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Old Jan 28, 2013, 07:29 PM
I don't want to "Switch Now"
pmackenzie's Avatar
Toronto (Don Mills), Canada
Joined Dec 2002
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Quote:
Originally Posted by psguardian View Post
Headspeed aside (can buy motor for desired HS), what pinion has the best mesh with the main gear?

~psguardian
Not exactly sure what you are asking, but in general you want more teeth to get a better mesh.

But given the size of the motor the typical pinions are bordering on too small to properly mesh. 15 tooth is the generally accepted minimum number of teeth for any pinion,
but usually a 450 will use 11 or 12 to properly match the torque of the motor to the load.

Changing the Kv will not change the torque capability of the motor, only the current that it will take to produce that torque.
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Old Jan 28, 2013, 07:43 PM
If I build it, it will fly
United States, NY, East Rochester
Joined Jan 2012
710 Posts
The teeth on a 15T pinion look soo much smaller than those of a 10T/11T pinion, it didn't seem like the higher pinions are a better fit at all.

I'm trying to find the pinion that best fills the space between teeth on the main gear. I know the motor mount has slide holes for fine adjustment, I just wanted to see which commonly avail pinion fits best.

~psguardian
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Old Jan 28, 2013, 09:27 PM
I don't want to "Switch Now"
pmackenzie's Avatar
Toronto (Don Mills), Canada
Joined Dec 2002
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The teeth should be the same height from root to tip.

Are your sure your 15 tooth is the correct pitch? Should be 0.5 module

Here is a set of pinions from 11 to 13 for example, and the teeth are all pretty much the same

http://helidirect.com/rhino-gear-ste...0g5-p-6754.hdx
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Old Jan 29, 2013, 04:05 AM
Looptastic!
sp00fman's Avatar
Enschede, Netherlands
Joined Nov 2009
2,292 Posts
you can get away with a bigger pinion if you run a governor on your ESC. I feel the 11T pinions wear out quickly. I got a set of steel 12T pinions and have not looked back since. I might get a 13T soon for a little more overhead on my governor power range.


linky
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Old Jan 29, 2013, 05:38 AM
as much as I can
beenflying's Avatar
NZ
Joined Jan 2010
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Align playing catch up to Tarot. Thrust bearing 450 tail:

http://www.infinity-hobby.com/main/n...ewsdesk_id=961
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Old Jan 29, 2013, 08:18 AM
just gotta mess with it!
2Doggs's Avatar
North West Louisiana
Joined Nov 2009
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What next? A split-lock Align DFC head?
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Old Jan 29, 2013, 09:14 AM
banging head on wall
skyeblu's Avatar
Joined Feb 2010
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Quote:
Originally Posted by psguardian View Post
Headspeed aside (can buy motor for desired HS), what pinion has the best mesh with the main gear?

~psguardian
Most all the pinions available for the 450 size motors all have the same pitch, the same number of teeth per inch? be it a 10 or 14 tooth if that is in your question. I have heard the slant gears mesh better and run smoother haven't treid them yet but have a set coming to try.
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Old Jan 29, 2013, 01:23 PM
If I build it, it will fly
United States, NY, East Rochester
Joined Jan 2012
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Quote:
Originally Posted by skyeblu View Post
Most all the pinions available for the 450 size motors all have the same pitch, the same number of teeth per inch? be it a 10 or 14 tooth if that is in your question. I have heard the slant gears mesh better and run smoother haven't treid them yet but have a set coming to try.
Yes that was my question. Thank you for rewording it properly LoL. I must have gotten a 15t with a different pitch, the teeth were shorter than my 12/13t & it fit the shaft but had horrible mesh issues. The main gear teeth filled the pinion gaps, but the pinion teeth couldn't fill the main gear gaps.

So with that strait, my next question is: To obtain steady headspeed is it better to go higher kv + lower pinion or lower kv with higher pinion?

My own thought is that higher pinion will bog a motor down more on heavy pitch loads. Am I right?

~psguardian
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Old Jan 29, 2013, 01:57 PM
banging head on wall
skyeblu's Avatar
Joined Feb 2010
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Sounds like that pinion was machined badly. With the head speed it more depends on your helicopter setup, motor, and flying style. You can achieve the same head speed with different kv motors, If you are bogging going down one tooth is where I would start. the smaller the pinion the more torque and less top end speed. think of it as shifting down a gear if your car bogs it's easier to start off in first than second gear.
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Old Jan 29, 2013, 02:17 PM
If I build it, it will fly
United States, NY, East Rochester
Joined Jan 2012
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That sounds right. I have a turnigy 2836 3700kv, I want to set my next 450 up for normal flight & MAYBE light aerobatics.

~psguardian
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Old Jan 29, 2013, 02:37 PM
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Atomic Skull's Avatar
Joined Dec 2011
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Quote:
Originally Posted by beenflying View Post
Align playing catch up to Tarot. Trust bearing 450 tail:

http://www.infinity-hobby.com/main/n...ewsdesk_id=961
Oh wow they literally cloned Tarot lol.
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Old Jan 29, 2013, 02:57 PM
If I build it, it will fly
United States, NY, East Rochester
Joined Jan 2012
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I didn't even know they made a 20t pinion atomic skull, thanks LoL.

~psguardian
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Old Jan 29, 2013, 03:01 PM
If I build it, it will fly
United States, NY, East Rochester
Joined Jan 2012
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Unfortunately a 20t on my motor would cause a good solid meltdown @ over 125amp draw LoL.

~psguardian
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Old Jan 30, 2013, 05:29 PM
just gotta mess with it!
2Doggs's Avatar
North West Louisiana
Joined Nov 2009
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I think if you need to run a 20t pinion on a 450 you're using the wrong battery pack!
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Old Jan 31, 2013, 09:25 PM
AMA# 548800
jombo's Avatar
United States, CT, Trumbull
Joined Dec 2007
5,151 Posts
Has anyone else noticed that with a higher headspeed these things are really stable

I went from a 4400kv motor to a 3800kv and what a difference . I am buying more of the 4400kv motors
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