Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Electronics Support > Hitec Radios > Hitec Gyro/Servos


Hitec Gyro/Servos Hitec Gyro and Servo Support


Reply
 
Thread Tools Display Modes
Old 12-26-2010, 06:26 AM   #1
colcha
Registered Users
 

Join Date: Aug 2010
Location: Sydney, Australia
Default 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?
colcha is offline        Reply With Quote
Old 07-17-2011, 05:51 AM   #2
Wolfgang
Registered Users
 
Posts: 80
 

Join Date: Apr 2009
Location: PH
Default

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
__________________
Futaba 7C 2.4 FASST
KDS 450D Tarot Sport head and tail
Align TREX 250
Wolfgang is offline        Reply With Quote
Old 07-17-2011, 09:52 PM   #3
minititinflyer
Registered Users
 
Posts: 1,621
 

Join Date: Dec 2007
Location: hollywood fl
Default

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 )
__________________
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!
minititinflyer is offline        Reply With Quote
Old 07-21-2011, 12:11 AM   #4
jdqsGua
Registered Users
 

Join Date: Jul 2010
Location: Guatemala
Default

dude, I think he crashed and saw the problem after the crash, that would be a logical answer, but I can be wrong...
jdqsGua is offline        Reply With Quote
Old 07-21-2011, 01:54 AM   #5
A.T.
Registered Users
 

Join Date: Jul 2008
Location: Auckland NZ
Default

Quote:
Originally Posted by colcha View Post
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?
It may well have been damaged in the crash, especially if the holes in which the pin is located are elongated and gears locked up.
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
A.T. is offline        Reply With Quote
Old 07-29-2011, 07:13 AM   #6
willlig756
Registered Users
 
Posts: 2,443
 
My HF Map location
Join Date: Dec 2010
Location: Atlanta, TX
Default

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.
__________________
HeliFreak
willlig756 is offline        Reply With Quote
Old 02-23-2012, 06:09 AM   #7
ramall79
Registered Users
 

Join Date: Nov 2008
Location: Malta
Default

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
ramall79 is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Electronics Support > Hitec Radios > Hitec Gyro/Servos


Hitec Gyro/Servos Hitec Gyro and Servo Support

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com