Composite Arf and Recommended Linkages?

[eagle1]

on the 2.6 it is not bad using plastic anything bigger go with aluminum servo arms

[rcheliman]

	Quote: Originally Posted by Tex
	The 2.6 extra 300 that I'm building says to use metal out put disc, and your right.......NO PLASTIC. Or you can use SWB arms.......how ever, you cant use ball links with phenolic arms unless you double them on the controll surfaces.

They should double up the phenolic arms from the factory, I lost one on this very account, was my first Comp-arf and I bought it second hand and put ball links on the phenolic flying surface, 1st snap roll and in she went. 5th flight total.

[pepatrick]

I took a piece of painters tape and marked 4mm from trailing edge of the wing (before the ailerone) and used a cut off wheel. Then I took a sanding block to get it looking nice...It is a perfect edge across the trailing edge. I have seen some trim this off..it looks like they used plyers and and chipped it off.

The 2.6 Yak is a 3D monster. Much more so than the 3.0 Yak. Use SWB or JR 1.5" arms. If you are using 8711s you can get away with one servo per aileron.

[eagle1]

	Quote: Originally Posted by rcheliman
	They should double up the phenolic arms from the factory, I lost one on this very account, was my first Comp-arf and I bought it second hand and put ball links on the phenolic flying surface, 1st snap roll and in she went. 5th flight total.

do not put ball links on a single phenolic arm could cause twist and damage the arm or the plane

[jmoesdad]

im getting a used 2.6 yak and would like to use a single 8711 on each aileron. is there an easy way to remove the outer phenolic horn and remount it next to the inner one to sandwich a ball link?

[wmat7039]

	Quote: Originally Posted by jmoesdad
	im getting a used 2.6 yak and would like to use a single 8711 on each aileron. is there an easy way to remove the outer phenolic horn and remount it next to the inner one to sandwich a ball link?

I have a few horns that I got in kits of both the Super Extra & 260 from Comp Arf. These are actually the 3.0m & not the 2.6, but I think they should work. If you cut off one from your existing wing, it is going to be short when inserted into a slot. I can send some to you for free if you pay the shipping...

Can you send me a photo of the horn as it is on the plane so that I can send you the right one?

Wayne
Sew Busy 770-424-2102
http://www.sewbusy.com

email: wmat7039@bellsouth.net

[jmoesdad]

thank you wayne...ill pm you my address, i guess removing a horn would take some butchering. the plane is actually prides old yak, im hoping it has some mojo in it for my first basic season.

[~SnApRoLl]

I am building my first Compy. And I decided to use the stock phenolic control horns on the surfaces and went with 1.5" aluminum servo arms with Nelson 4-40 ball links on the servo arm and clevises on the phenolic horns. I am how ever NOT going to use the included 3mm threaded rod because its threads into the clevises loosely and sloppy! So I am going to use the Dubro H/D clevises and H9 Titanium links. Here is a picture of my linkages mocked up. Also I still need to widen the aileron slot a bit for clearance and throw as pepatrick mentioned.

Shawn

[jmoesdad]

yea i dont think im going to use the phenolic servo arms either. probably 1.5 swb arms with titanium rods to balljoints sandwiched between 2 horns. i havent decided wether or not il double up the elevator horns or just set it up lilke yours.