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Old Nov 04, 2008, 07:03 PM
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brushless conversion of walkera 53-1 into an AP coax

I am converting a walkera 53-1 to a brushless coax using sym. blades with 6-8* of pitch for more stabilaty and a higher headspeed. What size/type of brushless motors and esc's should I use? In stock form it is running 2 370 size with 10t pinion's 92t main and a 7.4v 1200mah 10c battery. Also what other components would I need?
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Last edited by HyperHelis; Nov 15, 2008 at 09:42 AM.
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Old Nov 05, 2008, 12:30 PM
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Can anybody help with this?
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Old Nov 05, 2008, 02:27 PM
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This motor: http://www.r2hobbies.com/proddetail....od=rcps81515_2
Or this motor with a 8t pinion: http://www.swanghobby.com/product.ph...4&cat=5&page=1
And this ESC: http://www.r2hobbies.com/proddetail....d=rcps81706_10
Or this much better ESC: http://www.swanghobby.com/product.ph...7&cat=8&page=1

Motor shaft is 2.3mm, you'll need to source some pinions that match.

You'll need a RX, Vtail mixer and a gyro, I recommend the Imax G192: http://www.swanghobby.com/product.ph...8&cat=0&page=1

Read this thread: http://www.rcgroups.com/forums/showthread.php?t=862602

Good luck and keep us posted

Sebastian.
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Old Nov 05, 2008, 02:46 PM
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Quote:
Originally Posted by bas10an
This motor: http://www.r2hobbies.com/proddetail....od=rcps81515_2
Or this motor with a 8t pinion: http://www.swanghobby.com/product.ph...4&cat=5&page=1
And this ESC: http://www.r2hobbies.com/proddetail....d=rcps81706_10
Or this much better ESC: http://www.swanghobby.com/product.ph...7&cat=8&page=1

Motor shaft is 2.3mm, you'll need to source some pinions that match.

You'll need a RX, Vtail mixer and a gyro, I recommend the Imax G192: http://www.swanghobby.com/product.ph...8&cat=0&page=1

Read this thread: http://www.rcgroups.com/forums/showthread.php?t=862602

Good luck and keep us posted

Sebastian.
I am curiously wondering why I would need a v-tail mixer even though my JR tx will do it?! I have also read the lama post and understand it, my problem is that my stock motors are much larger than the lama stock motors. I just don't want to over do it. Another question is, will a hhgyro be an overkill also?
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Old Nov 12, 2008, 11:09 PM
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I and others working with me plan to convert this heli to brushless as well.

I have only one question and that has to do with pinions.
Can anyone help out with expertise/experience in finding matching pinions?
Is is simply matching to motors shafts.
Because i have a 9t and 15t pinion both fit the same shaft but the 9t does not fit the main gear the 15t. Now this is for my GAUI but so its a different story but I am always confused as to how to match things up.

As fare as motors are concerned I am thinking of using the Z power motors

Or the stock GAUI 200 motor

The other motors that were recommended while great motors and more than adequate I think are almost overkill. However these motors specifically the GAUI stock maybe not able to handle enough amps though with the right pinion all will be good but headspeed will suffer.

I was able to spin the Walkera blades on my GUAI heli with these motors. I was not able to go full throttle without overloading the motors however I was able to get a ton of power none the less.
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Last edited by Tuner; Nov 12, 2008 at 11:24 PM.
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Old Nov 15, 2008, 09:50 AM
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This is a mockup that i'm working on and getting one step closer to the look that i'm wanting. The final base will be made from black styrene.
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Old Nov 18, 2008, 02:59 PM
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I have gotten a little bit more done with the styrene. I still need to add two more supports to the rear fins, battery tray and get the pitch spacers cut for my blades. I have the stock blades installed just for reference. I'm using the stock 10t pinion for now.

motors

esc's
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Old Nov 18, 2008, 03:17 PM
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Overkill motors, too high KV and too heavy, your setup will not be very efficient.
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Old Nov 18, 2008, 03:20 PM
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Quote:
Originally Posted by bas10an
Overkill motors, too high KV and too heavy, your setup will not be very efficient.
They will when I put 225mm symetrical blades on it and run a headspeed of 2300rpm's. Also there is only a 1oz difference between the stock motors and the brushless motors.
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Old Nov 18, 2008, 03:48 PM
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Quote:
Originally Posted by evlfkrjohn
They will when I put 225mm symetrical blades on it and run a headspeed of 2300rpm's. Also there is only a 1oz difference between the stock motors and the brushless motors.
Yes, 1oz*2 motors+2*18gr. ESC's=Too much weight, not to mention they're inrunners, in as in INeffecient

When building Helis every gram counts, take it from one who has 35+ helis and counting

The setup I suggested is light, cheap and effecient:
2*36gr. motors+2*9gr ESC's+2*2gr. pinions=94gr.

Don't get me wrong, it will fly, no doubt, and I'm looking forward to seeing the video when it does.
I really like the frame, keep up the good work and keep us posted.

Sebastian
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Old Nov 18, 2008, 03:52 PM
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BTW: You should consider the double swashplate mod for better outdoor stability, it would look cool too.
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Old Nov 18, 2008, 04:35 PM
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Quote:
Originally Posted by bas10an
Yes, 1oz*2 motors+2*18gr. ESC's=Too much weight, not to mention they're inrunners, in as in INeffecient

When building Helis every gram counts, take it from one who has 35+ helis and counting

The setup I suggested is light, cheap and effecient:
2*36gr. motors+2*9gr ESC's+2*2gr. pinions=94gr.

Don't get me wrong, it will fly, no doubt, and I'm looking forward to seeing the video when it does.
I really like the frame, keep up the good work and keep us posted.

Sebastian
I understand your weight concern along with your suggested setup. It would work but not as well as what i'm needing. And as far as using outrunners I am trying to use the original steel frame that is underneath the styrene so 370s inrunners are perfect. I too own and have owned multiple helis, 63 to be exact(15 years gets you alot of toys) i'm just looking for a different approach to this project. If the motors dont work out then i'll try again, but I can tell you this much I am going to need no less than 20amp esc's.
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Old Nov 18, 2008, 04:36 PM
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Quote:
Originally Posted by bas10an
BTW: You should consider the double swashplate mod for better outdoor stability, it would look cool too.
Yes, I am going to use a dual swash but it will be a little different than what has been done.
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Old Nov 18, 2008, 05:44 PM
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Quote:
Originally Posted by evlfkrjohn
Yes, I am going to use a dual swash but it will be a little different than what has been done.
look forward to your 'different' dual swash design.
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Old Nov 18, 2008, 06:30 PM
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Quote:
Originally Posted by dendog220
look forward to your 'different' dual swash design.
So...do...I
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