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Old 10-02-2014, 03:34 PM   #1 (permalink)
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Default What pinion tot use
I am currently upgrading my motor to a xnova 4530 480 xts
i want to fly on 14S what pinion will be better 12T helical or 13T helical

Let me know what you guys think
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Old 10-02-2014, 06:49 PM   #2 (permalink)
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I'd say 12T. You're not too far below the Kv of the 4926SZ motor and you're running 17% more voltage than the typical setup.
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Old 10-02-2014, 07:25 PM   #3 (permalink)
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It depends on the headspeed you want to achieve. For anything lower than 2150, the 12T is perfect. But if you need higher headspeed, you need a 13T for good gov performance.
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Old 10-02-2014, 09:22 PM   #4 (permalink)
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Originally Posted by anmatheextreme View Post
It depends on the headspeed you want to achieve. For anything lower than 2150, the 12T is perfect. But if you need higher headspeed, you need a 13T for good gov performance.
Are you sure you're not talking about a 12S setup? The OP is running 14S.
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Old 10-03-2014, 12:12 AM   #5 (permalink)
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Are you sure you're not talking about a 12S setup? The OP is running 14S.
You are right, I just put the numbers on Mr Mel's calc again and I probably put something wrong the first time. The OP can go over 2200 with the 12T with enough headroom. I apologize for that.
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Old 10-03-2014, 04:18 AM   #6 (permalink)
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Thanks guys it seems 12T is the best option. But is gear stripping a problem on 12T pinion
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Old 10-03-2014, 04:56 AM   #7 (permalink)
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I don't think you will have a problem, the Compass Slant gear is pretty beefy as it is and if you have the correct mesh needed, it should not strip on you.
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Old 10-03-2014, 09:39 AM   #8 (permalink)
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Pinion selection also is a function of the ESC used. For example, I use a larger pinion for Kontronik Jive or YGE than I would HobbyWing, or Castle. YEP would also be in there.

I am using 13t with 500kV to get a 2000 rpm at 65% throttle (82% PWM).
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Old 10-03-2014, 09:40 AM   #9 (permalink)
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Well I use a yge controller
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Old 10-03-2014, 09:46 AM   #10 (permalink)
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I am using 13t with 500kV to get a 2000 rpm at 65% throttle (82% PWM).
You're on 12S though, right?
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Old 10-04-2014, 06:42 PM   #11 (permalink)
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Right....I missed that part.
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