Twin boom style and Control Surfaces.

[Callidus]

Hi,

I have built and designed a small twinboom style aircraft.
Being reasonably inexperienced in building I was wondering whether the style of aircraft will fly with elevons.

Basically does the control surface of an elevator need to be at the rear of the aircraft? Or will it work with elevons?

Cheers Guys.

[steve lewin]

If you mean with a tailplane supported by twin booms then I would say the elevators have to be on the tailplane. As you effectively have a conventional layout with a horizontal stabiliser at the back then waggling the ailerons up or down does not give you elevons but flaperons or spoilerons. These are not very effective at forcing pitch changes if they are permanently being fought by a fixed horizontal stab.

But I've never tried it so why not give it a go. You never know it might work.

Steve

[David Hogue]

Callidus,

Check out Dave Lilley's review here of the Paddle:

http://www.ezonemag.com/articles/2001/jan/paddle/paddle.shtml

That might give you some ideas of what will work. I am planning to do a plane that will look something like the Transavia PL-12( the ugly ag plane from the movie Mad Maxx :D) one of these years, and to simplify things was gonna try elevons at the end of the booms...the paddles are angled so that they are functioning more like a v-tail, mine will be flat with a fixed vertical stab.

Good luck,
David

[Callidus]

Well

The reason Im asking is because I did try it. And it did'nt work.

Obviously the the ailerons were responsive but now you mention it it makes sense, when I attempeted to pitch up they acted more like an airbrake - airspeed dropped and so did the plane. Im just gonna have to find room for a 2nd servo...

Cheers Steve ! :D

[Callidus]

wow Gofli That paddle sure does look wierd.

Once ive re-assembled mine Ill post a pic and spec's of the drive.
My covering jobs are dodgy to say the least but it 'did' look cool.

3 foot wingspan
4 1/2 inch Cord
booms 4inch apart 10inch long
2 horizontal stabs with a tailplane that goes accross the top of the stabs.
and the fuse 2inch wide, goes 3 inch forward of the wing and 2 inch rear of the wing.

[David Hogue]

Nah,

Paddle is cute...Now this is wierd:

http://avia.russian.ee/air/australia/transavia_airtruck.html

But it has character:D

Later,
David