Comp-Arf Extra 300L 2.12M

[TheShirt]

I was told 1 1/4" for Aileron and elevator and 3" for rudder.

[lil-redrex]

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[Onewinglow]

Scotty,

Did you use the phenolic control horns and control linkages, clevises supplied with the kit or go upmarket with this hardware?

Onewing

[Scotty]

Hi OneWing, I didnt use any of the supplied horns or hardware I used some thicker ones from Desert Aircraft, JR 1.5 in Aluminium horns and titanium turnbuckles with ball links either end. The hardware supplied would also be fine though, it was just a quicker option for me - and I am very happy with the setup. I also used JR servo holders in the wings for the Aileron servos for the same reason. I have just measured the supplied rudder horn and it is 2.5 in for those who were asking.

Cheers Scotty

[Howie]

Just to make one thing crystal clear. The control surface horns Scotty used are very stiff. It is 2.5mm thick G11 epoxy board. (PCB type material.) Since it is so stiff you can use a ball link on it without any worry of flexing inducing flutter.

As per the CARF instructions, you cannot use ball links on the horns supplied with the kit.

[linkunyi]

Beautiful

[Scotty]

Thanks Howie, I should have mentioned that again. I believe the supplied hardware would be fine provided it is used the way it is intended - as per the instructions! To use the ball link setup shown on my model you will need to upgrade all of the hardware. I hope I havent confused anyone.

[lil-redrex]

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[DesertHucker]

	Quote: Originally Posted by lil-redrex
	If you used aftermarket metal arms on the servos, and the stock c-arf arms on the surfaces, could you use ball links on the servo arms and then clevis's on the phenolic horns? if you catch my drift? Cheers

Yes and no.
You can use ball links on the servo with metal arms and clevis on the stock control horns. But you may need to align the servo with the surface horn. That's what i had to do with the 2.6m extra

[Onewinglow]

	Quote: Originally Posted by Scotty
	Hi OneWing, I didnt use any of the supplied horns or hardware I used some thicker ones from Desert Aircraft, JR 1.5 in Aluminium horns and titanium turnbuckles with ball links either end. The hardware supplied would also be fine though, it was just a quicker option for me - and I am very happy with the setup. I also used JR servo holders in the wings for the Aileron servos for the same reason. I have just measured the supplied rudder horn and it is 2.5 in for those who were asking. Cheers Scotty

Thanks Scotty for the info and Howie for the clarification. All good stuff and adds to the anticipation. It looks like January before I will get around to putting this aeroplane together, so have plenty of time to learn from the experience of others.

Best regards,

Onewing

[Scotty]

Hi OneWing, Yes Desert Hucker is spot on - it is probably possible to use a combination of metal horns and the CARF control surface horns, although they would not line up without modification as the ball links stand about 5mm off the metal horns. Probably easier to go all standard or all ball links and upgrade the control surface horns. cheers

[lil-redrex]

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[DesertHucker]

	Quote: Originally Posted by lil-redrex
	OK, thanks for the info. Reason Im asking as the manual states not to use the plastic horns to bolt the c-arf arms to, and that you must use metal. Im having trouble sourcing the metal servo discs to suit Hitec, so figured it would be easier to just buy the whole aluminium arm etc. Reckon I might just upgrade both sides to suit the ball links. Cheers Scott www.swarms.org.au

Give Howie a call he will supply a whole upgrade kit with everything in it including titanium links and ball ends.
Spend a couple extra bucks and get the little adjusting tool

[woody7]

hi guys....just gettin ready to put one of these together and was wondering if any of you had put a smoke system in(as the cockpit looks a bit snug)if you have what size tank etc did you use(fuel+smoke),,,,thanks

[3drat]

	Quote: Originally Posted by woody7
	hi guys....just gettin ready to put one of these together and was wondering if any of you had put a smoke system in(as the cockpit looks a bit snug)if you have what size tank etc did you use(fuel+smoke),,,,thanks

you fit a smoke system in a 50 nitro size plane so im sure you will find room lol
cg