Around The Table With Paul Lemieux(RC-America/Thunderpower)
01-17-2008, 09:18 AM
#212
Wow, that's a long time ago!
I remember at the reedy race in ripon ages ago a young paul lemieux spinning sharp glass and aluminum pit boards on his finger like he was some sort of harlem glob trotter or something...
I remember at the reedy race in ripon ages ago a young paul lemieux spinning sharp glass and aluminum pit boards on his finger like he was some sort of harlem glob trotter or something...
me
KB
01-18-2008, 11:07 PM
#216
. Spur/pinion=ratio. We have to multiply with same number on each side, ie. (1,04/1,04)*(100/25)=4*(1,04/1,04) which equal 104/26=4 
. Paul on the other hand is right, found some theory about gearing in a site written by Professor James F. Young from Rice University.
More acceleration in gearing is also explained:
http://cnx.org/content/m13594/latest/
01-19-2008, 08:33 AM
#217
stokka, thanks for looking into this. So after doing a bit more reaserch what do you think?, or is it not even true. gearing (80 /20 ) less acceloration than (100/25).
not that it really matters but maybe good to know
not that it really matters but maybe good to know
01-21-2008, 11:15 AM
#218
After my research , you were right from the start Paul. 80/20 will give less acceleration than 100/25. And 80/20 will give more high end/top speed.
The reason is a bigger spur will give more turn force.
And the smaller pinion/spur combination will give less rotational mass, added to the shorter distance for pinion to travel makes it easier for motor to peak rpm.
In addition on the larger spur, the pinion hits the teeth further away from the axle thus invoking more force. (The force applied to a lever, multiplied by its distance from the lever's fulcrum, is the torque)
~stokka
, you were right from the start Paul. 80/20 will give less acceleration than 100/25. And 80/20 will give more high end/top speed. The reason is a bigger spur will give more turn force.
And the smaller pinion/spur combination will give less rotational mass, added to the shorter distance for pinion to travel makes it easier for motor to peak rpm.
In addition on the larger spur, the pinion hits the teeth further away from the axle thus invoking more force. (The force applied to a lever, multiplied by its distance from the lever's fulcrum, is the torque)
~stokka
01-22-2008, 02:08 PM
#220
Tech Adept
In addition on the larger spur, the pinion hits the teeth further away from the axle thus invoking more force. (The force applied to a lever, multiplied by its distance from the lever's fulcrum, is the torque)
01-22-2008, 05:55 PM
#222
JP: No I dont have plans as of right now to go, is it the same week as the carpet nats? (why you want a peice of me? or maybe the whole thing)lol
01-23-2008, 12:41 PM
#225
Paul: By the way thank you for making your self available for us in this forum, It's great to get valueable tips from an outstanding racer!
~stokka
Last edited by stokka; 01-23-2008 at 12:54 PM.