Physics Calculations on the winch for the kicker
Posted: January 19th, 2010, 7:30 pm
Please see the other forum for formulas.
Assumptions
The radius of the winch is 5/16"(Half of a 5/8" axle) or .0079 meters
Winch rope distance is 24"
Specs
Stall Torque = 450 mNm = .45 Nm
RPM = 15,600
Fisher price in Transmission in High Gear (30.1:1)
.45 * 30.1 = 13.545 Nm
13.545 = .0079 * Fg
Fg = 1714.55N = 174 Kg = 383 Pounds.
15,600/30.1 = 518.2724
Speed = 16.95 in/sec
I think this one is MUCH more reasonable. We have a decent torque on the bar, and we have an extremely fast winch up speed.
Fisher Price in Double Doozy GEM Two Stage am-0586 (22.6:1)
.45 * 2 = .9 Nm //This is because the double doozy uses 2 Fisher Price motors
.9*22.6 = .0079 * Fg
Fg = 2574.68 /9.8 = 262.722 Kg = 579 Pounds //WAY more than what we need.
15,600/22.6 = 6902 RPM
Speed = (5/16 * 2 * pi * 6902)/60 = 225.505 in/sec. //Needless to say this is overkill.
Fisher Price in Double Doozy * Transmission Assuming low gear of 30.1:1 (680.26:1)
.9 * 680.26 = .0079 * Fg
Fg = 77497.97 / 9.8 = 7907.95 Kg = 17434 Pounds
15,600/680.26 = 22.933 RPM
Speed = (5/16 * 2 * pi * 22.933)/60 = .75 inches per second (Not exactly an ideal speed)
Fisher Price in Double Doozy * Transmission Assuming in higher gear of 7.5:1 ( 169.5:1)
.9 * 169.5 = 152.55 Nm = .0079 * Fg
Fg = 19310.12 N /9.8 = 1970 Kg = 4343.10 pounds
15,600/169.5 = 920.353 RPM
Speed = (5/16 * 2 * pi * 920.353)/60 = 30 in/sec.
The high RPM of the fisher price motors allow us to take extreme reductions while keeping the shaft linear speed fast.
Window Motor with no reduction
Stall Torque = 10 Nm
10 Nm = .0079 * Fg
Fg = 1265 N = 129 Kg = 284 Pounds
(5/16 * 2 * pi * 84)/60 = 2.74 in/sec
I can see just my looking at these initial calculations that the window motors will be much more realistic to feed into the transmission. Although, from the one to one, we would have to do a 1:6 gear ratio for speed into the shifter. Which means that the thing that do roughly 46 pounds before stalling, but it'd be much faster.
I think we'll need the two fisher prices for either a) the rollers or b) the telescoping arm system
Assumptions
The radius of the winch is 5/16"(Half of a 5/8" axle) or .0079 meters
Winch rope distance is 24"
Specs
Stall Torque = 450 mNm = .45 Nm
RPM = 15,600
Fisher price in Transmission in High Gear (30.1:1)
.45 * 30.1 = 13.545 Nm
13.545 = .0079 * Fg
Fg = 1714.55N = 174 Kg = 383 Pounds.
15,600/30.1 = 518.2724
Speed = 16.95 in/sec
I think this one is MUCH more reasonable. We have a decent torque on the bar, and we have an extremely fast winch up speed.
Fisher Price in Double Doozy GEM Two Stage am-0586 (22.6:1)
.45 * 2 = .9 Nm //This is because the double doozy uses 2 Fisher Price motors
.9*22.6 = .0079 * Fg
Fg = 2574.68 /9.8 = 262.722 Kg = 579 Pounds //WAY more than what we need.
15,600/22.6 = 6902 RPM
Speed = (5/16 * 2 * pi * 6902)/60 = 225.505 in/sec. //Needless to say this is overkill.
Fisher Price in Double Doozy * Transmission Assuming low gear of 30.1:1 (680.26:1)
.9 * 680.26 = .0079 * Fg
Fg = 77497.97 / 9.8 = 7907.95 Kg = 17434 Pounds
15,600/680.26 = 22.933 RPM
Speed = (5/16 * 2 * pi * 22.933)/60 = .75 inches per second (Not exactly an ideal speed)
Fisher Price in Double Doozy * Transmission Assuming in higher gear of 7.5:1 ( 169.5:1)
.9 * 169.5 = 152.55 Nm = .0079 * Fg
Fg = 19310.12 N /9.8 = 1970 Kg = 4343.10 pounds
15,600/169.5 = 920.353 RPM
Speed = (5/16 * 2 * pi * 920.353)/60 = 30 in/sec.
The high RPM of the fisher price motors allow us to take extreme reductions while keeping the shaft linear speed fast.
Window Motor with no reduction
Stall Torque = 10 Nm
10 Nm = .0079 * Fg
Fg = 1265 N = 129 Kg = 284 Pounds
(5/16 * 2 * pi * 84)/60 = 2.74 in/sec
I can see just my looking at these initial calculations that the window motors will be much more realistic to feed into the transmission. Although, from the one to one, we would have to do a 1:6 gear ratio for speed into the shifter. Which means that the thing that do roughly 46 pounds before stalling, but it'd be much faster.
I think we'll need the two fisher prices for either a) the rollers or b) the telescoping arm system