Internal ratio help???
#1
Internal ratio help???
Do different internal ratios apply power differently? Does it put different loads on the motor? Or is it once I set the rollout it is all the same?
Cheers josh
Cheers josh
#2
It's all the same.
#3
Tech Fanatic
iTrader: (8)
I agree. I dont know why some people who have no engineering background (hobby shop owners)make comments like how modern cars are better than the older ones becuase of the lower internal ratio,like the so call modern ratio is more suitable for brushless and such. Like for instance many new cars have IR of 2.0 to 1.8 and the older ones from 6 -12 years back was 2.25-2.4
It doesnt matter at all, rollout is the important factor.
It doesnt matter at all, rollout is the important factor.
#4
Tech Fanatic
iTrader: (37)
I agree. I dont know why some people who have no engineering background (hobby shop owners)make comments like how modern cars are better than the older ones becuase of the lower internal ratio,like the so call modern ratio is more suitable for brushless and such. Like for instance many new cars have IR of 2.0 to 1.8 and the older ones from 6 -12 years back was 2.25-2.4
It doesnt matter at all, rollout is the important factor.
It doesnt matter at all, rollout is the important factor.
#7
Tech Master
iTrader: (15)
Actually I think it has something about the physics of having a smaller layshaft pulley than today's larger pulleys. I did a comparison back in the day before brushless was around and hand pushed two highly competitive different brushed cars, one with 1.77 and one with 2.25 and the one with the 2.25 had much more resistance. Meaning it wasn't able to go as far.
But i will agree that with today's brushless and practically common ratios between all cars, they're all equal.
But i will agree that with today's brushless and practically common ratios between all cars, they're all equal.
Last edited by trigger; 10-10-2012 at 09:55 PM.
#8
Tech Fanatic
iTrader: (37)
Actually I think it has something about the physics of having a smaller layshaft pulley than today's larger pulleys. I did a comparison back in the day before brushless was around and hand pushed to different brushed cars, one with 1.77 and one with 2.25 and the one with the 2.25 had much more resistance. Meaning it wasn't able to go as far.
But i will agree that with today's brushless and practically common ratios between all cars, they're all equal.
But i will agree that with today's brushless and practically common ratios between all cars, they're all equal.
#9
Tech Master
iTrader: (15)
Bearings, motors, belt tention and gear mesh all could make that test inaccurate. One bearing starting to go or a slight differance in gear mesh or belt tension could make a differance in the outcome. A free moving drivtrain will have a lot more efect on the car than will the internal ratio.
#10
Cool thanks for all your help
#11
There is no doubt that bigger pulleys are more efficient, and no doubt that lower internal ratios make it easier to gear stock brushless motors - but that is not the same as saying that a certain internal ratio is better.