noveldoc

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Am converting, bashing, a Venture 60 kit to make a kinda scale like Beech Bonanza V tail. Question is how to do the tail.

As near as I can tell from photos looks like I want to go about 50% more than current horizontal stab area for total control surface area and about 40% of that total for ruddervator area. Full size plane has about a 120 degree angle between the surfaces.

Thoughts?

Tom

All Day Dan

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Tom,
I designed a Bonanza about 25 years ago. It was powered by a K&B.60. I made sure that the horizontal projection of the V-tail was the same area of an equivalent horizontal stabilizer required for this size model, about 25% of the wing area. The same applied to the vertical stab. The model flew great with no noticeable difference than a regular empennage. Dan.

limeybob

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That's the way to do it.
The same horizontal and vertical projections from the original dimensions.
Bob

noveldoc

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Thanks guys.

That plane looks great.

Did you do about a 90 degree angle between tail feathers?

Tom

All Day Dan

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Tom, I can't find the plans. All I have is the reduced version that appeared in Flying Models. The seperation is 120 degrees. Keep us posted on your progress. I would love to see another one fly. Dan.

limeybob

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the angle will be decided by the original dimensions of the stabs.
Bob

noveldoc

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Thanks for all guys.

Those plans especially will be a big help.

Tom

CoosBayLumber

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The bend to the Vee tail is quite critical. It was discussed in the Aero-forum a good year ago or more, but think the proper interior angle lies between 110 and 120 degrees. No where near to 90 degrees.

I have a couple of A/C with Vee tails and all seem to be at about 114 degrees.

Wm.

mikeamx

The original Bonanzas were set at 30 degrees per side. The tails were enlarged and reset to 33 degrees starting with C35 Bonanzas. Mike

ARUP

Fullscale sailplanes seem to have the angle between the 2 surfaces ~110 degrees. I built a Spirit sailplane with a V- tail. I added the areas of the stab and rudder to arrive at the dimensions used. The surfaces were, you guessed it, 110 apart! But as stated previously- you will be able to arrive at these dimensions since you are building a scale design. Good luck

noveldoc

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Interesting discussion on the angles. Thanks guys.

The scale Bonanza plans posted show an angle to the fuse of 30 degrees.

Tom