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AlignRC Scorpion Power
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Senior Heliman

San Antonio Tx, USA

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Does anyone know where I can get a 6mm pinion gear 9-10 tooth. Why do they sell motors with a 6mm shaft if you can't buy the 6mm gears?

07-26-2016 08:17 PM
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DemetriusUSN

Veteran

Virginia Beach, Va USA

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Just Google search what you need. It will help if you added what main gear it's going to drive so we will know if it's mod 0.7...1.0 and so on,then is it straight, slant or herringbone?

Minicopter Diabolo 700, Compass 7hv, Goblin 700 triblade, Compass 6hvu, Logo 600se

07-26-2016 08:32 PM
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Richardmid1

rrProfessor

Leeds, England

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You are not going to get a 9 or 10T 6mm pinion, there simply isn't enough material.

Tell us what you are trying to achieve along with which heli and motor? There are other ways around what you are trying to achieve.

60% of the time, it works every time!

07-27-2016 01:52 PM
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Dr.Ben

rrMaster

Richmond, VA, USA

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Oh yes you can get a 10t 6mm id pinion. Hirobo makes it a mod 1 one. I also have one from Revco.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

08-01-2016 02:36 AM
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Richardmid1

rrProfessor

Leeds, England

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You are right, Scorpion also make a 10t one. No 9t though. I personally wouldn't use one so small for 3d though due to the increased chance of main gear stripping. It's easier on the main gear to run a lower kv motor or lower voltage pack with a larger pinion.

60% of the time, it works every time!

08-01-2016 07:10 AM
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Senior Heliman

San Antonio Tx, USA

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I purchased a Century Swift 620 Carbon se. Couldn't resist the price; my first big electric. Not looking for insane power, probably will put in a Century fuse as I bought three for less than $100 each.
The equipment I have is follows:

- Turnigy/4030 1100kv motor 6mm shaft ... max current 110amps
- Turnigy SK3 Helidrive T600 Competition Series motor 6mm shaft ... 520kv
Phoenix 130 edge ESC
- Align servos: DS615 for cyclic and DS-655 for tail
- Align 780 gyro
- 6s lipo 5000mah
- Pinion gear.......?

08-05-2016 11:27 PM
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JayL

Veteran

Leesburg GA

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Do you know how many teeth are on the main gear. Once you know this you can use the castle link to help you determine the head speed you want. On my e5 stretch I running around 2000 on the head for hard 3d and 1750 for the lighter 3d which where I believe you want to be.

08-06-2016 12:34 AM
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Senior Heliman

San Antonio Tx, USA

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I believe its 96 teeth on main gear.

08-06-2016 03:03 AM
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Richardmid1

rrProfessor

Leeds, England

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OK so you have 2 motors to choose from? The 1100kv is meant for upto 6s lipo and the 520kv is meant for upto 12s lipo.

As kv means rpm/volt and you know the lipo's nominal voltage (22.2v for 6s) you can work out the motor rpm. Then you just need the gear ratio which is the main gear tooth count (96t) divided by the pinion tooth count.

For a 600mm blade heli flying mild sport and scale flight you want around 1700 rpm.

This is going to be hard to achieve with the 1100kv motor on 6s with your gearing so I would suggest either running the 520kv on 6s with a 15t pinion or the 1100kv motor on a 5s lipo with a 10t pinion or 2x 4s packs in parallel on a 12t pinion. OOORR the 520kv motor on 10s with 10t pinion... and breath!

60% of the time, it works every time!

08-06-2016 07:39 AM
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