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12-26-2010, 05:26 AM | #1 (permalink) |
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Join Date: Aug 2010
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Crash caused by 65MG
I was flying my T-rex 450 Sport last week on the first flight of the day. As I it was flying along in a straight line, it started to roll to its starboard. Despite my efforts to counter this with opposite cyclic, the heli plummeted to the ground.
When I checked the heli, I noticed that the 65MG which controls the swashplate on the starboard side was physically jammed. I then connected and disconnected the battery a couple of times and after a while the 65MG started working again. At this stage, the most likely cause of the crash is the 65MG. Shall I junk it or this likely to be a one off thing? Is there a way to fix the problem? |
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07-17-2011, 04:51 AM | #2 (permalink) |
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Join Date: Apr 2009
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Same thing happened to me except my bird was about a foot off the ground when the servo went kaput.
Junked it and got a replacement. Am now thinking of getting a replacement motor for the 65 mg and keep it as a spare
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Futaba 7C 2.4 FASST KDS 450D Tarot Sport head and tail Align TREX 250
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07-17-2011, 08:52 PM | #3 (permalink) |
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Join Date: Dec 2007
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i have the standard 65's get new ones. but one question for you if you saw that was gaveing problems y did you fly it?(not trying to be smart or mean )
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blade msr!, blade mcpx! ,blade 130x!, trex 250!, ,mini titan e325 v2! ,gaui hurricane 425e! ,trex 600 esp!, trex 700e! ,Hitec Aurora 9!, spektrum dx6i! ikon! quark! !AMA# 1021263!
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07-20-2011, 11:11 PM | #4 (permalink) |
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Join Date: Jul 2010
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dude, I think he crashed and saw the problem after the crash, that would be a logical answer, but I can be wrong...
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07-21-2011, 12:54 AM | #5 (permalink) | |
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Join Date: Jul 2008
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Quote:
How old was the MG servo and how often was it serviced?? Metal gears, whilst stronger, do wear out much faster than any other type, refer Servo - FAQ : Metal Gear Servos - DIY Repair & Extend MG Servo Gear Life Servo - FAQ : Metal Gear Servos - Why MG Servo have a Plastic Primary 1st Gear Servo - Do not turn by hand Alan T. Alan's Hobby, Model & RC FAQ Web Links |
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07-29-2011, 06:13 AM | #6 (permalink) |
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I missed a bad gear after a crash and the servo locked up in flight and crashed again. Nearly a total loss twice in a row. First one was dumb thumbs second one was dumb inspector. I've stripped several sets of the mg gears and hb gears.
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Gerald Williams Goblin Black Thunder, Goblin 500, Gaui X7, X5, NX4, X3 |
02-23-2012, 05:09 AM | #7 (permalink) |
Registered Users
Join Date: Nov 2008
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Same happened to me last week, i was flying the Trex 450, some stall turns and very basic loops, after 5 batteries one of the Cyclic Servo jammed and stopped working causing a crash. I was1 meter high but was in Idle up and it did not give me the chance to turn on the Thottle Hold.
This already happened to me twice in a month. I think something is definitely wrong with these servos. Thx Ramall |
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