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Miniature Aircraft Whiplash & Furion 6
› The Scorpion -6 'Squeals'
09-04-2009 07:01 PM  8 years agoPost 1
mlucia

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Essex Jct., Vermont

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This seems to be an intermittent problem. It appears to have no affect once spooled up. Occasionally when coming out of throttle hold and when in idle up the motor squeals and acts like it is stalling and will not spool up. It will sit there until the throttle is brought down all the way.

Going into normal mode, letting it sit for a moment sometimes cures it and sometimes even in normal mode it refuses to spool up making the same noise. It may take 2-3 times of this routine before it works and sometimes it does not do it at all and acts fine.

I have checked gear mesh and belt tension; no difference. The -6 has been treated well and oiled every few flights. The motor itself has approx 100 flights on it. It is not the same sound as when the bearings are going/gone it is rather an electric motor 'stalling' type of sound.

Any thoughts?

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09-04-2009 11:03 PM  8 years agoPost 2
jphilli

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Atlanta, Ga.

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Are you sure the torrington in the autohub isn't slipping?

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09-05-2009 07:58 AM  8 years agoPost 3
Clarence Creer

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Dallas, Texas

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What ESC?

You get all kinds of crazy sounds just before they bite the dust. Motor chatter, timing changes, spoolup refusal, etc.

Team Kontronik Team minicopter/PeakAircraft
VTeam EvoPowerBattery

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09-05-2009 02:15 PM  8 years agoPost 4
mlucia

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Essex Jct., Vermont

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Thanks for the responses.
Are you sure the torrington in the autohub isn't slipping?
Nope, not slipping.
What ESC?
Scorpion 60. Think it is going bad? Bummer..only around 100 flights on it as well...

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09-06-2009 02:51 AM  8 years agoPost 5
Warrick

rrApprentice

Perth, Western Australia

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Hey Mark,

Have you actually checked the bearing in the motor lately? As in pull it out and check it's not notchy etc...

Cheers,
Warrick

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09-07-2009 07:57 AM  8 years agoPost 6
naked painter

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Mid glamorgan uk

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Are you running a scorpion esc?

Sometimes I get this or similar and just have to lower the collective back down to start it. I've seen it happen on other 450s running a scorpion.

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09-08-2009 03:16 AM  8 years agoPost 7
mlucia

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Essex Jct., Vermont

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Warrick...

Yes and all seems fine.

Naked painter...

Really? Yes, it is a scorpion 60. If this is common with that esc does anyone know what is 'acting up' when that happens? Strange

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09-08-2009 08:03 AM  8 years agoPost 8
naked painter

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Mid glamorgan uk

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Hi

I'm running a 45amp on my furion. I've had this occur about 4 times, it doesn't seem to have had a negative affect on the performance of the esc.

It seems to occur when I quickly raise the collective. I don't know whether this has someting to do with the soft start set up.

As I've seen it happen on another esc, I'm not worried about it.

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09-08-2009 01:47 PM  8 years agoPost 9
mlucia

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Essex Jct., Vermont

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Yes, it happens occasionally and when I come out of t-hold right into idle up. Good to know and I wont worry about it then. thx for the reply's everyone.

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11-12-2009 01:29 AM  7 years agoPost 10
j54983

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Wisconsin

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This squeal you speak of is "normal" when using the scorpion esc. I have the same problem. Went to the lhs and spoke to an ma rep who all assured me it is because of the soft start on the scorpion esc.

Jim

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