Re: [RCSE] 2.4 G Futaba v JR, ..... Thanks :-)
On Dec 4, 2007, at 11:07 PM, Kevin O'Dell wrote: As far as Spread Spectrum systems. From purely an engineering point of view, the Futaba system is by far more reliable.. Sure the JR system might work just fine. Although we have already heard reports of problems with satellite receivers... But true Spread Spectrum is the only way to go and I would not buy any 2.4 system that doesn't have it JR's Direct Sequence Spread Spectrum is true spread spectrum, as is frequency hopping that Futaba uses.the only reports I have seen are problems that can't be traced to the radio..in a very hostile RF environment (some major metro areas) Frequency Hopping Spread Spectrum (FHSS) can have latency issues..you won't loose any packets because the data is error correcting but, you might have a delay in the data packet getting there...this will slow the response time of the system, but not break itThe DSSS system can have an issue with signal fading depending on the number of and orientation of antennas in the aircraft.as well as the construction of the aircraft..all carbon birds might not present a great environment..but this also can happen in FHSS systems...under most circumstances, both systems provide a solid, interference free link. At this point, most SS applications outside the RC world have dropped the FHSS and gone with the DSSS...in IEEE 802.11 both FHSS and DSSS were standardized for 1 and 2 Mbit/s data rates.with 802.11b and beyond FHSS was left behind and DSSS was standardized for 5.5 Mbit/s and 11 Mbit/s data rates..so if the data rates increase, they may have to shift to DSSS. Kevin O'Dell N0IRW
Re: [RCSE] 2.4 G Futaba v JR, ..... Thanks :-)
If you bought a transmitter one year earlier you would have gotten the Futaba 8ua you would not be flying because you would not be able to program it. - Original Message - From: Craig Allen To: soaring@airage.com Sent: Tuesday, December 04, 2007 6:45 PM Subject: [RCSE] 2.4 G Futaba v JR, . Thanks :-) I just want to thank everyone for the very thoughtful and informative post. I was expecting a lot of flames :-) hehe Just a little background... I left Soaring in 1979 after moving to LA to work in the Film Industry. I took my trusty Kraft 4ch transmitter and my Super Esprit, White Trash and Todi to Pearce collage in the Valley and watched some guys ( Probably Joe, and a few other of U hot shots Launching their home made Carbon rockets to the moon... I asked Hay were can you buy one of those gliders They all laughed at me and said You can't, you have to make them .. Oh shit :-( I went home that day and put my planes in the closet never to fly again Oh ya... My cars engine froze up on the way home to Hollywood too.. So all in all it was a very bad day. In 1999 I was back in Sac town searching the web and somehow found DLG's. WOW I was hooked... More bang for your buck !!! U bet ya... Now I had to buy a new radio.. I went to the local hobby shop and bought a Airtronics Stylus Radio Could I program by myself ?? Hell No... Then after some time I traded that for a brand new JR 10x... Could I program it??? Hell No I still have it if anyone want to make me an offer? Never used once in 4 years.. Then I went and looked at a Futaba 9c... Within 5 min I could program it. It was so so simple, just like my Apple 2 and my very first Mackintosh. I think you will notice a lot of newcomer to the hobby chose Futaba for this reason as well. So I have been flying Futaba ever since Maybe I'm missing something that I don't know about.. But time after time I see people out at the local field with Radio issues, Programing issues, and it's never been a Futaba. So what ever I might be missing, I don't miss :-))) As far as Spread Spectrum systems. From purely an engineering point of view, the Futaba system is by far more reliable.. Sure the JR system might work just fine. Although we have already heard reports of problems with satellite receivers... But true Spread Spectrum is the only way to go and I would not buy any 2.4 system that doesn't have it Just my two cents :-) Craig
Re: [RCSE] 2.4 G Futaba v JR, ..... Thanks :-)
Ha ha Ha :- Your right! As it was a brand new product when I bought it :-))) But then I would only have Woman as a hobby Hm :-) David Jensen [EMAIL PROTECTED] wrote: If you bought a transmitter one year earlier you would have gotten the Futaba 8ua you would not be flying because you would not be able to program it. - Original Message - From:Craig Allen To: soaring@airage.com Sent: Tuesday, December 04, 2007 6:45PM Subject: [RCSE] 2.4 G Futaba v JR, .Thanks :-) I just want to thank everyonefor the very thoughtful and informative post. I was expecting a lot offlames :-) hehe Just a little background... I left Soaring in 1979after moving to LA to work in the Film Industry. I took my trustyKraft 4ch transmitter and my Super Esprit, White Trash and Todi to Pearcecollage in the Valley and watched some guys ( Probably Joe, and a few other ofU hot shots Launching their home made Carbon rockets to the moon... I asked Hay were can you buy one of those gliders They all laughed at me and said You can't, you have to make them .. Oh shit :-( I went home thatday and put my planes in the closet never to fly again Oh ya... My carsengine froze up on the way home to Hollywood too.. So all in all it was a verybad day. In 1999 I was back in Sac town searching the web and somehowfound DLG's. WOW I was hooked... More bang for your buck !!! U bet ya...Now I had to buy a new radio.. I went to the local hobby shop and bought aAirtronics Stylus Radio Could I program by myself ?? Hell No... Thenafter some time I traded that for a brand new JR 10x... Could I program it???Hell No I still have it if anyone want to make me an offer? Never usedonce in 4 years.. Then I went and looked at a Futaba 9c... Within 5 minI could program it. It was so so simple, just like my Apple 2 and my veryfirst Mackintosh. I think you will notice a lot of newcomer to the hobby choseFutaba for this reason as well. So I have been flying Futaba eversince Maybe I'm missing something that I don't know about.. But time aftertime I see people out at the local field with Radio issues, Programing issues,and it's never been a Futaba. So what ever I might be missing, I don't miss:-))) As far as Spread Spectrum systems. From purely anengineering point of view, the Futaba system is by far more reliable.. Surethe JR system might work just fine. Although we have already heard reports ofproblems with satellite receivers... But true Spread Spectrum is the only wayto go and I would not buy any 2.4 system that doesn't have it Justmy two cents :-) Craig
