- #1
prodriverex
- 9
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OK I'm super frustrated.. I spent 50min typing the whole text here earlier and click preview only to be told I was logged out. Click back and and all was gone. Damn..
Ok here's the question, AGAIN.
Weight: 1kg
Type: Flywheel, OD is 80mm, ID is 40mm if that matters.
So that's a typical Ring calculation?
Torque, T = Moment of Inertial, I * Angular Acceleration, α
HP = N * T/5252
MOI, I, depends on Ring or Solid
Solid cylinder = (1/2)*m*R2
Hollow cylinder = m*R2
So if this is ring, then I = 1kg * 0.08 * 0.08 = 0.0064
Angular Acceleration, α (rad/s2): dω / dt = αT/ r.
ω is the angular velocity
αT is the linear tangential acceleration.
r is the radius
Simpler term, one radian (rad) is one revolution, i.e 2∏
So if the unit is rad/s2 is essentially how many rad in a squared-second?
If it is true, t being 8000rpm or 133.333 rev/sec. In square sec, divide further by 60.
Therefore, 133.333/60 = 2.222 rad/s2
Torque, T = 0.0064 * 2.222 = 0.0142 (Nm?)
So HP = 8000 * 0.0142 / 5252 = 0.02166 hp? Doesn't look right!
Appreciate any enlightenment please. Thank you..
Ok here's the question, AGAIN.
Weight: 1kg
Type: Flywheel, OD is 80mm, ID is 40mm if that matters.
So that's a typical Ring calculation?
Torque, T = Moment of Inertial, I * Angular Acceleration, α
HP = N * T/5252
MOI, I, depends on Ring or Solid
Solid cylinder = (1/2)*m*R2
Hollow cylinder = m*R2
So if this is ring, then I = 1kg * 0.08 * 0.08 = 0.0064
Angular Acceleration, α (rad/s2): dω / dt = αT/ r.
ω is the angular velocity
αT is the linear tangential acceleration.
r is the radius
Simpler term, one radian (rad) is one revolution, i.e 2∏
So if the unit is rad/s2 is essentially how many rad in a squared-second?
If it is true, t being 8000rpm or 133.333 rev/sec. In square sec, divide further by 60.
Therefore, 133.333/60 = 2.222 rad/s2
Torque, T = 0.0064 * 2.222 = 0.0142 (Nm?)
So HP = 8000 * 0.0142 / 5252 = 0.02166 hp? Doesn't look right!
Appreciate any enlightenment please. Thank you..