[NSRCA-discussion] ball links

[rcaerobob at cox.net]

For me, the real issue with the ball links on the servo side is the height of the twisting force against the arms.  If you use stock nylon arms (even Dubro "strong" arms), a ball link generates enough twist in a high load maneuver to let the control surface deflection sag.

This can be completely addressed using Airwild or H9 aluminum arms, but most hesitate to spend $8 per servo to make a ball link work.

On the other hand, many "believe" ball links cannot work, so therefore, they DO NOT WORK.

I've used 'em, with alum arms, work fine.
But still prefer my "simple is better" approach using nylon 2-56 clevises on nylon control takeoffs in nylon servo arms.  Never get slop, thus never having shock-load slop-induced component failure.

It's what I'm doing - again - on the Tojeiro now.
> 
> From: Stuart Chale <schale at optonline.net>
> Date: 2006/04/04 Tue AM 11:25:31 EDT
> To: geobet at gis.net,  "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> Subject: Re: [NSRCA-discussion] ball links
> 
> Thanks.  I am talking about what I had been told over 10 years ago.  Most
> people referring the the dubro ball links.   I think the helicopter style
> ball links make a lot of sense at least on the servo side.
> 
> Thanks,
> 
> Stuart
> 
>  
> 
>   _____  
> 
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of George Kennie
> Sent: Monday, April 03, 2006 8:39 PM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] ball links
> 
>  
> 
> That must have been a clinic that I missed. I have used Excel units in
> several applications including Elevator with excellent results. Just make
> sure that the horns and arms are rigid components to avoid any twisting
> effects.They are absolutely slop-free and absorb all angular deflection
> anomolies throughout the full range of motion. 
> I LIKE 'EM !!! 
> G. 
> 
> Stuart Chale wrote: 
> 
>   
> 
>  
> 
> Is anyone using helicopter style ball links on servos and surfaces?  Seems
> like we were taught to shy away from ball links in the past but they seem to
> hold up under pretty heavy loads on the big choppers. 
> 
>   
> 
> Thanks, 
> 
> Stuart
> 
>  
> 
> 
> 
> 
> 
>   _____  
> 
> 
> 
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>   
> 
> 
> 

Bob Pastorello, El Reno, OK, USA
rcaerobob at cox.net
www.rcaerobats.net
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