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Author Topic: Axi question..  (Read 3595 times)

Offline Joe Yau

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Axi question..
« on: March 30, 2017, 06:57:43 PM »
Just wondering if anyone might know the new Axi 2826-12 Ver:2  5mm shaft could be shifted other way around like the Cobra motors for rear mount?

Thanks in advance
« Last Edit: March 30, 2017, 07:23:42 PM by Joe Yau »

Offline pmackenzie

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Re: Axi question..
« Reply #1 on: March 30, 2017, 07:27:41 PM »
With AXI you don't need to turn the shaft around, they sell a prop adapter that instead bolts to the "front" of the motor.
(AXI calls it the rear, all a matter of perspective :) )

https://www.modelmotors.cz/product/radial-mount-set-for-axi-v2/

What you might want to do is cut off the part of the shaft that will be sticking out of what is now the rear end, so it does not take up space in the battery bay.
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Offline Joe Yau

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Re: Axi question..
« Reply #2 on: March 31, 2017, 01:19:13 AM »
Hi Pat,  Thanks for the infos.  H^^ The Ver:2 actually comes with the rear mount adapter, but it’s 6mm.   I prefer to use the 5mm prop adapter with 1/4-28 as that works with the spinner adapter I have.

Offline Igor Burger

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Re: Axi question..
« Reply #3 on: March 31, 2017, 01:25:00 AM »
With AXI you don't need to turn the shaft around, they sell a prop adapter that instead bolts to the "front" of the motor.
(AXI calls it the rear, all a matter of perspective :) )

https://www.modelmotors.cz/product/radial-mount-set-for-axi-v2/



Yes that is the way, However that adapter was necessary to buy separately for old AXI motors, new V2 are sold WITH them.

Offline Igor Burger

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Re: Axi question..
« Reply #4 on: March 31, 2017, 01:26:40 AM »
Just wondering if anyone might know the new Axi 2826-12 Ver:2  5mm shaft could be shifted other way around like the Cobra motors for rear mount?

Thanks in advance

No Yoe, it cannot, rotors are ballanced with installed and fixed shaft, if you dismount them, proper balancing is lost. The other problem, is, that if you dismount it, you do not have chance to adjust proper axial free play (should be aproximately 0,1mm). Shafts are shimmed and you probably do not have shims and tools for measuring, so I recommend not to open them. They are precise, openning will push them to "cheap" motors quality.

Simply use shaft extender as Pat wrote.

Offline Igor Burger

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Re: Axi question..
« Reply #5 on: March 31, 2017, 01:30:07 AM »
Hi Pat,  Thanks for the infos.  H^^ The Ver:2 actually comes with the rear mount adapter, but it’s 6mm.   I prefer to use the 5mm prop adapter with 1/4-28 as that works with the spinner adapter I have.

I see I answereed late ... but in that case, you can use some extender and longer screws (if the problem is distance).

Or you can put some shimming between the motor and firewall. I put there heat sink.

Offline Joe Yau

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Re: Axi question..
« Reply #6 on: March 31, 2017, 10:44:41 AM »
No Yoe, it cannot, rotors are ballanced with installed and fixed shaft, if you dismount them, proper balancing is lost. The other problem, is, that if you dismount it, you do not have chance to adjust proper axial free play (should be aproximately 0,1mm). Shafts are shimmed and you probably do not have shims and tools for measuring, so I recommend not to open them. They are precise, openning will push them to "cheap" motors quality.

Simply use shaft extender as Pat wrote.

Thanks Igor.  well, that's enough to convinced me not to open it up..  and use the rear case mount prop adapter.  I guess I could make up a 6mm to 1/4-28 for spinner adapter.   :)

Offline Igor Burger

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Re: Axi question..
« Reply #7 on: March 31, 2017, 04:25:45 PM »
May be we can find solution if you can show what is exactly the problem, I thought too short motor, but now I see the thread is wrong.

I have for example such conversion nuts M6/M3 like you see on picture for our spinners ... if you can somehow combine, I can send you one.

Offline Joe Yau

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Re: Axi question..
« Reply #8 on: April 01, 2017, 11:37:49 AM »
May be we can find solution if you can show what is exactly the problem, I thought too short motor, but now I see the thread is wrong.

I have for example such conversion nuts M6/M3 like you see on picture for our spinners ... if you can somehow combine, I can send you one.

O.k.  Just have a closer look at it..  The motor length is short by about 8mm, but I could put a spacer/ heat sink etc. in there. so its not too hard to figure out.   The conversion nut is exactly what I need.. If it could be drilled out and retapped  from M3 to 1/4"-28 it should work.   


Offline pmackenzie

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Re: Axi question..
« Reply #9 on: April 01, 2017, 12:13:46 PM »
This is what you need  :)
1" long, M6 on one end, 1/4-28 on the other.
Each thread goes about 1/2 way meeting in the middle.

I have more than one, so shoot me a PM if you are interested.

Pat MacKenzie
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Offline Joe Yau

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Re: Axi question..
« Reply #10 on: April 02, 2017, 09:17:59 AM »
This is what you need  :)
1" long, M6 on one end, 1/4-28 on the other.
Each thread goes about 1/2 way meeting in the middle.

I have more than one, so shoot me a PM if you are interested.

Pat MacKenzie

That's it!  I would like one..  #^ PM sent.  

Offline Bill Mohrbacher

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Re: Axi question..
« Reply #11 on: April 23, 2017, 04:52:33 PM »
No Yoe, it cannot, rotors are ballanced with installed and fixed shaft, if you dismount them, proper balancing is lost. The other problem, is, that if you dismount it, you do not have chance to adjust proper axial free play (should be aproximately 0,1mm). Shafts are shimmed and you probably do not have shims and tools for measuring, so I recommend not to open them. They are precise, openning will push them to "cheap" motors quality.

Simply use shaft extender as Pat wrote.
What is special about the AXI 2826 F2B motor in your Pictures?  Is it available in the USA?

Offline Alan Resinger

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Re: Axi question..
« Reply #12 on: April 23, 2017, 10:09:01 PM »
The AXI 2826 F2B motor is available from Igor exclusively.   Due to its Kv rating, it requires a 6S battery.  There is a good chance you will run out of power in the later maneuvers if you use less than a 6S.  I speak from experience, believe me.

Offline Igor Burger

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Re: Axi question..
« Reply #13 on: April 24, 2017, 01:28:07 AM »
There is a good chance you will run out of power in the later maneuvers if you use less than a 6S.  I speak from experience, believe me.

Yes, exactly, that motor is perfectly tuned and well tested combo with my active timer, our 5" pitch props and 6s batteries.

Active timer asks for strong power boost in vertical climbs in four leaf (when battery goes almost flat) and if battery does not have enough voltage, it simply needs to cover that power by high current. 5s Battery simply cannot cover such boost and goes to knees. Constant RPM setup will work well, but active timer simply needs little bit more voltage head room, that is reason why we fly 6s batteries.


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