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HelicopterMain Discussion › DS8231 servo failure
10-23-2004 01:12 AM  13 years agoPost 1
Glenn

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Perth, Western​Australia

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Hi All
Yesterday I lost my Venture 60 from about 200 feet with no chance of recovery, I was in fast forward flight when the tail went down, I tried to swing the tail around to pendulim it in but soon realised that it was nothing more than a house brick. I cut the engine at about 100 feet but it was over and hit hard. The worst part my 601 was destroyed taking most of the impact. All those nice K&S parts and V Blades.
It can be repaired but it really took the wind out of my sails when I knew what had failed even before it had hit the ground.
My question is , has anyone experienced a failure with one of those 8231 servos installed on a ccpm setup?

RCrotortech Zealous Longranger, Hirobo JetRanger, Hirobo Bell 47,JR Venture 90

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10-23-2004 01:40 AM  13 years agoPost 2
daren

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Hampshire Sponsored​by Quick UK

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A flying buddy with a vigor equipped with 8231s has on 3 occasions ditched it due to either a servo quitting or the gears failing,

Lucky for him he managed to get away lightly on all occasions

Daren
Using the ground to reverse engineer

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10-23-2004 03:40 AM  13 years agoPost 3
alfred

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Australia, New South​Wales, Mid North​Coast

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Well..that's just great Glenn
My older X-Cell is full of DS 8231's

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10-23-2004 05:20 AM  13 years agoPost 4
AGRAV8

rrProfessor

Mosquito​Coast......Houston​Texas

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8231's

I have been told by a JR factory/service tech that the 8231's are NOT suitable for gasser applications....we had a LONG discussion about why....and I agree with him based on information I had and the failure that I witnessed in a gasser. This in a xcell with the "old style" setup.......and it was the aileron servo.

With that said, my GLOW P-max has them....and I am not overly concerned. My servo of CHOICE for CCPM is the JR 8311. Those I use on CCPM gassers.....and so far have been more than up to the task.

Sorry about your loss......

James

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10-23-2004 08:37 AM  13 years agoPost 5
Glenn

rrNovice

Perth, Western​Australia

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Stripped gears

I finally started pulling her down and found a stripped gear to my supprise, I really would have thought it would have been an electronic component. I don't understand why it would have let go in forward flight as the load on the servo would have been minimal, although it may have had a fracture in that gear ?? Not supprissing though, I really give it **** once airbourne. Does anyone know if they make metal gear sets for the 8231 as I really don't want this to happen again and or does the 8311have metal gears?

RCrotortech Zealous Longranger, Hirobo JetRanger, Hirobo Bell 47,JR Venture 90

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10-23-2004 02:36 PM  13 years agoPost 6
DS 8717

rrProfessor

Here wishing i was​somewhere else

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You can use 2 of the metal gears from the 8700 in the 8231, and the metal output gear if you like. it will also speed up the servo at the same time.
I saw this tip from Curtis. I built one to use as a T/R servo.
You only reuse the plastic gear that messes with the gear on the servo motor,the gear on the servo motor has on the 8700 has one more tooth so the gear it meshes with has less teeth than the 8231,which also makes the 8700 faster. Curtis says using the 8700 gears will make the 8231 about .1 sec. I had some gears from an old 8700 that i used.
obviously you will need to do all 3 servo's. DOUG

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HelicopterMain Discussion › DS8231 servo failure
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