[NSRCA-discussion] curious

[Phil Spelt]

OK, Guys, I bit my tongue as long as I possibly could:  Dave's 
comment below is why I fly ONLY JR equipment -- the good stuff! lol, 
and flame suit on...

At 03:26 PM 3/22/2010, you wrote:
>All JR/Spektrum native systems use servo sync to simultaneously 
>update multiple channels/servos assigned to a specific control.
>
>Regards,
>
>Dave Lockhart
>Team Horizon/JR/Spektrum
>
>
>----------
>From: nsrca-discussion-bounces at lists.nsrca.org 
>[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Atwood, Mark
>Sent: Monday, March 22, 2010 2:38 PM
>To: General pattern discussion
>Subject: Re: [NSRCA-discussion] curious
>
>This will end up being somewhat of a shameless plug, but when we 
>were involved in discussing features of the new Airtronics radio 
>(SD-10G), this issues of grouping channels was a BIG deal to the 
>glider guys.  They often have 6 and 8 servos in their wing alone, 
>and having a small delay between some of the channels updating 
>creates trimming issues such that they would not be able to take 
>advantage of using separate channels if there were delays.  Having 
>such a strong presence in the glider community, they needed to 
>address it.  The result is that the new radio updates all 10 
>channels simultaneously rather than in groups of 4.   NO clue how 
>that was pulled off technically (or how they got their speed so 
>high) but both are clearly a result of these types of "threads" and 
>the resulting priority that they've placed on latency concerns.
>
>It helps that being a little late to the dance afforded them the 
>opportunity to address those concerns.
>
>I don't think it will be long before latency numbers are all low 
>enough that it won't be a critical criteria, but for now it's good 
>to see all the manufacturers taking note and making improvements 
>with each new release.
>
>-Mark
>
>Mark Atwood
>Paragon Consulting, Inc.  |  President
>5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124
>Phone: 440.684.3101 x102  |  Fax: 440.684.3102
><mailto:mark.atwood at paragon-inc.com>mark.atwood at paragon-inc.com  | 
>www.paragon-inc.com
>
>From: nsrca-discussion-bounces at lists.nsrca.org 
>[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of 
>Richard Strickland
>Sent: Monday, March 22, 2010 10:43 AM
>To: NSRCA DISCUSSION
>Subject: [NSRCA-discussion] curious
>
>
>
>The original post was in '05 in that link.  He has been updating it 
>as he gets new info.  It's worth a read--but takes a while.  Some 
>feel the thread has contributed greatly to latency being decreased 
>in radios across the board.  As someone pointed out "..radios got 
>pretty damn fast pretty damn fast..."
>Regarding Futaba modules--at least on the TM14, the information is 
>sent in groups of four, so you would have minimum latency difference 
>for example between channels 1-4, 5-8, 9-12, etc..  so it would be 
>better to have dual elevators next to one another and possibly 
>ailerons in one of the 1-4 groups if your transmitter has the 
>capability to reassign channel positions.  It would also be helpful 
>to those that have more than one servo per surface.  It's very 
>important to the helo guys as they need the swash plate to move 
>evenly.  Apparently not quite as noticeable in pattern.
>I switched from 50mhz/5114DPS to the 2.4/TM14/6008HS combo and the 
>best one word description I can give is "silky"--but it could be 
>additional latency--Futaba says there should be no difference.  I 
>think I like it--but I have to--it's what I've got!
>
>Richard
>
>PS Anyone need any DPS5114s on 50mhz.?..yeah, that's what I thought...
>
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-->There are only two types of aircraft -- fighters and targets.

Phil Spelt, Past President, Knox County Radio Control Society, Inc.
        URL: http://www.kcrctn.com
AMA--1294,  Scientific Leader Member  SPA--177, Board Member
       My URL: http://mywebpages.comcast.net/~chuenkan/
       (865) 435-1476 v  (865) 604-0541 c  
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