Independent tests prove lack of frequency hopping with XPS

[KrisW]

	Quote: Originally Posted by zoomer260
	Now, now Kris ol' buddy, no need to get nasty. What I said was completely true and you confirmed it by saying you jumped on the FM PPM bandwagon because it was the "next greatest thing". All I said that had anything to do with what YOU said was the "potentially unguided missile" part. Which if you can't get it through your head that ALL our planes are potentially unguided missiles you completely missed my point.And Kris, sorry to vent and it doesn't all concern you. Just that I don't understand how a .40 size plane turning 14000 rpm going 150 MPH can be in any less need of all the redundency and "safety factor". And I have survived several "potentially fatal" injuries so yeah, I feel very lucky.

And THAT is WHY we stand under the shelter when some people fly. . ya see. . the majority of that FM PPM stuff is in SMALL planes. . . . . . and small planes getting glitches are just as deadly as big ones with PCM lockout, perhaps more so, because PPM glitches happen a lot more often than PCM lockouts, and there are 50 small planes for every 40%er.

Thanks for making my point for me.

One last thing. .it's not "protecting the investment". . . it's protecting everything form a potential problem. . plane, equipment, innocent bystanders, grandpa with his PPM controllled trainer in the pits next to me. We use redundant systems to guard against ANY problem bringing the plane down in a bad way, and possibly hurting/killing someone. I've intentionally dumped a trainer, 45% Weeks Solution, 38% 260, and a Comp-Arf 40%er. All had suffered catastrophic control damage/loss or structural damage and were barely controllable, even though the radio gear was working as advertised (trainer got midaired, Weeks lost the top wing, 260 lost the elevator horn assembly, and the Comp twisted the fuselage in a blender)

But, I never lost the radio gear on them, and I was not flying on PPM. And unlike you, I've never had a scratch at the flying field. . I don't intend to start any time soon. Maybe being that little bit more safety cautious, and standing under the shelter, has kept me from those "potentially fatal injuries" that seem to plague you.

[buttface]

I have heard there will be a picket line in front of the XPS booth at Toledo this year. I will be there!Who else is gonna picket with us?

[KrisW]

	Quote: Originally Posted by buttface
	I have heard there will be a picket line in front of the XPS booth at Toledo this year. I will be there!Who else is gonna picket with us?

And Video, live, would be even better ! ! ! !

[Reza]

I guess I'm going to miss this year's Toledo

	Quote: Originally Posted by KrisW
	And Video, live, would be even better ! ! ! !

[zoomer260]

Kris okay. I've decided that 2.4 is the way to go. I'm going to get the best I can afford.

If you personally have not lost a plane due to radio link issues why are you in this thread ?

You've flown PPM without losing a plane. You've flown PCM without lockout obviously or that would have you tossing your Rx's in the can (THAT'S SCARY). The "hit's" on PPM can be seen and the plane grounded as you yourself point out.

I don't want or need to get in the now passe' argument of PPM and PCM. Lost plane to PCM, never lost plane to PPM. Plan to go to 2.4 over the "idiot" turning on issue. No other reason.

I've got a JR PCM reciever I'll even pay postage on to send to you. Great shape, crashed only once and given a clean bill of health from horizon. PM your address.

[buttface]

2.4 is the way to go. As long as you don't consider XPS as an option.

[jonkoppisch]

Interesting post... It probably wont last long though...

http://www.rcgroups.com/forums/showp...&postcount=127

[buttface]

Yea JD will sweep that post under the rug fast.

[ricoalonso]

Don't worry, I've got it in .pdf format if that happens

[zoomer260]

	Quote: Originally Posted by KrisW
	And THAT is WHY we stand under the shelter when some people fly. . ya see. . the majority of that FM PPM stuff is in SMALL planes. . . . . . and small planes getting glitches are just as deadly as big ones with PCM lockout, perhaps more so, because PPM glitches happen a lot more often than PCM lockouts, and there are 50 small planes for every 40%er. Thanks for making my point for me. One last thing. .it's not "protecting the investment". . . it's protecting everything form a potential problem. . plane, equipment, innocent bystanders, grandpa with his PPM controllled trainer in the pits next to me. We use redundant systems to guard against ANY problem bringing the plane down in a bad way, and possibly hurting/killing someone. I've intentionally dumped a trainer, 45% Weeks Solution, 38% 260, and a Comp-Arf 40%er. All had suffered catastrophic control damage/loss or structural damage and were barely controllable, even though the radio gear was working as advertised (trainer got midaired, Weeks lost the top wing, 260 lost the elevator horn assembly, and the Comp twisted the fuselage in a blender) But, I never lost the radio gear on them, and I was not flying on PPM. And unlike you, I've never had a scratch at the flying field. . I don't intend to start any time soon. Maybe being that little bit more safety cautious, and standing under the shelter, has kept me from those "potentially fatal injuries" that seem to plague you.

