same tube that you're thinking of.

[Fred Johnson]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

Tim,
That is the correct tube. Thanks

[Pearson]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

On my 1946 BC12D that tube measured 0.881". So that would make it 7/8".

[astjp2]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

One thing with Inertia shoulder harnesses, you have to have the mechanism in a specific position for them to work correctly, if your metal strap can rotate, they intertia mechanism may not work correctly if it becomes out of position in a crash. Tim

Found an Atlee Dodge clamp for a super cub to attach shoulder harness, if the tube is the correct OD it would allow the use of inertial shoulder harness with no welding. Thanks

[TimHicks]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

My airplane also is a '46 BC12-D.
So I guess that it's no surprise that I also measured about 0.880" OD on that tube.

[Fred Johnson]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

Richard and Tim, thank you, I'm in Alaska and one of the parts houses has one I can measure. I will try to post a picture and the results later in the week.

[astjp2]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

Reeves or Stoddards? You might check out Chance Aviation and Tamarak if you are in Fairbanks. Tim

[Fred Johnson]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

Bill at Stoddards, he has one in used in the back room, we can measure the tube on the Super cub fuselage, I think it is 3/4 tube it is designed to bolt around. McFarlane has a picture in their catalog, under Atlee stuff. Thanks to the tribe As always for the help.

[cvavon]

Re: Need OD of fuselage tube that goes across top from wing attach fitting to attach

Here are some photos of the one i made as a owner produced part and installed with a log book entry.The FAA's position is any thing that is better then what these old air planes had and is ok with them.