[NSRCA-discussion] [SA] Help: Elevator Setup on JR10X

Fri Jun 2 10:10:52 AKDT 2006

Thanks, George.  I have had a lot excellent suggestions including yours. 
The plane in question is a 40% Extra so I am using SWB metal arms- only one 
one leg.  Even so, I could try swapping arms- I have a few others that I 
could use- and see if that helps.

Thanks Again-

Dave

----- Original Message ----- 
From: "george w. kennie" <geobet at gis.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Friday, June 02, 2006 1:48 PM
Subject: Re: [NSRCA-discussion] [SA] Help: Elevator Setup on JR10X

> David,
> Another thing you might want to consider is the orientation of the servo 
> arm
> positionally as installed on the two individual servos. The output spline 
> on
> the servo shaft has an odd number of teeth, making it possible for you to
> reposition it to an position where the amount of sub-trim you have to 
> employ
> is minimized.Example:if you were using a futaba 4-leg output arm, you will
> notice that they are numbered one to four. If you keep taking the arm off
> and reinstalling it in a different position you will find that there is a
> position that will give you almost perfect centering. In your situation if
> you were using the output arm identified as number one on one elevator 
> half
> you would have to use an arm numbered (x, maybe number one)whatever will
> give you the same degree of centering so that the sub-trim values will be
> close to the same. I think the sub-trim values may be the culprit and not
> necessarily the ATV. If you move the pushrod further out on the output arm
> the discrepancy will be amplified and I would rather see you preserve your
> resolution.
> I know that I've been using Futaba as an example here, but I just counted
> the teeth on a JR arm and the count is 23 as opposed to Futaba which is
> 29(as I recall), so I feel sure that the same principle is involved.
> Hope this helps, but then again, I could be all wet.
> Georgie
>
>
> ----- Original Message ----- 
> From: "Dave Michael" <davidmichael1 at comcast.net>
> To: <mini-iac at yahoogroups.com>; "'NSRCA Mailing List'"
> <nsrca-discussion at lists.nsrca.org>
> Sent: Friday, June 02, 2006 7:41 AM
> Subject: Re: [NSRCA-discussion] [SA] Help: Elevator Setup on JR10X
>
>
>> The suggestion that I am getting most often is that the issue stems from
>> using ATV/End-Point in excess of 100% and sub-trims, both of which I am
>> using.  I can't eliminate sub trim as I need to adjust center so that 
>> both
>> arms are 90 deg to the hinge line- however, the ATV/End-Point can be
>> eliminated by moving the control rod attachment point further out on the
>> servo arm.
>>
>> I was trying to set the plane up without 3D throws- to get the best
>> possible
>> mechanical advantage- so I am using the servo arm hole closest to the
>> servo.
>> I'll change the ATV to 100 or less and move out on the servo arm and see
>> what happens.
>>
>> Dave
>>
>>
>> ----- Original Message ----- 
>> From: "Michael Glavin" <mglavin at surewest.net>
>> To: "'Dan Knippen'" <dknippen at sbcglobal.net>; "'Dave Michael'"
>> <DavidMichael1 at comcast.net>; <mini-iac at yahoogroups.com>; "'NSRCA Mailing
>> List'" <nsrca-discussion at lists.nsrca.org>
>> Sent: Friday, June 02, 2006 2:18 AM
>> Subject: RE: [SA] Help: Elevator Setup on JR10X
>>
>>
>>> Dave
>>>
>>> A curve is not available to the best of my knowledge.
>>>
>>> Look very closely at the mechanical setup. I suspect as other that
>>> something
>>> is amiss here.
>>>
>>> Are your ATV/End-point settings the same on both channels?
>>>
>>> Is Sub-trim in play?
>>>
>>> Any time you introduce an offset such as sub-trim or an unequal 
>>> end-point
>>> percentage you'll realize some variables in performance as compared to
>>> another channel without same. Careful mechanical set-up eliminates most
>>> of
>>> these problems.
>>>
>>> Michael Glavin
>>>
>>>
>>> -----Original Message-----
>>> From: mini-iac at yahoogroups.com [mailto:mini-iac at yahoogroups.com] On
>>> Behalf
>>> Of Dan Knippen
>>> Sent: Thursday, June 01, 2006 5:43 PM
>>> To: Dave Michael; mini-iac at yahoogroups.com; NSRCA Mailing List
>>> Subject: Re: [SA] Help: Elevator Setup on JR10X
>>>
>>> Dave,
>>>    I will probably doing the same thing on my next plane, but I didn't
>>> anticipate that problem. Yiks ! Sounds like one arm on one of the
>>> elevators
>>> is different than the other mounted in the stab?  I'm thinking servo
>>> speed
>>> but everything seems fine on down Ele. ? Push rod lengths equal ? Good
>>> question?... Let us know what happens.
>>>                                    Dan k
>>>
>>> Dave Michael <DavidMichael1 at comcast.net> wrote:
>>>  All,
>>>
>>> I am setting up a new plane using the wing type mix (22) for an elevator
>>> servo on each half, plugging into the elevator and AUX3 ports as
>>> instructed.
>>>
>>> Using the stick on each of the elevators coming together at a single
>>> point
>>> behind the rudder to check tracking. I am finding that the elevators are
>>> aligned at center and at full up and down elevator.
>>>
>>> I am also finding that the elevator on AUX 3 starts earlier and reaches
>>> full
>>>
>>> throw earlier than the other elevator and thus tracks with greater throw
>>> on
>>> that half than on the other half anywhere between neutral and full 
>>> throw.
>>> This is happening with up elevator only- not down elevator.
>>>
>>> I am hoping I can set up some sort of curve one one half or the other so
>>> that I can match the two elevators perfectly (well, as perfectly as
>>> possible). Has anyone done this and what are the steps?
>>>
>>> Thanks,
>>>
>>> Dave Michael
>>>
>>>
>>>
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>>
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