[NSRCA-discussion] Rudder pull-pull

[James Oddino]

I saw Ralph Sat. morning and mentioned the switch harness.  He said he  
didn't know it existed.  I had to run off to take the grandson to his  
ball game so I never did close the deal with him but I think he  
understands the benefits.  Thanks for the support.

Jim O


On May 9, 2008, at 12:46 PM, Dwayne Brown wrote:

> Jim, I see that you flew this morning or last night with my friend  
> Ralph DePalma.  I’ve been attempting to get him to buy one of your  
> switches in that he now uses your regulator.  Dwayne in Amarillo
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org 
> ] On Behalf Of James Oddino
> Sent: Friday, May 09, 2008 11:46 AM
> To: General pattern discussion
> Subject: Re: [NSRCA-discussion] Rudder pull-pull
>
> If the arm on the servo and the control horn on the rudder are equal  
> lengths the system is linear.  One degree of servo change results in  
> one degree in rudder change at all points in the travel from neutral  
> to full throw.  We don't care how far fore and aft the push rod or  
> cables move to get these results.
>
> Jim O
>
>
> On May 9, 2008, at 6:32 AM, Mark Atwood wrote:
>
>
> Better. But let’s not get gaudy about it...lol
>
> The reality is the throw is just more linear.  With an arm, even  
> though the attachment point of the cable to the arm still moves in a  
> circular fashion (same as the wheel), the cable is not following the  
> arc.  So the angle of the cable is changing, and the relative throw  
> is decreasing as the arm is deflecting.
>
> Can you tell???  Well, it’s effectively giving you opposite expo  
> (the arm is).   Meaning the throw is more sensitive around  
> neutral.    When we used Analog servos...this was actually a good  
> thing.  The amount of blow back on our barn door rudders made the  
> first bit of movement somewhat ineffective.  But now with the  
> digital servos which operate at full torque even near center, my  
> guess is that people running an arm MIGHT...just MIGHT use slightly  
> more expo on their rudder to offset the mechanical negative expo.   
> That’s if they really notice it.
>
> I just go for the bling. :)
>
> -M
>
>
> On 5/9/08 9:24 AM, "chris moon" <cjm767driver at hotmail.com> wrote:
>
>
> I was going to put real diamonds around the edge of the wheel and a  
> neon light below it...does that count?
>
>
> Mark Atwood wrote:
>
> Re: [NSRCA-discussion] Rudder pull-pull You have a problem with  
> Bling??? Go fly Pylon...you’re not worthy of Pattern.
>
> :) :) :)
>
>
>
>
> On 5/9/08 9:13 AM, "chris moon"  wrote:
>
>
>
> Can someone explain the benefits (real or otherwise) of the pull-pull
> wheel type rudder servo arm vs. a regular servo arm? Is there some  
> real
> benefit, or is it bling?
> Thanks
>
> Chris
>
>
>
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> >
>
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