[NSRCA-discussion] S.bus

[mjfrederick at cox.net]

I found the analogy appropriate given it's our visual system that lets us know what the airplane is doing in the first place. In fact, it is the only source of information (other than the sound of the motor) that we have in regards to what the airplane is doing, and there's much more latency there due to the speed of sound versus the speed of light.

It's not like we have force feedback controls. Oooh... that would be another cool addition with the duplex ability of the new S.bus system!

Matt
---- Phil Spelt <chuenkan at comcast.net> wrote: 
But,Mark, your movie analogy only considers the 
visual system -- each sense had its own 
throughput time, plus we must consider the 
"decision making" time between aircraft movement 
and then the later stick movement reacting to 
that aircraft movement...it gets very complicated 
very fast -- good thing we don't have to think 
through every little stick input before we make 
it.  It only takes about 2 or 3 seconds to "guide 
an aircraft into premature impact with terraine"...

At 01:28 PM 7/9/2010, you wrote:
>Content-Language: en-US
>Content-Type: multipart/alternative;
> 
>boundary="_000_99B8EFCA36A5724F87FF3C71B431D87237DA4E49EAPEVM01paragon_"
>
>It’s a good question, but I think the base 
>number starts at zero.  Meaning we’re comparing 
>NO latency with some latency.  I.e. 0 -11, or 0 
>– 14 or 0 – 250.    No delay is obviously the 
>goal
though clearly impractical.   The question 
>is at what point are we able to notice the latency.
>
>I think the movie industry gives us a reasonable 
>benchmark  to work with, in that movie frames 
>are 30ms apart and we’re generally unable to 
>discern any break.   There are faster systems 
>for film that with studies are considered 
>“smoother” but I believe below 15ms there was 
>little perceivable difference (that was 72FPS if I recall)
>
>Time to go do some research
or not.
>
>
>
>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 Bill's Email
>Sent: Friday, July 09, 2010 12:01 PM
>To: General pattern discussion
>Subject: Re: [NSRCA-discussion] S.bus
>
>The next question then becomes, at what level 
>can we perceive a difference in performance? In 
>other words, can we really perceive a difference 
>between 7ms and 14ms latency? I will not argue 
>that large differences are readily perceptible 
>(25 versus 250), but what about smaller 
>differences. How large of a difference does 
>there need to be and is there a threshold below 
>which it does not really matter?
>
>
>
>Phil Spelt wrote:
>As a Psychologist, I agree with you, Bill.  As 
>an R/C pattern jockey, I will only point out 
>that the electronic latency is ADDED TO the wet-ware latency...
>
>Thus, your last statement is true, indeed!
>
>At 11:19 AM 7/9/2010, you wrote:
>
>I am amused by discussions about latency. We 
>have long discussions about the perceived 
>advantages of single digit differences in system 
>latency while ignoring the fact that the average 
>human reaction time (call it organic latency) is around 250 milliseconds.
>
>I guess you can argue that since we are 
>inherently so slow we need all the electronic help we can get!!
>
>
>
>
>
>Jon Lowe wrote:
>
>There is a great article on latency here:
>
><http://www.rcmodelreviews.com/what_is_latency.shtml>http://www.rcmodelreviews.com/what_is_latency.shtml
>
>A lot of people are hung up on 
>transmitter/receiver latency numbers, and don't 
>see the whole picture.  This gives as good a 
>fact based write up as any I've seen.
>
>Jon Lowe
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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/>http://www.kcrctn.com
>AMA--1294,  Scientific Leader Member  SPA--177, Board Member
>       My URL: 
> <http://mywebpages.comcast.net/%7Echuenkan/>http://mywebpages.comcast.net/~chuenkan/
>       (865) 435-1476 v  (865) 604-0541 c
>
>
>
>
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>
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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