| >At least they answered the question concerning the DX6 system's range (1,000
| >ft.). I don't recall seeing that anywhere else.
| I don't think Horizon/Spektrum would agree with that figure, Ed.
I don't actually recall Spektrum giving an actual range, but tests
have shown it to be about 2000 feet.
| A member of my club with a tendency to be conservative enlisted
| another to take his DX6-equipped Easy Star to an identifiable point
| (on a topo map) 1760 feet away on a hillside within LOS. No sign of
Glitching on PCM or the SS stuff is different than glitching on PPM
gear. There will be no servos moving madly about -- they'll just stay
still, not do what your TX tells them to do. So it's possible that at
1700 feet that only a small fraction of the frames were getting
through -- enough that you could still fly the plane, but it's so far
away that you didn't notice that it wasn't responding very quickly.
Either way, this chart that XPS just put out at
http://www.xtremepowersystems.net/ is pretty biased. `Radio speed'
doesn't matter. `Frequency hopping' isn't nessesarily a good thing or
a bad thing. For a resolution above 1024, nobody's gonna notice. And
since they're not producing their own all-digital TX, you're limited
to the 10-12 bits of resolution you'll get out of your radio -- looks
like 12 is the absolute maximum, so that's only 4096 -- not the
claimed 65536, even if their system can handle it.
Operating voltage? Some niche applications might care, but most
won't. They didn't try very hard to figure out the DX7 warranty --
two minutes on google told me that it has a 3 year warranty.
Telemetry/bi-directional, that's a potential real feature. But I
didn't think the initial XPS units would have that ...
But they forgot the most important bullet points ...
Can buy now: Yes Yes No No
Proven Track record: Yes Yes Yes/No No
(Yes/No = Futaba has a proven R/C track record, and even with spread
spectrum R/C gear, but this model is unproven.)
| Single data point of no statistical significance - but I doubt that
| the figure cited by a competitor deserves any more credence.
Yeah, I wouldn't trust it too much.
That said, if the XPS stuff comes out and lives up to the hype, I'll
probably plop down several hundred dollars and start migrating my more
commonly flown planes. But I'm not holding my breath.
Doug McLaren, email@example.com
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