Kiwi's XPS test results are up.

[aramsdell]

Woketman, did you lose a plane? If you didn't then why are you soF@#Adamant about beating on JD? Do you have an uncrashed XPS rx?
Send it to me cheap.

JD, Finally figured how to open those XPS ai. files. Thanks.

[Woketman]

No, I did NOT lose any aircraft to XPS. I was fortunate that I realised XPS was crap soon enough.

The reason that I am so adamant about exposing JD is simply this: I love the sport and hobby of R/C. Been doing this since I was 14 years old in '73, originally with my dad. R/C has always, since then, been a big prt of my life. It REALLY burns my a_s when I see someone trying to scam the public with false claims, as JD did from the get-go. It damages the hobby for us all. I also am greatly saddened when someone spends LOTS of time and money on an expensive airframe (like a turbine) and is fooled into trusting it to radio gear that does not do what was claimed (as in 1st gen XPS), and then it is destroyed.

The idea is to let as many know about the questionable XPS gear BEFORE they loose money and time, NOT after!

[aramsdell]

But do you have any receivers. You probably won't be using a 8 or 10 ch in a foamie right???

[Woketman]

I still have one. An 8 or a 10 (I forget). I used it on last year's Unlimited Pinewood Derby car. For those who don't know, the Unlimited class is the Cub Scouts' category for dads where ANYTHING is allowed (except pyrotechnics). I have won, hands down, for the past two years with two different cars using a small ducted fan and LiPos. This past year, I used a brushless motor and controller. As such, I needed an R/C signal to drive it. I thought "what to use"? Then I remembered that I had that XPS RX!!! No one would be goofy enough to actuall fly that in a decent airframe, I figured. Might as well put it on a car on a captive track, where no one can get hurt!!!

There ya go, guys!!! I have demonstrated that XPS is adequate for Pinewood Derby cars(and probably small foamies, but use at your own risk)! But seriously: don't use it for a nice plane!!!! Use Spektrum, FASST, MPX, or Hitec 2.4. For god's sake, NOT XPS!!!!

[aramsdell]

How much????

[aramsdell]

Woketman, do you trust the Hitec 7ch 2.4 Rx? 1 antenna.

[JimDrew]

We do use a single antenna for our current receivers, and as videos have proved, the system did hop with the original firmware. The firmware upgrade we released in 2008 gives you 5 different hopping options (although most everything still uses the original predictive mode).

Futaba's new receivers use a single antenna, as do Hitec, and so do all of the Spektrum receivers, including their remote receiver. Those two "wiskers" form a single dipole antenna (one wire is soldered to the ground plane and the other wire is the active portion of the antenna).

We know of two turbine crashes with our system, we know of two with Futaba, and we know of a few with Spektrum. Radio systems DO NOT CARE what they are put into. There are no differences in the rules of installation based on the type of plane - the power systems must be adequate. If you have a giant scale with 8 JR8711 servos, you better be powering it accordingly. Likewise, if you have a jet with 14 servos you better power that accordingly as well. If you are flying a foamie or a pinewood derby-mobile, you still need to make sure that the power system can handle the job. This is why we created our "TattleTale" device. This device monitors the voltage every 10ms and displays (through a multi-colored LED) what the lowest voltage threshold has been since it was powered on. It also monitors the servo pulses and can tell you if there has been a glitch (72MHz) or a failsafe or reboot (PCM/2.4GHz). Since it works with any type of receiver (72MHz/75MHz/2.4GHz) it covers all of the bases. We have had some pretty interesting comments about this product, with someone actually borrowing a DSO to see if the results were accurate (when their power expander triggered a low voltage drop)... the TattleTale was right.

[Cherokee Jim]

Ordered one TattleTale to check out inflight stuff, the price is right, $19.95 and at 10 to 100ms sample times it should be able to catch any evil doings with battery voltage or loss of signal/lockouts ( missing pulse detector? ).