You misunderstood my repy to your "feeling lucky punk" comment. I have never been injured at a flying field. Never hid under a shelter either.

Most recently I was "lit up" by a 480v motor that was ungrounded while I was close by in water.

I've been shot in a attempted car jacking.

I've been T-boned in a car.

I've been forced to the shoulder of the road by a car while riding my bike and hit a telephone pole at about 50 MPH give or take.

So yeah, I feel and have been told how lucky a "punk" I am.

I have however seen more serious injury from small planes than large. Mostly due to "dumb thumbs" or a careless operator. I'm sure though that anytime someone attempts a "hemple" will have everyone looking for shelter. Except for me I guess, it's like a train wreck, seemingly happens in slow motion and you just can't look away.

Curious though. Ever run two Rx in a say six foot plane ? Why not ?

I'm also suprised that you refer to "granpa" in the pit's next to you. At 50 if you are not a grandpa you are missing out big time. I expect in about 8-10 years I'll be a "Great Grand pa".

Sorry everyone. I digress. Name calling seems beneath this site and I appologize for even commenting on it.

[Woketman]

This attitude that PPM is crap is foolish. The absolute BEST RF link I have EVER had in 35 years of flying R/C is the Multiplex IPD receivers. They are PPM combined with signal processing to allow fail safe, when required. FAR FAR better than my experiences with Futaba & JR PCM, really! MPX IPD is as bullet proof as it gets on 72, in my experience. Perhaps a Weatronics type set-up is better, but that is high $$$.

[LangerLad]

I have to agree the Multiplex IPD Rx's are about as good as it gets on 35 in my experience. Tried PPM n PCM in the past but have never had a problem with the Mpx's and so I use them in most of my models but I've started to you the Berg type Rx's which, I believe, use a similar signal processing system in my smaller models and electrics again without problems.
I don't think 72 and 35 and the rest are dead just yet!

[BZFrank]

XJet, looks like your prediction about XPS telemetry was right.

http://www.rcgroups.com/forums/showp...0&postcount=27 http://www.rcgroups.com/forums/showp...6&postcount=31

It will not be real time but a logging system for later playback on a PC/Laptop.

Frank

[BaldEagel]

	Quote: Originally Posted by Woketman
	This attitude that PPM is crap is foolish. The absolute BEST RF link I have EVER had in 35 years of flying R/C is the Multiplex IPD receivers. They are PPM combined with signal processing to allow fail safe, when required. FAR FAR better than my experiences with Futaba & JR PCM, really! MPX IPD is as bullet proof as it gets on 72, in my experience. Perhaps a Weatronics type set-up is better, but that is high $$$.

The first mention of PPM being **** is the one above, all I have been saying and I belive others is that on an interfearance prone site PPM can not be used without glitches, and if you have XPS without locking out.

On the Multiples IPD system are they Dual Conversion? half way to PCM?

Mike

[Flyfast1]

	Quote: Originally Posted by BZFrank
	XJet, looks like your prediction about XPS telemetry was right. http://www.rcgroups.com/forums/showp...0&postcount=27 http://www.rcgroups.com/forums/showp...6&postcount=31 It will not be real time but a logging system for later playback on a PC/Laptop. Frank

Actually XPS said today that they will be offering both options: an LCD display that can be mounted on a transmitter and the Telemetry Station that plugs into a PC. Both provide real time data and alarms. I think it would be great to have both!

-Also, since this thread was originally about the frequency hopping feature of XPS, they did provide an update that the next firmware update will include the ability to change channels when interference makes the current channel unusable. I look forward to having this additional functionality and the telemetry options.

-Ed B.