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mCP X Brushless Mods Blade Micro CPx Brushless Mods and Conversions


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Old 07-09-2011, 03:07 AM   #1 (permalink)
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Default The hunt for the best outrunner motor

It's now by far that I'm experimenting with various brushless motors on a couple of mCP X.

Personally I prefer to fly with high speed to the main rotor, even at the cost of reducing the flight time to 4 minutes.

I spent much time looking for an AeoRC outrunner motor that had the performance of the Novus CP inrunner motor by which I can fly with rotation speed around 5500 rpm.

The C05M manifests too bog with 9T pinion. The data sheet says it is a 60W motor, but instead is a 30W motor, is lightweight, but has little power.

The ADH50 does not solve anything, it's the same motor, but mounting a 8T pinion, the rotor turns too slow. In addition, the bell is not fixed with the snap ring and bearings are of very poor quality, the axis has too much lateral play.

In these closing days of the forum, I tried two C05XL motors.
They are heavier, but much more powerful than the first two. Unfortunately, their construction is poor, unbalanced and are running with heavy vibrations.
Despite the obvious power, with 9T pinion, the rotor barely reaches 5100 rpm. I believe there is an error in reporting that this motor has 10800KV.
In addition, both motors have failed after a dozen flights.

Yesterday I got the Oversky HP05S outunner motor.
It It weighs 5.4 g and has a diameter of 13 mm. Is a 4A max current motor and develops 12500KV.





Compared to C05XL...






... and C05M




Watching carefully you notice that is built with high standards of workmanship far more than the AeoRC motors.
It 'is perfectly balanced to run without the slightest vibration.

I mounted into the Rakonheli cnc main frame without problems
(due to the small diameter to 13mm is easier to insert in modded plastic frames)




And I completed the work with the fantastic canopy similar to the TDR






With 9T pinion develops 5900 rpm with a throttle value of 84%.

It's really powerful and holds heavy collective punch.
75% of travel pitch is too much for this motor.

In this video I fly with 68% of travel pitch, but actually I fly with 65% with plenty of power

The double-coreless tail mod holds perfectly any abuse at the highest speed without tail wag.

I ordered another one to replace the Novus CP inrunner motor, against which saves about 5 grams

Last edited by liftbag; 07-09-2011 at 08:13 AM..
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Old 07-09-2011, 05:29 AM   #2 (permalink)
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Nice find Paolo and nice write up...so I had to order one too

Got any links for pinions..I'm having problems finding some..they are 0.4mod yes??

Also, did RKH give you any idea when their frames are going to be released for general sale?

Cheers
Ian
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Old 07-09-2011, 06:16 AM   #3 (permalink)
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Originally Posted by Pigs dont fly View Post
Nice find Paolo and nice write up...so I had to order one too

Got any links for pinions..I'm having problems finding some..they are 0.4mod yes??

Also, did RKH give you any idea when their frames are going to be released for general sale?

Cheers
Ian
In Europe we have Mikroantriebe. Beautiful crafted pinion. You need M0.3 module for mCP X.
You can order your pinion here. You have to specify hole(D) 1,5mm, width (T) 3mm and brass MO58 material.

The Rakonheli cnc main frame with tail boom support should be launched on July 18.

Paolo
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Old 07-09-2011, 08:24 AM   #4 (permalink)
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So would you say the performance is greatly improved over the Novus CP BL motor?
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Old 07-09-2011, 08:27 AM   #5 (permalink)
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Thank's, pinion ordered

Looking forwards to the RKH frame
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Old 07-09-2011, 09:29 AM   #6 (permalink)
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Originally Posted by adroc3905 View Post
So would you say the performance is greatly improved over the Novus CP BL motor?
Without a doubt, although I can not tell if the motor is actually more powerful, or whether to make a difference is the weight / power ratio.
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Old 07-09-2011, 10:38 AM   #7 (permalink)
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Without a doubt, although I can not tell if the motor is actually more powerful, or whether to make a difference is the weight / power ratio.
Are you still using stock Lipos? I use the Hyperion 240's and they tend to have a more even power discharge in that they deliver consistently throughout the flight rather than start strong and plummet fast like the stock ones do....IMO...of course.
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Old 07-09-2011, 01:39 PM   #8 (permalink)
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Are you still using stock Lipos? I use the Hyperion 240's and they tend to have a more even power discharge in that they deliver consistently throughout the flight rather than start strong and plummet fast like the stock ones do....IMO...of course.
The stock batteries are languishing somewhere since I converted my two mCP X to brushless. They are absolutely unsuitable for an external esc that absorbs peaks of 4 amps, too much voltage drop, that causes the cut-off prematurely.

To maintain an acceptable flight time I have always used the Hyperion 320 mAh, but with the HP05S motor I am using the Turnigy 300 mAh to reduce weight.
With a 76% flat throttle curve and 63% of travel pitch I fly 4 minutes in which the battery discharges about 220 mAh.
At the end of the fourth minute I can still run a large backward looping without sitting in the motor.

