front main gear

yuvalnet · 05-11-2012, 01:42 AM

Hello
I have Gaui 425
front main gear was 42T and i like to put 50T
61T main rear gear
14T pinion
19T one way gear
What i need to do?
In the manual 42T>14T = 9.63:1
50T>14T = 11.46:1

pug907 · 05-11-2012, 01:41 PM

Hi, what do you mean? "what I need to do?"
Do you mean how do you change it?
Do you know what your headspeed is going to be after this change? it is definitely going to be a lot slower.
To work out your headspeed, RPM is motor Kv x 22.2(volts),
(front main /pinion) x (rear main/one way)
Then divide the RPM by answer from gear calculation = headspeed.
With my 1900Kv motor the headspeed would be 3823RPM with 42T and 3022RPM with 50T.
A big difference

.

Hope this helps, let me know if it doesn't.
Andy

05-11-2012, 01:42 AM	#1
yuvalnet Registered Users Join Date: Oct 2011 Location: Isreal	front main gear Hello I have Gaui 425 front main gear was 42T and i like to put 50T 61T main rear gear 14T pinion 19T one way gear What i need to do? In the manual 42T>14T = 9.63:1 50T>14T = 11.46:1

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05-11-2012, 01:41 PM	#2
pug907 Registered Users Join Date: Mar 2012 Location: UK	Hi, what do you mean? "what I need to do?" Do you mean how do you change it? Do you know what your headspeed is going to be after this change? it is definitely going to be a lot slower. To work out your headspeed, RPM is motor Kv x 22.2(volts), (front main /pinion) x (rear main/one way) Then divide the RPM by answer from gear calculation = headspeed. With my 1900Kv motor the headspeed would be 3823RPM with 42T and 3022RPM with 50T. A big difference . Hope this helps, let me know if it doesn't. Andy