450 V2 Shudders - Bad ESC?  
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All Forums >> RC Helicopters >> Electric RC Helis >> T-Rex heli >> 450 V2 Shudders - Bad ESC?
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450 V2 Shudders - Bad ESC? - 7/10/2007 3:48:29 AM   
Desmohead


 

Posts: 24
Joined: 5/3/2007
From: North Granby, CT, USA
Status: offline 		Anyone,

Been doing a bit of flying with my v2 (1st T-Rex). I've got a little over 50 flights on it and have noticed an issue after tweaking throttle curves.
My normal mode is set at 0, INH, 85, INH, 95 and my IDle up 1 97, INH, 87, INH 97. When I fly in Idle up the heli will shudder at just above hover. The motor seems to be between thottle steps if that makes sense. If I feed in a little more throttle/pitch the rpm comes up and the shuddering goes away. If I reduce the throttle/pitch I go through this same shuddering zone. I'm using the stock v2 BLX 35. No crashes, no other problems.. Is this a common problem with Align ESC's??


Thanks!!

-Eric




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-Desmohead
       Post #: 1

RE: 450 V2 Shudders - Bad ESC? - 7/10/2007 5:41:37 AM   
HeliSmith



Posts: 1522
Joined: 1/25/2007
From: Canyon Country, CA, USA
Status: offline 		No it's not common. If you are running in governor mode you are pushing the ESC too hard. Finless has a video for setting up the Align ESC I believe but here is a quick and dirty run down.

If you are running in governor mode and you can't acheive the head speed you want in 75% or LESS then you are not geared right. You need a bigger pinion on your motor. I was running 75% flat in normal mode and 80% in idle up with my Align ESC, 430XL and a 12tooth pinion on wood blades.

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http://www.helismith.com

(in reply to Desmohead)
       Post #: 2

RE: 450 V2 Shudders - Bad ESC? - 7/11/2007 2:36:14 AM   
Desmohead


 

Posts: 24
Joined: 5/3/2007
From: North Granby, CT, USA
Status: offline 		Thanks for the reply! I'm using the default settings on the ESC. No governor mode and I'm running 85% at 0 pitch in normal and 87% in idle up. I just ran a test for laughs where I removed the main blades and spooled it up on the bench (landing gear clamped to the bench). No shuddering in normal but a VERY pronounced shudder from the motor just past zero pitch in Idle Up. In normal if I bump the throttle curve from 0%-INH-85%-INH-90% to 0%-INH-85%-INH-100% I get the same shuddering past 0 pitch (though not exactly in the same spot as when I'm in Idle Up). Strange.. It feels like I'm between "steps" in the throttle if that makes sense.


-eric

-DesmoHead


_____________________________

-Desmohead

(in reply to HeliSmith)
       Post #: 3

RE: 450 V2 Shudders - Bad ESC? - 7/11/2007 2:37:30 AM   
Desmohead


 

Posts: 24
Joined: 5/3/2007
From: North Granby, CT, USA
Status: offline 		Sorry, one other thing.. I'm running the 430XL with a 13 tooth pinion on the stock 325 pro woods

-DesmoHead


_____________________________

-Desmohead

(in reply to Desmohead)
       Post #: 4

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All Forums >> RC Helicopters >> Electric RC Helis >> T-Rex heli >> 450 V2 Shudders - Bad ESC?
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