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Sep 28, 2015, 09:21 PM
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Just crashed with Futaba T7C


I've had this radio for a few years and it has a new battery. I just crashed a Redwing RC MXSR 30 cc plane tonight and have to go back out in the morning to find it. It was flying great and all of a sudden, probably 1/4 mile away, I lost all control and it went in. I had a similar incident a few weeks back but got control of the plane and didn't have any other problems. I thought the first time it was because I forgot to extend the stubby antenna as it was still folded to the side. Both times, the plane was about the same place at our field. Any ideas what happened?
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Sep 28, 2015, 09:26 PM
Balsa addiction since age 3
ScottSails's Avatar
What is the chance that the antenna (transmitter) has been bent so much that the wire inside is broke/intermittent?

If it was same place at field, are others having issues?

Does it pass a range check? Check where you crashed?

Best wishes,
Scott
Sep 29, 2015, 09:31 AM
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Well, I went and recovered my plane this morning, it wasn't pretty. The wings are good and the engine appears intact but the fuse is pretty bad. I tested the receiver at home out of the plane and it started acting up less than 100 feet away. The receiver began flashing red/green. I then tried a different battery with the same results. I then tried a different receiver the same way and got the same results. Now I'm looking at a new transmitter.

If you were to start over again, what transmitter would you buy? I have 3 fast 7 channel receivers but that won't keep me from trying something else. I probably won't need anything bigger than an 7 or 8 channel. I looked at Tower Hobbies at a Futaba 8JA which uses a different receiver but they're cheaper to buy new receivers down the line.
Sep 29, 2015, 10:16 AM
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DougV's Avatar
If it was me, I would open the back of the radio and look at the antenna connector, make sure is connected to the RF board.

Doug
Sep 29, 2015, 11:46 AM
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richard hanson's Avatar
Based on your evaluations - bundle the tx and rx and send to the repair center.
when a radio (any brand ) suddenly changes results when range testing - you have a hardware issue.
Flying an aerobatic model 1/4 mile away - makes observable issues very chancy- human eyes are only so good -------
Sep 29, 2015, 12:01 PM
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Quote:
Originally Posted by DougV
If it was me, I would open the back of the radio and look at the antenna connector, make sure is connected to the RF board.

Doug
I just took the cover off and everything, that I can tell anyway, is connected. The antenna is connected for sure.
Sep 29, 2015, 12:03 PM
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Quote:
Originally Posted by richard hanson
Based on your evaluations - bundle the tx and rx and send to the repair center.
when a radio (any brand ) suddenly changes results when range testing - you have a hardware issue.
Flying an aerobatic model 1/4 mile away - makes observable issues very chancy- human eyes are only so good -------
I'm just guessing at the distance, it was probably closer. I've flown that way several times coming around for a landing mostly. I'm on the fence on whether to send it back or just get something else.
Sep 29, 2015, 07:01 PM
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I sent the transmitter and 2 receivers to Hobby Services tonight. I'm hoping they find something wrong. I'm 99.9% sure that it wasn't me. I believe the throttle went to idle during fail safe and never recovered also. I had about a half tank of fuel left and the engine was running good during its last flight.


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