BVM 2x2meter edge540 CG???  
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> BVM 2x2meter edge540 CG???
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BVM 2x2meter edge540 CG??? - 7/4/2007 4:24:02 PM   
Zman39



Posts: 467
Joined: 1/27/2005
From: Central, FL, USA
Status: offline 		I was hoping someone could tell me where the BVM 2x2 edge 540 is suppose to balance out at? Having a hard time finding the right balance.



Thanks

Z
       Post #: 1

RE: BVM 2x2meter edge540 CG??? - 8/14/2007 7:25:52 AM   
HiDesertFun


 

Posts: 6
Joined: 9/29/2005
From: Lancaster, CA, USA
Status: offline 		CG is supposed to be at the center of the wing tube at the tip of the wing. I just flew my 2X2 this past Sun. It would pitch up slightly when I reduced the throttle so I am going to move the CG to the front of the wing tube and try it there. Using DA 50 with Pitts muf.

(in reply to Zman39)
       Post #: 2

RE: BVM 2x2meter edge540 CG??? - 8/14/2007 3:03:13 PM   
Flyjets



Posts: 1223
Joined: 8/19/2002
From: Bradenton, FL, USA
Status: offline 		HiDesertFun

If she is Pitching up on Throttle reduction it doesn't mean your CG is in the wrong location.

Sounds to me like your motor has to much down Thrust in her hence when you power back the thrust is reduced and the Model pitches up.

Typically 1/2 a degree down is all thats needed I would use washers and shim the bottom Motor supports out a bit.

One Last item I have seen certain Props also cause the effect your complaining about. Before you Shim the motor perhaps try a different Prop Brand.

Best Of Luck
Ian

< Message edited by Flyjets -- 8/14/2007 3:04:10 PM >

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(in reply to HiDesertFun)
       Post #: 3

RE: BVM 2x2meter edge540 CG??? - 8/14/2007 9:38:57 PM   
jaycey


 

Posts: 136
Joined: 5/28/2005
From: London, UNITED KINGDOM
Status: offline 		This is the x treme composite edge also suplied by graupner?

See it here with manual that includes the CofG and throw recomendations.

https://shop.graupner.de/webuerp/servlet/AI?ARTN=9386

(in reply to Flyjets)
       Post #: 4

RE: BVM 2x2meter edge540 CG??? - 8/15/2007 11:57:18 AM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		I agree. CG is not the issue but engine down thrust is. Too much down thrust.

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If you can''t fix it with a hammer, you have an electrical problem.

(in reply to jaycey)
       Post #: 5

RE: BVM 2x2meter edge540 CG??? - 8/20/2007 4:55:57 AM   
HiDesertFun


 

Posts: 6
Joined: 9/29/2005
From: Lancaster, CA, USA
Status: offline 		I had also heard that. I will shim for a little up thrust.

Thanks for the help.
Tim

(in reply to Flyjets)
       Post #: 6

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