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One Heck of a Radio Glitching Problem

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Old 07-10-2003, 03:37 AM
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splais
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Default One Heck of a Radio Glitching Problem

I think I have lost two planes because of a glitch in my radio or a bad receiver.

Radio Futaba 9C, Receiver Futaba R127.

I was setting up a new plane getting ready to fly. Everything was fine during setup. After the engine started it was a whole new ball game. At idle things were ok. But whenever I started to run up the throttle a little bit all the surfaces and throttle started shimmying really badly. Needless to say we did not try to fly.

Anyone got an idea what this might be.
Old 07-10-2003, 04:14 AM
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JohnBuckner
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Default One Heck of a Radio Glitching Problem

A cracked ceramic filter is among other things a common cause of those symtoms.

John
Old 07-10-2003, 04:21 AM
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rajul
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Default Re: One Heck of a Radio Glitching Problem

Originally posted by Splais
I think I have lost two planes because of a glitch in my radio or a bad receiver.

Radio Futaba 9C, Receiver Futaba R127.

I was setting up a new plane getting ready to fly. Everything was fine during setup. After the engine started it was a whole new ball game. At idle things were ok. But whenever I started to run up the throttle a little bit all the surfaces and throttle started shimmying really badly. Needless to say we did not try to fly.

Anyone got an idea what this might be.
What's the history of your R127 receiver ? Did it go thru any crashes and how bad was the damage ?
Old 07-10-2003, 07:19 AM
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Marian
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Default Re: One Heck of a Radio Glitching Problem

I had the same problems after crashing my airplane. All servos were moving crazily even when I made "a click" on my receiver.
Probably broken ceramic filters.
Old 07-10-2003, 08:02 AM
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Default Check these out

127 Threads
Read this thread, and check the links on the last post. Let me know how you make out_bobb
Old 07-10-2003, 01:00 PM
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splais
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Default One Heck of a Radio Glitching Problem

Well after reading all this I can see I have been living on barrowed time with the R127. I lost my Majestic with this receiver in it. flying straight down the runway the plane started going crazy, rudder flapping back and forth and then lost it. When I checked everything out all seemed well so we just thought we had gotten a hit from someplace. It is clear now that this receiver probably belongs in the trash.
Old 07-10-2003, 02:36 PM
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Default One Heck of a Radio Glitching Problem

Its also a testament to the importance of doing all range checks with engine running and cycled up to full power.

John
Old 07-10-2003, 02:38 PM
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BillHarris
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Default One Heck of a Radio Glitching Problem

Don't trashcan the RX, send it in for service. Ceramic filters are not that expensive to replace.
Old 07-10-2003, 02:40 PM
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splais
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Default One Heck of a Radio Glitching Problem

PS to that. We found the problem when doing just that. The controls going crazy when running up the power and walking away. Back in the pits at idle, just fine, no problem. Power on, forget it!
Old 07-10-2003, 02:46 PM
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splais
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Default One Heck of a Radio Glitching Problem

I do not concur with sending it in for repair. I have read all those old posts about the R127's and how some are fine and some are crap and who knows what the truth is. I actually have other 127's that are fine in a couple of smaller cheaper planes.

But I now realize I have had weird things happen to planes that had a particular 127 in them.

If you already got the 127 and it is working fine, don't worry. But if you have had a problem, why spend any money fixing it. Bite the bullet and buy a higher quality Rx. Throw in dual elevator servos, a voltwatch, etc; the 127 doesn't cut it anyway. Most of my planes need about 8 channels if I don't want to use Y's.
Old 07-11-2003, 03:20 AM
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Lynx
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Default One Heck of a Radio Glitching Problem

Is it the same engine in both planes? A bad bearing could cause that.
Old 07-11-2003, 12:13 PM
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Default One Heck of a Radio Glitching Problem

I do not concur with sending it in for repair. I have read all those old posts about the R127's...
Good point and I concur. I am accustomed to using Hitec Rx's, and they are relaible and easily serviced. I tend to forget that all receivers are not created equal.

--Bill

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