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Old 01-27-2017 | 08:21 AM
  #444  
kms7852
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Originally Posted by Dr_T
TLDR: Gearing up increases Power, acceleration, speed and flippage!!11!! Bro .
Dr.T,

I appreciate your feedback and your comments. You have shined a light on interesting concepts of torque such as Angular Momentum, Wheel Axle Torque, traction, and power potential.

Although I am an engineer in F1 industry, your explanation was hard to follow with many variables you have introduced but it was certainly interesting.

So to make this conversation simpler, I want to ask you if we can hold all the variables fixed. Blarks and I have suggested this by suggesting "Fixed Spur gear" and only changing pinion gear. We wanted to claim that higher pinion gear will result in more top speed but less acceleration and lower pinion gear will result in less top speed but more acceleration. This goes back to Brandon32689's original question.

Dr.T, if I may suggest, lets approach this issue scientifically. You have brought up examples of Crawler, and other GT cars.

Let's imagine two same vehicles. Because this is MT410 thread, let's imagine MT410. Two same identical MT410 vehicles. This will help us eliminate variables that you have mentioned such as traction, power potential and many more.

- They will have same internal gear ratio
- They will have same tires
- They will be ran on same surface
- They will have same power system (let's say 2200KV motor with same ESC)
- They will have same weight and battery
- Everything will be the same.

The only difference between two vehicles would be the PINION gear.

1. First vehicle will have 15T
2. Second vehicle will have 25T

Gearing ratio is calculated by SPUR GEAR / PINION GEAR X Internal Gear Ratio

Since in this example, we have same internal gear ratio we will assume it as 1.

The spur gear in this particular vehicle MT410 is 44T.

Therefore, gearing ratio for each vehicle will be
1. 44T / 15T = 2.93
2. 44T / 25T = 1.76

In Gearing 101, you and I both understand that the lower the gearing ratio, the less acceleration it will have and more top speed?
It is visa versa. The higher gearing ratio, the more acceleration and less top speed it will have.

If you do not agree with my above statement, please let me know. Then, this debate is about the fundamentals of gearing ratio

https://en.wikipedia.org/wiki/Gear_train

By the way, Blarks and Ezlight, thank you for your contribution. I am still waiting on Overkill to share his opinion as well.
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