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HelicopterRadio - Servo - Gyro - Gov - Batt › Spektrum RX failure
09-03-2009 03:01 PM  8 years agoPost 1
Melnic

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Columbia, MD,USA

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I just finished a flight on my EXI 500 and as I was about to land I was hovering level about 12' feet up and suddenly the pitch dropped to about -2 to -4. RPMS of motor were still going and it dropped to the grass in about 1 second or less. I was lucky, it hit and then the skids broke but no boom strike or any other visible damage. Maybe the spindle may be bent or mainshaft. I will have to check it out.

This AR6200 has about 50+ flights on it. 25+ from the EXI and the balance from a fixed wing plane that had a gentle crash. Never saw any issues before. I'm thinking it went into failsafe and maybe I did not set my throtle for the failsafe after I set up the heli. I will check that later.

Anyone have sudden dropout like this before with an AR6200?

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09-03-2009 05:55 PM  8 years agoPost 2
MMike

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Holland,Mi-USA

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Was it a low humidity day? Belt drive?

I've had lots of resets with my EP100 indoors. Dry conditions. AR6100.

They say to spray the belt. As soon as I did, all resets stopped.

I learned about it on this show.

Scroll down to show # 25. "Follow ups". Spektrum Demon.

http://allthingsthatfly.com/Archive...=2007&month=Nov

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09-03-2009 07:08 PM  8 years agoPost 3
Melnic

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Columbia, MD,USA

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Belt drive.
48% humidity which is kinda dry for this time of the year.
I normally periodically spray w/ silicone but have not in a while.

Maybe it is static.
I think I read that you need to ground the boom to the motor mount or something? if so, it's only 3" from the metal boom mount to the motor block. I can use wires with the circular lugs from work that are pre-made to ground it.

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09-03-2009 08:28 PM  8 years agoPost 4
racin06

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Indianapolis, Indiana

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Anyone have sudden dropout like this before with an AR6200?
Yes, the AR6200 in my T-28 Trojan, as well as two AR6100's in my Sukhoi and HBK2. I had several incidents with all three aircraft in which the receivers were going into fail safe mode. Of course, if you have three receivers losing RF connection, then it's pretty much your tx that is the culprit, which was my case...my DX7 was found by Horizon Hobby to have a defective antenna. So, if you haven't had this happen to any of your other Spektrum receivers, you can probably be assured that it's your AR6200 that has the problem.

Also, does your AR6200 have the latest firmware upgrade...the upgrade with the quick reconnect function in case of a low-voltage condition? If it doesn't, then there would be a delay up to several seconds before reconnection between the rx/tx, which could appear to be fail safe being executed, when in fact, it isn't.

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09-03-2009 08:51 PM  8 years agoPost 5
Melnic

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Columbia, MD,USA

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I"ll check up on the AR6200's version. It's I think it's about 6-8 months old.

EDIT: Reading this write up from another post (below), I know my Rx and Satellite will blink if I cycle power to the Rx w/o cycling power to the TX.
First do this test to make sure both the satilite and main receivers have the latest firmware. Turn on the Tx, then the Rx, they should both come on solid. Turn off the rx and turn it back on. They should both flash and the system should connect instantly. If they don't both flash indicating a power failure, send it in for a firmware update.

If both lights flash you have the latest firmware.

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09-03-2009 09:59 PM  8 years agoPost 6
MMike

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Holland,Mi-USA

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Racin
f you haven't had this happen to any of your other Spektrum receivers, you can probably be assured that it's your AR6200 that has the problem.
Good thought. Entirely possible. However, it's been found certain helicopters are prone to static reset. The TREX500 belt drive is one of them.

Maybe this heli is TOO much like a TREX500.

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09-04-2009 01:40 AM  8 years agoPost 7
racin06

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Indianapolis, Indiana

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Whatever the cause of the problem is, it sure sucks to watch your airplane or heli drop like a lead balloon when the Spektrum receivers initiate the fail safe function .

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09-04-2009 02:04 AM  8 years agoPost 8
MMike

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Holland,Mi-USA

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Fer sher!

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09-04-2009 04:34 AM  8 years agoPost 9
Thumpernator

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Senoia, Georgia, USA

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Melnic,

Just curious, but a couple of questions if ya don't mind. Did you or have you done a range check? Don't know how you do it on your particular radio, but on the 9303 you hold the Bind button with the Tx already on. This puts out a weak signal and you check the range.

Also, how far away from the main receiver is the satellite receiver?

Thanks.

Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk

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