Pinecone
01-05-2008, 06:27 PM
Only conductive stuff. So CF, metal.
Basically there are thousands of Rxes out there, flying many thousands of flights and a few reported problems. Probably less problems than 72 for the same number of Rxes and flights.
DavidH
01-05-2008, 06:33 PM
Only conductive stuff. So CF, metal.
Basically there are thousands of Rxes out there, flying many thousands of flights and a few reported problems. Probably less problems than 72 for the same number of Rxes and flights.
I have never seen all the problems posted with 72mhz that is being posted with some of the 2.4ghz. And I know there were a lot more 72 mhz systems than there is 2.4 ghz systems. Never saw any polls about power problems, having to rebind, etc. etc. with 72 mhz.
2.4 is in its infancy as for being used in this hobby. Now that more people that are using , certain problems are starting to surface. I know of one radio manufactuer that has been conducting some tests and has found out some interesting issues.
David
th3tick
01-05-2008, 06:41 PM
II know of one radio manufactuer that has been conducting some tests and has found out some interesting issues.
Can you elaborate?
Danal Estes
01-06-2008, 12:53 AM
DON"T BE SCARED!
The number of flyers in this area with ZERO, and I repeat, ZERO issues with Spektrum DX6, DX7, and x9303 is HUGE. The "I haven't heard this about 72" is because it is so common with 72 that people don't bother to post...
Example: At the 114thRC in Grapevine Texas, there is a stack of pre-printed forms in the freq card box to report 72Mhz problems to the club's frequency committee. The club regularly uses a couple of different frequency scanners to try to track down problems. In a given year, there are a number of confirmed incidents of 72Mhz interference, ranging from some glitching to total shootdowns. We get a lot of those forms, filled in with incidents, in any given month (I'm one of the scanner jockeys). These NEVER make it to the internet, BECAUSE THEY'RE JUST TOO COMMON. (The cards have dropped off in the last year or so, because so many people moved to 2.4. More below)
At that same club, there was a recent fly-in. About 60 registered pilots. So few 72Mhz radios, I think about 7, that we didn't impound (we just told the 72 guys to talk to each other, and, of course, for the 2.4 guys it just worked). Meaning that nearly every body there flies a 2.4G radio of some sort. Mostly spektrum, but a couple of Futaba and one XPS. THEY JUST WORK. No issues with these guys, and I'm around them all the time. Many different aircraft and helis, many different installs of every kind of RX, and on and on. All just work.
In Mt. Pleasant last fall, 70+ pilots, fewer than 15 impounded 72 radios. All the crashes I saw were dumb thumbs!
Sorry to be repetitive, but reading this (and other) internet forums can give the impression that this 2.4G stuff is "too new" and "troublesome" and so on. Absolutely untrue. There are some problems, but it is so much better than 72Mhz ever thought about being...! Heck, look to your latest AMA magazine: IRCHA was the largest RC event of any kind, ever, and was totally dominated by 2.4G systems. Notice that there was nothing in that article about LVreboot or Shadowing or anything else?
Use a semi-decent power supply and just go fly! Don't worry about shadowing, short of wrapping both RXs in foil (or completely inside CF that seals in ALL directions, like in a glider), you just aren't going to have a problem. Stuck on the side of CF is fine. Stuck on a foamy opposite the battery is fine. Shadowing is a non-issue, because of the freq/spatial/antenna redundancy. Really, the AR6000 on my T450 is right on the side of the frame; looks shadowed as heck, no glitches ever. We've stuck an AR7000 in a testbed aircraft with the servo wires literally wrapped around all the antennas on both the base and the satellite; the most horrible install we could come up with (short of that foil wrap). No issues. The data logger confirms this on my AR9000 on Logo 10: Both base antennas resting on coiled up servo wires which in turn are on a carbon tray, very rare to see a hit on either of these antennas and never a dropped frame.
DON'T LET THE FORUMS SCARE YOU. Pick your favorite brand and go 2.4. I happen to believe that Spektrum has a huge lead in features, but pick whatever brand you like... it really is hard to describe how nice it is to fly without EVER waiting for a freq... not to worry about that other guy on your channel forgetting and power up "just to check something real quick" (i've had that happen), and so forth.
No system is perfect, but the 2.4G stuff is SO MUCH BETTER.
OK rant over. :lol:
Pinecone
01-06-2008, 08:23 AM
I have never seen all the problems posted with 72mhz that is being posted with some of the 2.4ghz. And I know there were a lot more 72 mhz systems than there is 2.4 ghz systems. Never saw any polls about power problems, having to rebind, etc. etc. with 72 mhz.
2.4 is in its infancy as for being used in this hobby. Now that more people that are using , certain problems are starting to surface. I know of one radio manufactuer that has been conducting some tests and has found out some interesting issues.
David
72 MHz has been glithcing since day 1. Look back even a year ago and the problems with people trynig to run PPM in helis.
72 MHz Rxes don't reboot, so you get a momentary glitch, instead of a longer one (although newer Spektrum Rxes relink faster). If you don't think 72 MHz has power problems, check out the things the Giant Scael guys go through. Multilple Rxes tied to different controls so loss of signal on one doesn't cause a total loss of aircraft.
Go over to RCG groups and check out the two LONG threads on problems with the ParkZone T-28 due to power problems, digital servos amd marginal Rxes.
Problems on 72 are just too common.
And think about it. How long has Spektrum been out? How many problems have you seen posted? Look at the poll in this section.
And I KNOW people are blaming reboot problems on their own stupid thumbs. :)
NO RF LINK IS IMMUNE TO PROBLEMS. Even Nasa loses contact at times, and they spend a bit more for robust error corrrecing RF systems. :)