Problems!! 14MZ 2.4 R6014FS

[lazun]

We do not know what the exact temprature of the IC. All we know is that the case of the RX is 130-165 degrees when it fails. I would have to say that the inside could be slightly cooler than that (shade barrier effect). So we do not know. We see it failing in 85 degree weather. Well within the limits. It is also happening to ALL the Futaba 2.4 RX out there with the same IC in it!!! The car guys as well (they do not mind too much since they just go get there car)!! So it is not the setup or a particular RX. It is all the RX with this 2.4 IC that will fail.

Back from SEA-TAC. There's Mt Rainier!!

[1bwana1]

	Quote: Originally Posted by reyn3545
	Fast Forward this conversation a few weeks... Futaba finally speaks... I'm sure they'll announce that the maximum operating temp for their receiver is somewhere around 50 degrees celcius... 122 degrees Fahrenheit. It will be the owner's responsibility to take whatever steps necessary to keep the receiver below this threshold. OK.. now what do we do? As long as there's air flowing across the surface, the heat should be taken away. On the ground, however, we're going to have to take some precautions!

I hope Futaba is a better company than that!

[Woketman]

Why do we have to wait a few weeks? Why have they not made a statement already? It has certainly been enough time to determine if this is real or not.

[Mithrandir]

	Quote: Originally Posted by Woketman
	Why do we have to wait a few weeks? Why have they not made a statement already? It has certainly been enough time to determine if this is real or not.

You might be assuming the problem is only a temp issue... this could be a problem that involves other issues that are not immediately apparent...

My company fully characterizes and qualifies our avionics and fuel systems to whole plethora of altitudes and temps.. it takes months... testing takes time if you want good data that tells the whole story.

[Woketman]

I agree. To fully characterize the exact issue down to the smallest detail would indeed take serious time. To get three guys to take ten 6014 recievers out into the lab, attach themocouples, raise the temp and see if they cut out below 180 degrees F would take less than three hours. That would at least validate that there is a thermal issue and they could say "yes, there's an issue. We are working on it". That is a LOT better than keeping us in the dark!

[ferocious frankie]

Has everyone read this on Futaba's site:

"Some battery back-up devices might have difficulties with the lower operational voltages as well, although they might not appear to initially. One such device functions perfectly on the ground and during a range check, yet when the operational temperature reaches 50° C (122° F), the device actually requires 2.8 Volts in order to function properly. As such, the servos will cease to operate properly."

Just something I found that might help some of you guys.

[Judge]

	Quote: Originally Posted by lazun
	It is also happening to ALL the Futaba 2.4 RX out there with the same IC in it!!!

I'm sorry, but you have absolutely no evidence to back this up. In fact, there have been several people who have reported that their 6014 RXs have NOT failed with high heat, so how can you say this??

This is why I keep saying that now that Futaba is aware of the issue we need to let them investigate it and find out what the root cause is and how widespread it is. But making sweeping statements such as this is not really doing any good at all. All it does is spread misinformation and is not based on any facts, just your impression of the problem.

[DougV]

	Quote: Originally Posted by Woketman
	Why do we have to wait a few weeks? Why have they not made a statement already? It has certainly been enough time to determine if this is real or not.

That’s how big companies are, I use both systems JR/Spektrum and FASST, we waited an entire year for JR/Spektrum to do something about the lock-out/Reboot issue, and they still will not admit that there is an issue "users fault", yet they came up with a band aid called “quick connect” (I said band-aid because the reboot is still there).

Let’s just see what Futaba will do now.

Just my opinion,
Doug.

[Judge]

	Quote: Originally Posted by Woketman
	Why do we have to wait a few weeks? Why have they not made a statement already? It has certainly been enough time to determine if this is real or not.

As Bax has tried to explain, they got this info 2 weeks ago this coming Monday. And Futaba was shut down for one full week due to a national holiday week. I suspect they have not said anything yet because they are still working on it. And maybe, just maybe, they know more about how fast they can figure out what is going on than we can here on the Net.

[RTK]

Judge- Your last two posts hit the nail on the head.. I know everyone is anxious, but only time will tell.

[rcflyer]

	Quote: Originally Posted by reyn3545
	Has ANYONE experienced a failure (loss of control) while flying with the 6014? There's no guarantee that a control loss would absolutely be a receiver shutdown, but lets turn our heads to that for a moment. Has ANYONE lost radio control of a plane while flying with a 6014 receiver?

Here's one report from RCU that I read http://www.rcuniverse.com/forum/fb.asp?m=7476788 . The text is as follows:

Unfortunely one of my friends fell victim to this very problem. We are in Arizona were it is common to have high temps. This particular guy was flying a CARF Superextra and is using a 14mz with the 2.4. The plane went into lock out and went straight in at full throttle. He also had the receiver up in the canopy area. We have been able to confirm that the higher temps inside the fuselage can cause the receiver to disconnect. Needless to say I think this issue at least deserves a fair investigation. I have yet to switch to the 2.4 with my 12ZAP but I have never had any issues with a properley set up PCM system. I love the idea of the 2.4 and hope this all gets resolved soon. Right now there are about 300 members at the club that are non-believers! Futaba may have a lot of P.R. cleanup to do.

[reyn3545]

I've got an Eagle Tree system.. I'm going to do some more temp testing, with covering the currently open fuse area, keeping a towel over the canopy, measuring the receiver temp with the motor running, etc..

It's supposed to rain this weekend, and I'm traveling the first part of next week, but I should have something meaningful before next weekend.... we'll see if I can beat Futaba to the web!