R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 08-03-2010, 01:01 PM   #1
Tech Adept
 
FaanP's Avatar
 
Join Date: Jul 2010
Location: South Africa
Posts: 176
Default 2 speed gear combinations

Hi All

I'm pretty new to forum, but have been reading a lot here.

I bought my self a Motonica P81 and I'm busy getting it ready for my first time out with it - I'm pretty new to 1/8th on road racing.

Our Local track is very tight and I'm looking to get a "shorter" gear ratio.

How do I determine which spur and pinion combinations to use for first and second and still have a good mesh on the gears? For example - I don't think I can can increase the amount of teeth on the spur for first by 3 teeth and expect the second gear spur and pinion still to mesh properly - or am I wrong?

Regards
Faan Pretorius
FaanP is offline   Reply With Quote
Old 08-03-2010, 01:09 PM   #2
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,861
Trader Rating: 24 (100%+)
Default

They are all the same size so any of them will work. Any combination of first gears will work with any combination of second gears.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 08-03-2010, 01:15 PM   #3
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,278
Send a message via ICQ to Roelof
Default

On short tracks you can start with the standard gearbox gears and go down to 16/19 pinion or even 15/19
__________________
The quality of an answer comes with the quality of the question.
Roelof is online now   Reply With Quote
Old 08-04-2010, 02:27 AM   #4
Tech Adept
 
FaanP's Avatar
 
Join Date: Jul 2010
Location: South Africa
Posts: 176
Default

Thus, if I understand correctly I can leave my spur gears as and chop and change my pinions how I feel like?
FaanP is offline   Reply With Quote
Old 08-04-2010, 02:36 AM   #5
Tech Elite
 
blis's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2008
Location: Brisbane
Posts: 3,434
Default more..

Quote:
Originally Posted by FaanP View Post
Thus, if I understand correctly I can leave my spur gears as and chop and change my pinions how I feel like?
Unless things have changed recently, module gearing maintains a constant diameter, what has caught me out is the diameter split in mm between the two gears (both pinion and spur) diameters, hence I couldnt use a mugen clutch on a team magic.

http://en.wikipedia.org/wiki/Gear#The_module_system
__________________
RC Cars: E4/G4/TCX/LAB-C02/T4'15/MM Engines
WEB: Beachmums Racing - MYRCM Race Registration
Media: Amain - RCRacingTV - RedRC - LiveRC - blisx264
blis is offline   Reply With Quote
Old 08-04-2010, 03:34 AM   #6
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,278
Send a message via ICQ to Roelof
Default

Quote:
Originally Posted by blis View Post
Unless things have changed recently, module gearing maintains a constant diameter, what has caught me out is the diameter split in mm between the two gears (both pinion and spur) diameters, hence I couldnt use a mugen clutch on a team magic.

http://en.wikipedia.org/wiki/Gear#The_module_system
In these days all brands use over- and underpitching to keep the same diameter of the gear. The shape of the teeth is the only different to do this.
__________________
The quality of an answer comes with the quality of the question.
Roelof is online now   Reply With Quote
Old 08-04-2010, 04:08 AM   #7
Tech Adept
 
FaanP's Avatar
 
Join Date: Jul 2010
Location: South Africa
Posts: 176
Default Thanks

Thanks guys - it is clear now.
FaanP is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
The Speed Passion Thread memix Electric On-Road 13377 11-28-2017 11:06 PM
Tamiya TG10 Mk.2 JLock Nitro On-Road 117 06-19-2017 02:21 PM
2 Speed Gear box for HPI NYCdragRacer Oval, Larger Scales and More 8 03-10-2010 01:56 AM
Tamiya Evolution III & 2-Speed Trans capricess Electric On-Road 7 01-17-2003 01:06 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:57 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net