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Control Surface Deflection - 1/5/2008 1:55:41 AM   
layback2


 

Posts: 495
Joined: 2/27/2005
From: burneyville, OK, USA
Status: offline
I could use some help on the Recommended Control Surface Deflection

Control Direction for a J3 cub 25 that had a not so good manual can someone fill this in in inches or close as it can be please thank you
mm in.
Elevator Up 30
Elevator Down 30
Rudder Both 35
Aileron Up 1.1
Aileron Down 1
CG 56-66



< Message edited by layback2 -- 1/5/2008 1:56:38 AM >
       Post #: 1

RE: Control Surface Deflection - 1/5/2008 3:32:22 AM   
layback2


 

Posts: 495
Joined: 2/27/2005
From: burneyville, OK, USA
Status: offline 		never mind i got the answer

30mm = 1.18"
35mm = 1.37"
1.1mm = .043"
1.0mm = .039"
56mm = 2.20"
66mm = 2.59"

(in reply to layback2)
       Post #: 2

RE: Control Surface Deflection - 1/5/2008 7:49:33 AM   
combatpigg



Posts: 9784
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		The elevator and aileron throws look wacko.

_____________________________

Led Zeppelin is NOT "old fogie" music.

(in reply to layback2)
       Post #: 3

RE: Control Surface Deflection - 1/5/2008 1:31:08 PM   
rainedave



Posts: 5171
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online 		Yep, those don't look right at all!

Start with this:

Ailerons - 8° down; 10° up
Elevator - 12° each way
Rudder - about 20° or more

Be certain that you hook the push rods up to the innermost holes on the servo arms and the outermost holes on the control horns. Otherwise, your Cub will be twitchy in the air.

David

(in reply to combatpigg)
       Post #: 4

RE: Control Surface Deflection - 1/5/2008 4:09:18 PM   
combatpigg



Posts: 9784
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		I've always wondered why a set of plans that took 8 hours to draw doesn't contain 15 minutes worth of detailed notes about how to set up the controls?

_____________________________

Led Zeppelin is NOT "old fogie" music.

(in reply to rainedave)
       Post #: 5

RE: Control Surface Deflection - 1/5/2008 9:12:44 PM   
layback2


 

Posts: 495
Joined: 2/27/2005
From: burneyville, OK, USA
Status: offline 		Thanks for the help yes i wonder why any arf plane made has such a crummie Manual i have found other items on the plane that didnt make sence to me either.for one the engine crowl does not have any room to mount to the front of the fuse it slides over the engine mount and thats as far as it will go.the control rods set in a plactic tube then go in the tube even the worst arfs i have seen used a wooden rod and small short control rods with heat screnk over it.not this one i will replace the control rods to 56s anyway thanks

(in reply to combatpigg)
       Post #: 6

RE: Control Surface Deflection - 1/6/2008 12:44:18 AM   
BMatthews



Posts: 8943
Joined: 10/4/2002
From: Burnaby, BC, CANADA
Status: offline 		Those specs are more for 3D flying regarless of if they are degrees or mm's. Definetly wacko.


_____________________________

Bruce-
Proudly wasting balsa since 1965.

Free Flighters go that extra mile........

(in reply to layback2)
       Post #: 7

RE: Control Surface Deflection - 1/6/2008 3:25:44 AM   
layback2


 

Posts: 495
Joined: 2/27/2005
From: burneyville, OK, USA
Status: offline 		Well makes no sence to me why the same plane same size different maker will have a good manual and the setup for the controls be so different

This plane here is the eflight J3 cub 25 comes with a very good manual

Control Throws
The amount of control throw should be adjusted as closely
as possible using mechanical means, rather than making
large changes electronically at the radio. By moving the
position of the clevis at the control horn toward the outermost
hole, you will decrease the amount of control throw of the
control surface. Moving it toward the control surface will
increase the amount of throw. Moving the pushrod wire
at the servo arm will have the opposite effect: Moving it
closer to center will decrease throw, and away from center
will increase throw. Work with a combination of the two
to achieve the closest or exact control throws listed.
High Rate Low Rate
Aileron 3/4" up, 3/4" down 1/2" up, 1/2" down
Elevator 5/8" up, 5/8" down 3/8" up, 3/8" down
Rudder 1
3/8" right, 1
3/8" left 1" right, 1" right
Note: The above throws are a good starting
point for most flight conditions.

Exponential Settings
High Rate Low Rate
Aileron 20% 10%
Elevator 20% 10%
Rudder 20% 10%


Then you see the one i have from texasrcplanes


mm in.
Elevator Up 30
Elevator Down 30
Rudder Both 35
Aileron Up 1.1
Aileron Down 1
CG 56-66


same size plane same wing span like i said makes no sence to me at all

(in reply to BMatthews)
       Post #: 8

RE: Control Surface Deflection - 1/6/2008 3:37:13 AM   
combatpigg



Posts: 9784
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		The E Flite settings look flyable, but 1/2 inch is still a lot of aileron. 1/4 inch of aileron will fly most 1/2A planes.

_____________________________

Led Zeppelin is NOT "old fogie" music.

(in reply to layback2)
       Post #: 9

RE: Control Surface Deflection - 1/6/2008 3:46:42 AM   
rainedave



Posts: 5171
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online 		What the E-flight manual isn't telling you is that you lose resolution and leverage when you move the pushrods in on the control horns and out on the servo arms. This is very noticeable when flying the plane.

Start with the pushrods set up as I described in post #4 with your radio's EPA's set at 100% each way. Then, if you need more throw increase the EPA to greater than 100% first. Try to avoid moving the pushrods, but if you have to, do it at the control horn, not at the servo.

It is truly amazing how much better planes fly when you have maximum resolution. I've seen too many poor flying models that could be cured simply by attaching the pushrods the correct way.

David

(in reply to layback2)
       Post #: 10

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