Composite-ARF SuperExtra setup

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lockjaw-express · 07-07-2007, 10:58 PM

I need some advise on my Composite-ARF SuperExtra (Carbon Spar) plane as far as mounting the engine:

1) I have 2.5* right thrust, but no up thrust. Should I have 1* of up thrust?

I fly mostly 3D and NO IMAC, so if I have 1* of up Thrust, then when flying inverted, should I move the batts further back, or use the front wing position for balance???

2) In the manual for both my SuperExtra and my 3.3 YAK55SP, should I have 3/4 oz of lead in the leading edge of my elevators for counter-balance?

Thank you for your help!

Best Regards, Mark

lockjaw-express · 07-08-2007, 07:36 PM

Any One?

Darcy Wingo or any other Composite-ARF reps???

BR, Mark

dubd · 07-08-2007, 10:45 PM

I just maidened the same plane (with carbon spar). I am using a SWB 3.5 degree mount for 150cc engines. You can find it at swbmfg.com.

Regarding the counter balance, I do not think you need to do this if you use 2 servos per elevator. I have 4 hitec 5955 servos total on the elevator and I was told by a number of Comp Arf reps and owners that this will be fine. I did have to add 12oz of lead to the nose.

BTW - Use the rear wing position. Jason Shulman told me this is where the tube is located on the wing tube version of our plane. My plane is rock solid for 3D.

lockjaw-express · 07-08-2007, 10:50 PM

Thank you very much for the reply!

Are you running any up-thrust? I was told I needed 1* of up, but I just want to make sure it is needed.

Thanks, Mark

Animal Jesky · 07-08-2007, 11:54 PM

yes, 1 degree of upthrust. Wing in rear position and if you are using 4 elevator servos, no lead is needed. Jason, on Andrews computer

dubd · 07-08-2007, 11:55 PM

Jason, I was using 4 elevator servos and it came out very tail heavy.... do you mean that no lead is needed if your ARE NOT using 4 elevator servos?

Vic3D · 07-09-2007, 12:54 AM

	Quote: Originally Posted by dubd
	Jason, I was using 4 elevator servos and it came out very tail heavy.... do you mean that no lead is needed if your ARE NOT using 4 elevator servos?

They're talking about the counterbalance weight. It is good to have to prevent flutter if you only run one servo per stab. Now, if you run two servos per stab, you have more holding power so you don't need the 3/4 oz on the counterbalance to help with flutter.

Here's a rough drawing explaining what I mean.

dubd · 07-09-2007, 02:42 AM

ah got it. the only lead i have been concerned about is for the nose, so jason's comment went right over my head. hah

07-07-2007, 10:58 PM	#1
lockjaw-express Flyin' Around Join Date: Oct 2006 Location: Cincinnati, Ohio Posts: 28	Composite-ARF SuperExtra setup I need some advise on my Composite-ARF SuperExtra (Carbon Spar) plane as far as mounting the engine: 1) I have 2.5* right thrust, but no up thrust. Should I have 1* of up thrust? I fly mostly 3D and NO IMAC, so if I have 1* of up Thrust, then when flying inverted, should I move the batts further back, or use the front wing position for balance??? 2) In the manual for both my SuperExtra and my 3.3 YAK55SP, should I have 3/4 oz of lead in the leading edge of my elevators for counter-balance? Thank you for your help! Best Regards, Mark

07-08-2007, 07:36 PM	#2
lockjaw-express Flyin' Around Join Date: Oct 2006 Location: Cincinnati, Ohio Posts: 28	Re: Composite-ARF SuperExtra setup Any One? Darcy Wingo or any other Composite-ARF reps??? BR, Mark

07-08-2007, 10:45 PM	#3
dubd Turbine Hucker Join Date: May 2007 Location: Silicon Valley Posts: 1,458	Re: Composite-ARF SuperExtra setup I just maidened the same plane (with carbon spar). I am using a SWB 3.5 degree mount for 150cc engines. You can find it at swbmfg.com. Regarding the counter balance, I do not think you need to do this if you use 2 servos per elevator. I have 4 hitec 5955 servos total on the elevator and I was told by a number of Comp Arf reps and owners that this will be fine. I did have to add 12oz of lead to the nose. BTW - Use the rear wing position. Jason Shulman told me this is where the tube is located on the wing tube version of our plane. My plane is rock solid for 3D. Last edited by dubd; 07-08-2007 at 11:56 PM.

07-08-2007, 10:50 PM	#4
lockjaw-express Flyin' Around Join Date: Oct 2006 Location: Cincinnati, Ohio Posts: 28	Re: Composite-ARF SuperExtra setup Thank you very much for the reply! Are you running any up-thrust? I was told I needed 1* of up, but I just want to make sure it is needed. Thanks, Mark

07-08-2007, 11:54 PM	#5
Animal Jesky Squirrel please... Join Date: Jan 2006 Location: Monroe, Michigan Age: 25 Posts: 625	Re: Composite-ARF SuperExtra setup yes, 1 degree of upthrust. Wing in rear position and if you are using 4 elevator servos, no lead is needed. Jason, on Andrews computer __________________ Thanks Dad, Mom, Joe, and Heather for all your support in everything I do. Bryson Fernandez- Keep a spot up there for me when we meet again, until that day keep flying high in the sky!!!

07-08-2007, 11:55 PM	#6
dubd Turbine Hucker Join Date: May 2007 Location: Silicon Valley Posts: 1,458	Re: Composite-ARF SuperExtra setup Jason, I was using 4 elevator servos and it came out very tail heavy.... do you mean that no lead is needed if your ARE NOT using 4 elevator servos?

07-09-2007, 02:42 AM	#8
dubd Turbine Hucker Join Date: May 2007 Location: Silicon Valley Posts: 1,458	Re: Composite-ARF SuperExtra setup ah got it. the only lead i have been concerned about is for the nose, so jason's comment went right over my head. hah

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