[LASS Soaring] Really guys only 40 will be flying!

[Brian Kopke]

Where did the magic number of 40 come from.  Sorry if I overlooked it in a
previous post.

Brian

On Dec 26, 2007 10:39 AM, David Gruneisen <david.gruneisen at gmail.com> wrote:

> According to Spektrum (and JR) -
>
> "In the unlikely event that all channels are occupied, the next
> transmitter will scan the band indefinitely until open channels are
> available. The transmitter will then acquire the channel(s) and begin
> transmitting. Only then will the system connect."
>
> So the 10,000 TX handsets can all be on at once - only 40 will find and
> acquire 2 discrete freqs, perform the necessary handshaking and actually
> transmit.
>
> Let's take my office environment as an example of multiple brands of 2.4ghz existing in the same environment.  There are approximately
> *60 devices* from 4 different mfgers (IBM, Dell Nortel and Linksys a *ll
> transmitting and receiving on the SAME frequency*, using only packet
> collision detection to keep the individual receivers straight.
>
> I think JR and Futaba might do well to publish the FCC's 2.4g standards
> and their successful test completion documentation to help clear up these
> very reasonable questions about using this old technology in this new way.
>
>
> -David G
>
>
> On Dec 26, 2007 9:48 AM, <GordySoar at aol.com> wrote:
>
> >  Okay Ryan,
> >
> > What keeps the other 60 to 100 guys with various brands of 2.4 in their
> > cars and pits from being on all at once? Impound?
> > gordy
> >
> >  In a message dated 12/26/2007 9:31:19 A.M. Eastern Standard Time,
> > rdwoebke at hotmail.com writes:
> >
> >
> > I don't know about the rest of you all but I have seen the # of
> > concurrent systems limitations in a lot of the litareture out there on the
> > Spektrum and the Extreme.
> >
> > The way Spektrum works is if it can't grab the 2 channels to opparate
> > the receiver simply won't start "working".  So, assuming we are all being
> > good about doing our "wiggle checks" and if we are doing a good job of
> > checking our "blinkies" as suggested by Don Richmond, should not be an issue
> > there.
> >
> > http://www.spektrumrc.com/DSM/FAQ.aspx
> >
> > So far as our soaring goes, I think it is unlikely we will exceed the 40
> > "channels" at a soaring event.  Take the Nats for example, there might be
> > pilot groups of 10, so perhaps there could be 10 guys turned on and waiting
> > at the winch staging area, 10 guys launching and 10 guys in the air soon
> > landing, but that still leaves 10 channels and perhaps a few guys "in the
> > pits" might have radios on fiddling with trims/etc, but worst case one of
> > the 10 guys that is turning on at the staging area just lets the "round
> > master" know he can't get a free channel.
> >
> > Hope you all had a good Christmas.  I got some servos to help complete
> > Psyko #2.
> >
> > Ryan
> >
> >
> >
> >
> > ------------------------------
> > From: GordySoar at aol.com
> >
> > Correct me if I am wrong but I believe the general modeler believed that
> > with 2.4 all concerns for freq control were over....Millions could all
> > be on at once...there was the story about the huge heli event with hundreds
> > of attendees most enjoying the freedom of 2.4....hmmmn.
> >
> > Did you all believe that the amount of 2.4 TXs on at once was almost
> > unlimited?
> >
> >
> >
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