mikegordon10

What % of the total area of Horiz Stab and the Vert Stab on a conventional tail model would you want to make the two surfaces to convert it to a 110 degree V-Tail?

All Day Dan

My Feedback: (5)

Mike, The vertical and horizontal projections of the V tail have to be the same as a conventional empennage. Here's an image of a Bonanza I did many years ago. Dan.

LesUyeda

I'll second what Dan said. I did do that once on something or other.

Les

HighPlains

My Feedback: (1)

Lots of conjecture, very little theory or actual practice when you ask modelers about V-tails.

Here is an old thread on the subject:

http://www.rcuniverse.com/forum/m_14..._1/key_/tm.htm

Forget projected area. 120 degrees works pretty well for most sport designs, but for the record, Beech used 118 degrees.

ARUP

I built a Spirit sailplane and used 110 degrees. I combined the total tail area to make the tailfeathers. Worked like a dream! The aerodynamically ideal situation would be and inverted 'V'. The roll coupling would be to advantage.

BMatthews

Here's a pretty good write up of the topic but has a bit of math with it.

http://www.djaerotech.com/dj_askjd/d...ailvolumn.html

The angle of 110 comes up a lot but the angle is not cast in concrete by any means.  In actuallity you look to get the amount of stabilizer and fin area needed and let the angle float to what it may.  But generally it'll be not far off  from 110.  But let that go and aim for getting the right areas instead of locking yourself down to a given V angle.

LesUyeda

"Forget projected area. "

1 square inch by 1 square inch should work just fine:=((((((((((((((((((((

Les

daven

My Feedback: (1)

15% of the wing area is what I use for my racers.