ORIGINAL: Oberst
ORIGINAL: Dave
There is absolutely nothing wrong with Greg Hahn's article in the November 2011 issue of Model Aviation.
After the DSM2 fiasco and the string of crashes at the Joe Nall 2011 event this was bound to come.
It is appalling that the die-hards can not take this and are calling for removal of Technical Director Greg Hahn.
If you do not like the message don't shoot the messenger.
Very true John, well said!
Greg Hahn knows quite a bit about the 2.4GHz technology in this hobby, more so than most. The FAA has nothing to do with why our hobby is getting out of the 2.4GHz system. It's the FCC that will encourage the AMA. That's not including all the reports of GHz failures that are pouring in from year to year.
Remember, the GHz operates on a light spectrum and MHz works on radio waves. If they're too many spectrum signals flooding the air at one time from other wireless systems, it can and will scramble a 2.4GHz system one is using. That is why Joe Nall and other major events is talking about impounding the GHz radio along with the MHz radios.
Huh?? Firstly radio waves are light waves, whether they are at Ghz or Mhz they are light waves.
Secondly, how is a Tx impound going to help. All the 2.4 Tx work at a similar power output (regulated btw) therefore none is sending out a signifacantly stronger signal than another. You also forget or did not know that Rx sensitivity plays a huge role in system performance.
Actually the MHz system is more reliable because it focuses on only one channel and one radio wave. Depending on voltage of the batteries in the Tx and Rx, the signal is usually very strong and direct. The only time it fails or the signal gets crazy is when someone on the same channel turns on their radio, resulting in a possible "shoot down." Another way a MHz can fail is if the range between the outgoing and recieving signal is too distant, that's why the antenna needs to be pulled out, and we don't try to fly our planes out of range.
don;t tlet the fact cloud a good story heh.... Interference can come from many sourcs not just another Tx.... but you knew that.
Because of the strict AMA Club Rules and everyone has respect for their fellow flyers- I have not ever been "Shot down" and I haven't once turned on my radio before getting a tag from impound. I also ask if anyone is on my channel. OMG that's is so hard to do! What ever am I going to do if I need to use a impound again? Time to quit the hobby those jerks!
When the light spectum becomes weak, it searches for a stronger light spectrum source aka channel. When the 2.4GHz TX scans for a stronger spectrum and is slow to find one a "brown out" will happen. If it can't find a strong enough signal at all because the spectrum is flooded, that's when the "black out" will happen and everone can say,"Bye bye to Mr. Airplane."
Err no, now you forget the whole GUID thing.. IF an Rx loses the signal it either isn't there or something has failed. The Rx onlyresponds to the signal that carries the GUIDit has been bound to.....remember that? 2.4 Rx don;lt gong looking for other Tx is their Tx signal is too weak, they go to failsafe, at least FASST Does
Greg Hahn knows this and much more. He's got his hands tied politically when it comes to manufacture sponsership and the AMA. He can't come out and say straight out that there is a major issue with the 2.4GHz system. Lawsuits would be flung from out of nowhere if he did that! Instead he hints to everyone who is smart enough to catch it to keep their 72Mhz radio's just incase their 2.4Ghz radio starts to become a issue during or before operation.
ah Greg Han can;t say it so he deligated you to run out ans shout about it. A bit like Jesus telling the 12 Apostles to go forth and multiply because he could'nt... His hands were tied apparently
Sorry to burst anyones bubble, but the MHz systems are here to stay, like it or not. I don't mind new technology if it works and is dependable. When the first radios came out with the new 2.4GHz a few years ago, that's when my warning radar went off. It's like using the same system my wireless phone uses to fly my $1,000-$2,000 dollar aircraft, I'm just not going to do it.
Pete
Ah the penny drops. You're a ludite. Are you Armish? just asking