Rudder/Elevator tubing junction

[sbmurphey]

Does any one have a photo or an explanation how to join the T4 tube to T14 on the LSA rudder and elevator? (ref. drawings 19 & 20) Is there anything special that needs to be done to insure a smooth transition for the fabric at this location? Maybe it is just the way I am looking at the drawings, but it seems that this junction departs from the standard AC 43.13 examples and is different than any other joint used in the plans. Looking at the building manual, the full size Bearhawk seems to uses a different design here as well.

Thanks,

[dedgemon]

Since the T14 is considerably larger than the T4, you flatten the end of it in a vise. This allows the end of the tube to match the with of the T4. Of course at this point the the outside edge of the tube isn't dead straight anymore, so heat the last few inches of the T14 and tap it aft so that the outboard edge runs straight. Sorry no pictures, its simpler than it sounds.

[sbmurphey]

Ahaha... I see the transition under the covering in the prototype 2 - 3 inches below the junction now. Once t14 is reshaped it can then be fish mouthed. Sounds great....

Thank you dedgemon !!!

[alaskabearhawk]

Like this, same as the horizontal stab. Look at the last picture: http://www.mykitlog.com/users/displa...144682&row=124

[sbmurphey]

Thanks alaskabearhawk for the photos! It looks simple enough.