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jackbraddogs · 02-19-2021, 05:16 AM

Hi, Nearing the end of my Chinook build and have hit a snag.
I am using the scorpion HK2520 motor and an 11t pinion
But the motor has a 3.5mm diam shaft and the pinion is 3.12mm diam hole.
Where can I get one in the UK?
Philip

co_rotorhead · 02-19-2021, 07:11 PM

I'm using the same motor but went with a 12T pinion. That gives me 1800 RPM at 90% ESC capacity running on a 4S battery. An 11T pinion on 4S would put me at almost 100%, which is too high, in my opinion.

jackbraddogs · 02-20-2021, 03:54 AM

Hi, That’s very interesting!
I have been following Joe’s instruction and he uses 11t with 4s!
I have got one from Midland Helicopter VIA eBay as they didn’t have any in their store.
I will order a 12t one as well just for variety
Thanks for your input

jackbraddogs · 02-20-2021, 10:22 AM

Well, here I have the usual problem! -I have an 11t pinion that would fit the chinook main gear, but won’t fit the motor recommended AND a 11t pinion that will fit the motor but not fit the main gear!
I suppose I could drill out the smaller hole, but I would rather just buy one.
Please can anyone help?

jackbraddogs · 02-23-2021, 04:42 AM

Finally got a 13t pinion with 3.5 hole!
On 4s should be around 85% asc
Just waiting for the post.

MariaFan · 02-23-2021, 11:31 AM

Quote:

Originally Posted by jackbraddogs

Finally got a 13t pinion with 3.5 hole!
On 4s should be around 85% asc
Just waiting for the post.

Great news!
I was just wondering if you had found the pinion yet.

spova · 02-06-2023, 10:42 AM

is the main gear mod.5? How/where is everyone looking for and finding pinion options for different motors?

MariaFan · 02-07-2023, 04:00 PM

Quote:

Originally Posted by spova

is the main gear mod.5? How/where is everyone looking for and finding pinion options for different motors?

Check and see what a stock Align Trex 450 is.

I can't remember what mod they are.

spova · 02-08-2023, 09:58 AM

Iv found a few places that claim mod.05 for the straight gears and mod.06 for the helical "slant" gears but was hoping someone would confirm thats what they actually got and it worked.

MariaFan · 02-08-2023, 01:12 PM

The straight gears and straight pinions from AMain work together, as well as the slanted flavor.

https://www.amainhobbies.com/align-s...5156qa/p247775

spova · 02-08-2023, 08:37 PM

And Amain lists the pitch there too, nice. Thanks.

MariaFan · 02-09-2023, 06:26 AM

I've always gotten great service at AMain.

02-19-2021, 05:16 AM	#1 (permalink)
jackbraddogs Registered Users Join Date: May 2016	Trex Twin Chinook pinion Hi, Nearing the end of my Chinook build and have hit a snag. I am using the scorpion HK2520 motor and an 11t pinion But the motor has a 3.5mm diam shaft and the pinion is 3.12mm diam hole. Where can I get one in the UK? Philip

02-20-2021, 03:54 AM	#3 (permalink)
jackbraddogs Registered Users Thread Starter Join Date: May 2016	Chinook pinion Hi, That’s very interesting! I have been following Joe’s instruction and he uses 11t with 4s! I have got one from Midland Helicopter VIA eBay as they didn’t have any in their store. I will order a 12t one as well just for variety Thanks for your input

02-20-2021, 10:22 AM	#4 (permalink)
jackbraddogs Registered Users Thread Starter Join Date: May 2016	Chinook pinion Well, here I have the usual problem! -I have an 11t pinion that would fit the chinook main gear, but won’t fit the motor recommended AND a 11t pinion that will fit the motor but not fit the main gear! I suppose I could drill out the smaller hole, but I would rather just buy one. Please can anyone help?

02-23-2021, 04:42 AM	#5 (permalink)
jackbraddogs Registered Users Thread Starter Join Date: May 2016	Pinion Finally got a 13t pinion with 3.5 hole! On 4s should be around 85% asc Just waiting for the post.

02-06-2023, 10:42 AM	#7 (permalink)
spova Registered Users Join Date: Jan 2022 Location: North America	Main gear pitch is the main gear mod.5? How/where is everyone looking for and finding pinion options for different motors?

02-19-2021, 07:11 PM	#2 (permalink)
co_rotorhead Registered Users Join Date: Jun 2006	I'm using the same motor but went with a 12T pinion. That gives me 1800 RPM at 90% ESC capacity running on a 4S battery. An 11T pinion on 4S would put me at almost 100%, which is too high, in my opinion.

02-08-2023, 09:58 AM	#9 (permalink)
spova Registered Users Join Date: Jan 2022 Location: North America	Iv found a few places that claim mod.05 for the straight gears and mod.06 for the helical "slant" gears but was hoping someone would confirm thats what they actually got and it worked.

02-08-2023, 01:12 PM	#10 (permalink)
MariaFan Registered Users Join Date: Apr 2015 Location: Ohio	The straight gears and straight pinions from AMain work together, as well as the slanted flavor. https://www.amainhobbies.com/align-s...5156qa/p247775 spova likes this. __________________ . . I have to turn the music down while driving so I can see better.

02-08-2023, 08:37 PM	#11 (permalink)
spova Registered Users Join Date: Jan 2022 Location: North America	I see And Amain lists the pitch there too, nice. Thanks.

02-09-2023, 06:26 AM	#12 (permalink)
MariaFan Registered Users Join Date: Apr 2015 Location: Ohio	I've always gotten great service at AMain. __________________ . . I have to turn the music down while driving so I can see better.

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