Happy Flying, Happy New Year Ya'll out in the R/C World!
Cherokee Jim Mahoney

[Josh Price]

	Quote: Originally Posted by JimDrew
	We do use a single antenna for our current receivers, and as videos have proved, the system did hop with the original firmware. The firmware upgrade we released in 2008 gives you 5 different hopping options (although most everything still uses the original predictive mode). Futaba's new receivers use a single antenna, as do Hitec, and so do all of the Spektrum receivers, including their remote receiver. Those two "wiskers" form a single dipole antenna (one wire is soldered to the ground plane and the other wire is the active portion of the antenna). We know of two turbine crashes with our system, we know of two with Futaba, and we know of a few with Spektrum. Radio systems DO NOT CARE what they are put into. There are no differences in the rules of installation based on the type of plane - the power systems must be adequate. If you have a giant scale with 8 JR8711 servos, you better be powering it accordingly. Likewise, if you have a jet with 14 servos you better power that accordingly as well. If you are flying a foamie or a pinewood derby-mobile, you still need to make sure that the power system can handle the job. This is why we created our "TattleTale" device. This device monitors the voltage every 10ms and displays (through a multi-colored LED) what the lowest voltage threshold has been since it was powered on. It also monitors the servo pulses and can tell you if there has been a glitch (72MHz) or a failsafe or reboot (PCM/2.4GHz). Since it works with any type of receiver (72MHz/75MHz/2.4GHz) it covers all of the bases. We have had some pretty interesting comments about this product, with someone actually borrowing a DSO to see if the results were accurate (when their power expander triggered a low voltage drop)... the TattleTale was right.

sounds cool acn you tell me about it more. will it work with other systems or just xps

[aramsdell]

	Quote:
	Do you have an uncrashed XPS rx? Send it to me cheap.

[QUOTE][I still have one. An 8 or a 10 (I forget). /QUOTE]

[QUOTE][How much???? /QUOTE]

Well? Paypal's waiting for you.

[JimDrew]

	Quote: Originally Posted by FireFighterFSFD
	sounds cool acn you tell me about it more. will it work with other systems or just xps

TattleTale works with any power system (2.0v to 16v) and with any type of receiver (MHz or GHz types).

[Mithrandir]

	Quote: Originally Posted by JimDrew
	............Futaba's new receivers use a single antenna, as do Hitec, and so do all of the Spektrum receivers, including their remote receiver. Those two "wiskers" form a single dipole antenna (one wire is soldered to the ground plane and the other wire is the active portion of the antenna)..........

I don't believe this is correct.... (If I understand what you are saying)....

The FUTABA FASST has a shielded coax with the last inch'plus with the shield removed.... I assume the shield is grounded....with two seperate antennas... I always assumed the requirement for perpendicular-to-each-other mounting was to accomodate the sensitive polorized nature of 2.4 Ghz....

Dual Antenna Diversity.... it uses the antenna with the strongest signal....

No?

[JimDrew]

Mike, my reference to the wiskers was with Spektrum, not Futaba. Futaba does in fact use shielded coax (like we do with our new receivers). Spektrum uses two pieces of wire, one soldered to ground and the other active. This forms a single dipole antenna, not two antennas as some might believe.

[Mithrandir]

	Quote: Originally Posted by JimDrew
	Mike, my reference to the wiskers was with Spektrum, not Futaba. Futaba does in fact use shielded coax (like we do with our new receivers). Spektrum uses two pieces of wire, one soldered to ground and the other active. This forms a single dipole antenna, not two antennas as some might believe.

OK.. that is the same sort of antenna recommended for my amateur TV setup.....

[aramsdell]

Wocketman, How much for the 8 ch that you don't use. Don't be stubborn. It's only a paper weight now. RIght? After all, you need the 10 ch for the Pinewood Derby...Dual front wheel servos, dual spoiler control,active shocks etc. How much. Make it worth my while and you can start to recoup and stop the complaining.



Alan