Tee tail

[Wake Turbulence]

I want to make a full flying tee tail on top of a fiberglass fuse.
How do I set it up? Do I do it like a regular flying stab but higher? :confused:

[schrederman]

I use a belcrank (1:1) and a second pushrod up the fin to the actuator rod.

Jack

[BMatthews]

First you need to know that the fin can take the loads that a T tail will induce during hard landings. The fin needs to be as strong as your wing and even more torsionally stiff to withstand the shock and torsional loads that the stabilizer can induce. Even the tail boom of the fuselage needs to be built more strongly. I learned the hard way with a couple way back.

But if the fuselage is made for it then fine. The trick then is to get a nice clean saddle and joint. setup.

I'm not sure how much you'll get out of it but here's a couple of pictures I took for someone else that wanted T tail info. The pushrod runs down to a giant scale sized 90 degree nylon bellcrank that is built into the fin permanently. Extra care was taken to ensure I don't ever need to see it again... :D

The reason for the little wider platform is to provide a longer pivot tube than you get with the usual bearing holes in the side of the fin skin. This longer tube greatly reduces the need for a very tight tolerance fit on the main pivot and reduces the effect of wear. I'm using just a regular length of 3/32 music wire for the joiner and a 1 inch length of 3/32 ID standard brass tubing as the pivot bearing. Despite the "sloppy" fit there's only around a 1/16 inch of wobble from this play at the tip of the stabilizer.

Hope this helps out a little.

[Wake Turbulence]

Thanks, the pictures do help a lot. This glider is made for a tee tail that is bolted down and I want to make full flying. ;)