t-tail constuction

[amike_321]

ive got a few questions on constructing a t-tail for my hobby lobby skimmer.

1. can i use the same dimensions as the conventional setup? like how big the fin and the stab are.

2. how to connect the stab on top of the fin. i would think screws would be the best way but the grain traveling parallel with the screw would have any grip.

3. how to run the pushrods, or push-wire to the elev.

thanks for the help, in advance....

[Dsegal]

> 3. how to run the pushrods, or push-wire to the elev <

The worst thing about T-tails is that the geometry is all wrong for the pushrods. A real pain to get right.

Dave Segal

[NightSwan]

My solution to >3 would be :

Create a lever where your stab in normal position would be, and connect a pushrod to the servo there.

I'll try to explain in a pic :

Hope this helps... )sorry for the crappy drawing, coreldraw crashed on me....)

[NightSwan]

Hrm, that should have come out a little bigger.... I hope this makes sense...

[Larry Dudeck]

I used a 'Sullivan' golden rod, a flexible cable. Works fine.

[t-turley]

Wow, nice airplane, Larry. :cool:

[amike_321]

getting clearer, thanks.

[Gonflyin01]

Take a Look at the Ace Sea Master! It has an Excelent set up!

[DaveSawers]

1. Yes. The same dimensions are fine.

2. Bolting the tailplane on is fine, but you will need to install captive nuts in the fin. Wood screws aren't going to work. Structurally, you must ensure the fin is much stiffer than a normal tail construction. You may want to consider using two very thin sheets of ply either side of a central spar and with a leading edge glued on.

3. NightSwan's bellcrank idea works fine. With a hollow fin, you can install all the bits inside which is much neater. Most people just use a flexible snake which is simpler and as long as it is fixed securely to the fuselage sides for as much of its length as possible does not slop. Again, fit it inside the fin.