Omei EP Glider Motor What a Mess!  
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All Forums >> RC Airplanes >> ARF or RTF >> NitroModels Support >> Omei EP Glider Motor What a Mess!
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Omei EP Glider Motor What a Mess! - 9/18/2007 5:03:12 PM   
cloudniner


 

Posts: 112
Joined: 1/18/2002
From: Bath, ON, CANADA
Status: offline 		Anyone out there advise of what motor to use in the nose of the Omei Glider. Not familiar with E-motor specs.

The picture shows the front end of the Omei after running up the Monster Power 15 motor to about half throttle and immediately shut down. Not very happy!

Looking at the remains I can't believe how thin the motor mount area is on this aircraft. The aluminum mounting plate is even twisted from the vibration and I suppose torque from the motor.

I would hope that Nitro models would replace this stuff. We will see what happens.



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< Message edited by cloudniner -- 10/18/2007 4:35:42 PM >
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RE: Omei EP Glider Motor Advice - 9/18/2007 6:38:20 PM   
opjose



Posts: 5504
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		I can't find this plane at www.nitroplanes.com, could you post the link?



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Build em'', fly em'', crash em'' and build more.

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RE: Omei EP Glider Motor Advice - 9/18/2007 7:12:30 PM   
cloudniner


 

Posts: 112
Joined: 1/18/2002
From: Bath, ON, CANADA
Status: offline 		Not sure why they have it so hard to find.

Got the Omei the other day and it is a really nice looking ARF for the price. Beautiful fiberglass fuse.

http://www.nitroplanes.com/om20thglepar.html

They call for 540 class motor. Not sure how that relates to brushless as I understand 540 is a brushed motor.

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       Post #: 3

RE: Omei EP Glider Motor Advice - 9/18/2007 7:29:35 PM   
opjose



Posts: 5504
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		Nice...

It's designed for a brushed 540 motor, so you could always use one of those...

I would however consider a brushless motor for more power...

Either of these would give it a good watt/lb ratio... click below...

Monster Power 10
Monster Power 15

Then throw a folding prop at it.

You could also go with a 25 equivalent too, but that will cost more in terms of battery weight.... it would make it fast however when powered.



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Build em'', fly em'', crash em'' and build more.

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RE: Omei EP Glider Motor Advice - 9/19/2007 9:28:30 AM   
cloudniner


 

Posts: 112
Joined: 1/18/2002
From: Bath, ON, CANADA
Status: offline 		opjose

Thanks for the advice. Just ordered the MP 15 and folding prop.

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RE: Omei EP Glider Motor Advice - 10/18/2007 3:48:37 AM   
cloudniner


 

Posts: 112
Joined: 1/18/2002
From: Bath, ON, CANADA
Status: offline 		I am so ticked!

I purchased the Monster Power 15 for the Omei glider alright but what a disaster.

I attached the motor to the glider and installed a brand new balanced Graupner folding prop. Hooked up the batteries, etc. to give it a spin.

I got the throttle about half way when the whole front end of the glider disintegrated. The motor twisted itself right out of the glider.

I removed the mounting plate etc from the airframe and without the prop the motor was run by itself. The vibration level of this motor is totally UNACCEPTABLE!

This will be my last transaction with Nitro Models. The quality control on the 25 Bobcat and the problems with the Monster Power 15 speak volumes about the QC from these guys.

RSN

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RE: Omei EP Glider Motor Advice - 10/18/2007 4:08:03 AM   
opjose



Posts: 5504
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		It sounds like the mounting plate was not that strong, and at the same time the prop selected caused a lot of torque. More than the fuse could withstand.


PM John about this here.

Get a new fuse from him and put in a second wooden plate behind the existing one, then add reinforcing strips of wood epoxied to the fuselage.

Did you try running the motor w/o the prop when you first got it?

I bench test mine to make as per the Astroflight Watt meter instructions w/o anything connected just to make sure that the motors are in spec and I have the ESC timing right ( wrong ESC timing can also do what you've experienced, I had this happen on a non-Nitroplanes electric... ).

The ESC should be set to medium or high with that motor.

Anyway running it w/o the prop is a good way to check for excessive vibration.

It's safe to run it flat out for a few seconds... Astroflight's meter docs, suggest 30, to determine if there is anything amiss with the motor.

Electric motors should run SMOOTHLY out of the box, if not it should be returned, and that may have been the problem with yours leading to the failure of the plane...





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Build em'', fly em'', crash em'' and build more.

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RE: Omei EP Glider Motor Advice - 10/18/2007 5:27:02 AM   
Bozarth


 

Posts: 153
Joined: 4/30/2004
From: Centennial, CO, USA
Status: offline 		I run a PJS 1500 Invert with a 14x8 folding prop and love the way it flies.

Kurt

(in reply to opjose)
       Post #: 8

RE: Omei EP Glider Motor Advice - 10/18/2007 4:57:17 PM   
opjose



Posts: 5504
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		Cloudminer:

Great picture!

It clearly shows that there is no way the mount could have held the motor in place as the surrounding area is too weak.


Someone screwed the pooch...

Please PM John about this...

A new fuse may be in order to fix the problem. Hopefully he'll send you one.


Are the wings broken?


But please check the motor on the bench... just run it attached to the ESC and nothing else.

Check to see if it vibrates at any speed. It should NOT.



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Build em'', fly em'', crash em'' and build more.

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       Post #: 9

RE: Omei EP Glider Motor Advice - 10/18/2007 5:28:33 PM   
cloudniner


 

Posts: 112
Joined: 1/18/2002
From: Bath, ON, CANADA
Status: offline 		Thanks again opjose.

I just wanted to try out the motor before anything else, so the rest of the model is as I received it. I was looking forward to getting this little glider in the air, but since it is mid October with winter right around the corner, I guess it will be next spring now. Bummer!

(in reply to opjose)
       Post #: 10

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