Now, after several flights, I can say that the HP05S is the motor that was looking for, is perfect for the type of flight that I like, stable yet fast together, somewhat like the TDR
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Old 07-09-2011, 04:39 PM   #9 (permalink)
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This is a short flight where the pitch is set to 63% of travel.
It 'always very responsive, even towards the end of the video where you hear that I switch from stunt2 to stunt1.

Sorry for the video a bit dark because of the sunset.

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Old 07-10-2011, 02:38 AM   #10 (permalink)
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What's your FULL brushless set up Paolo (if you don't mind sharing) ??
We know it's a HP05S motor.
ESC ??
Converter ??
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Old 07-10-2011, 02:50 AM   #11 (permalink)
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why are there 2 yellow wires coming out of your steve converter
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Old 07-10-2011, 07:55 AM   #12 (permalink)
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Quote:
Originally Posted by Meebo View Post
What's your FULL brushless set up Paolo (if you don't mind sharing) ??
We know it's a HP05S motor.
ESC ??
Converter ??
If you open the video in youtube and click on show more it says it all. For convenience, I copy / paste

Quote:
Oversky HP05S main motor
Mikroantriebe 9T M0.3 pinion
XP-7A brushless esc, timing middle (2), governor mode (2)
Thesteve converter
Rakonheli CNC main frame (prototype) and rotor head
Microheli swashplate
Xtreme blade grips
Twin coreless tail motor mod (bmcx2 ccw motors)
Turnigy nanotech 300 mAh lipo
Proheli mTDR-CPX canopy
---------------------------------------------
Tx settings

Travel pitch 63%
Stunt1 throttle curve 74% flat
Stunt2 throttle curve 82% flat
Pitch curve 0% - 100% linear
-------------------------------------------
50,4 grams with battery
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Old 07-10-2011, 07:56 AM   #13 (permalink)
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Quote:
Originally Posted by Crashhappy13 View Post
why are there 2 yellow wires coming out of your steve converter
Because it's a dual converter, one for main, one for tail. Actually the one for tail is not used.
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Old 07-10-2011, 05:37 PM   #14 (permalink)
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Thanks for that Paolo.

I'm surprised to see your using the XP-7A, I was expecting something super flash like the TMM 0703-3 or the YGE-4S.
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Old 07-10-2011, 10:03 PM   #15 (permalink)
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Quote:
Originally Posted by Meebo View Post
Thanks for that Paolo.

I'm surprised to see your using the XP-7A, I was expecting something super flash like the TMM 0703-3 or the YGE-4S.
I had used YGE-4BL time ago, but seem to me that there was problems with the converter.
When the Rakon main frame will be available, I'll do some tests with YGE-4BL and HP05S.
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Old 07-11-2011, 06:10 AM   #16 (permalink)
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Quote:
Originally Posted by liftbag View Post
I had used YGE-4BL time ago, but seem to me that there was problems with the converter.
When the Rakon main frame will be available, I'll do some tests with YGE-4BL and HP05S.
Well, I think the YGE-4BL dont match technical specifications of HP05S.

Here are the real features on the packaging (other than those reported by miraclemart)



7 Amps max current, too much for the esc.
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Old 07-11-2011, 09:00 AM   #17 (permalink)
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7A is ok for the XP7A

I have a 1s brushless tail on the way thanks to my friend Dave (roffey on RCG) thanks Dave! I wonder if I had better look at running a larger lipo if I'm going to try this HP05 with it..One ballistic heli comming up, I may even get proper tic tocs now
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Old 07-11-2011, 10:36 AM   #18 (permalink)
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Originally Posted by Pigs dont fly View Post
7A is ok for the XP7A

I have a 1s brushless tail on the way thanks to my friend Dave (roffey on RCG) thanks Dave! I wonder if I had better look at running a larger lipo if I'm going to try this HP05 with it..One ballistic heli comming up, I may even get proper tic tocs now
I am not able to do the tic toc yet , but I can assure you that with the HP05S motor and XP7A esc you'll succeed.

What motor and esc for the brushless tail?
Since using the twin coreless tail mod I'm not more interested to tail brushless convertsion, but if the solution is lighter and less powerful, I might reconsider it...
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Old 07-11-2011, 10:52 AM   #19 (permalink)
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Tail will be a modified Walkera 1s tail esc, and probably an AP02 motor, I'm going to have to wait for HKing to deliver the motor so it will be a few weeks yet...

Time to look for a Spektrum module for my Futaba...the Dx4e offers me no curves to turn the motor power down in idle up.
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Old 07-11-2011, 10:56 AM   #20 (permalink)
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Quote:
Originally Posted by Pigs dont fly View Post
Tail will be a modified Walkera 1s tail esc, and probably an AP02 motor, I'm going to have to wait for HKing to deliver the motor so it will be a few weeks yet...
Thanks

Quote:
Time to look for a Spektrum module for my Futaba...the Dx4e offers me no curves to turn the motor power down in idle up.
Yes, you need it.
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