- #1
lucioc
- 6
- 0
Hello guys,
I'm looking for some help. I'm reading a paper called "On Flywheel Leg Press Design and its Benefits". I'm interested in calculate the forces that a flywheel machine that I'm building (used for gym exercises) will require the user to use it. Following this paper, they start to calculate the flywheel mass, and they predetermine a range of forces and acceleration values in a table. This is what appears on the paper:
So, if I understood it correctly, when we have a force F = 2670N, and a acceleration a = 4 m/s² the mass of the flywheels are 3.338Kg. In this special case they use two flywheels, with 2 discs each (not sure how this influence). The problem is that when I try to use the functions they talk about using the values on the table, I'm not able to get the same result... like:
m = 2 * ( 2670N / 4m/s² ) * (0.3048² / 0.1524²) = 1335 * 4 Kg
That doesn't make sense. I'm probably getting some unit wrong or missing some equation in the middle. Can someone help to find out how they calculate the mass? Maybe the paper is not so clear in this. I want to understand it first so I can calculate the force giving I already have a mass and acceleration.
Thanks for any help,
Lucio
I'm looking for some help. I'm reading a paper called "On Flywheel Leg Press Design and its Benefits". I'm interested in calculate the forces that a flywheel machine that I'm building (used for gym exercises) will require the user to use it. Following this paper, they start to calculate the flywheel mass, and they predetermine a range of forces and acceleration values in a table. This is what appears on the paper:
So, if I understood it correctly, when we have a force F = 2670N, and a acceleration a = 4 m/s² the mass of the flywheels are 3.338Kg. In this special case they use two flywheels, with 2 discs each (not sure how this influence). The problem is that when I try to use the functions they talk about using the values on the table, I'm not able to get the same result... like:
m = 2 * ( 2670N / 4m/s² ) * (0.3048² / 0.1524²) = 1335 * 4 Kg
That doesn't make sense. I'm probably getting some unit wrong or missing some equation in the middle. Can someone help to find out how they calculate the mass? Maybe the paper is not so clear in this. I want to understand it first so I can calculate the force giving I already have a mass and acceleration.
Thanks for any help,
Lucio