[aprssig] smartbeacon fast rate

[William McKeehan]

I picked the 60MPH for easy calculations :-)

I did not realize until I saw this note that corner pegging is disabled above
the fast speed.

I guess in a similar line of thought, increasing the slow speed to 10 MPH or
something similar would prevent multiple beacons while trying to find a
parking place at the mall.
-- 
William McKeehan

On Thu, May 24, 2007 11:19 pm, Wes Johnston, AI4PX wrote:
> I've seen in several posts in the past few days a couple of people
> setting their fast speed from anywhere 65 to 90mph (presumably) in
> automotive use.
>
> I set mine much lower, about 45mph.  When I set it I ask myself this
> question... will I be turning off of a major road at more than XX
> miles per hour?
>
> Corner pegging is great.. but in the end it makes my car a little more
> "chatty" than it would be if travelling in a straight line.  I want to
> make my car as less chatty as possible when I'm travelling on the
> interstate for example.... so I set my fast speed just above the point
> at which I expect to exit the interstate or turn off the main highway
> into McDonalds.  Honestly 35 to 45 mph is fine.  Check your
> speedometer the next time you turn off a main road into a subdivision
> or mall parking lot.  5mph above the fastest speed you'd expect to
> make a 60 or 90 degree turn is where you want to set the fast beacon
> speed.
>
> For me, it's slow rate at 1 mph, high speed at 45mph.  If I'm
> travelling faster than 45, I won't be making any sudden turns, so why
> allow corner pegging to be enabled at hiway speeds?
>
> The way I learnt this was observing my basic stamp running on a laptop
> as I travelled between two main towns.  I made it print out a bunch of
> variables and began to see WHY it was triggering so much.  There are
> so many variables in smart beaconing that w/o a display, it's hard to
> know which thing caused it to beacon.  One outstanding reason was I
> had the high speed rate set over 65mph, and was travelling 50mph on a
> stretch of road that had a long slow turn in in.  The doggone thing
> beaconed twice before I got out of the curve!  It occurred to me that
> if anyone was dead reconing me, they wouldn't need to see my car
> pegging even once in a long slow curve in the road... they'd _know_ I
> was on the interstate and that I had to be going down the road.  Now
> on city surface streets, it's a different story.
>
> Just food for thought.
> Wes
> --
> In theory there is no difference between practice and theory.
>
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