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Nber
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Hello Team,
Had a shower thought, and thought I spend a few minutes online with people much smarter than I to throw an idea at...
So, I have a light weight truck. Say a little dodge dakota pickup that weighs +/- 3000lbs.
I want to take out the motor and replace it with a little baby 20hp motor. So take off 500lbs to remove the current motor, say add back 100 for the 20hp. Obviously this would slow this dude down significantly, especially during acceleration. Highway speeds could be reached/maintained, but getting there would take forever. No big deal.
My thought... Get a little 5 hp gas motor, and dedicate it solely to a *big* flywheel. Spin that sucker at 15,000 rpm. Maybe its a solid disc (i=1/2mr^2) 200lb and 3' in diameter. A big guy spinning real fast. Now we add 200lb for the flywheel and another 200lbs for the other "stuff" (5hp motor, shafts, gas, whatever), it brings us back to 3,000 lbs ish for the total weight.
With my little 20hp motor (which would do pretty good on gas mileage), when I'm at a stop light, that little 5hp motor has got our flywheel up to speed (15,000 rpm). I hit the gas, the truck slowly starts to move from the 20hp motor, BUT now we kick in the Kinetic energy of the flywheel via a torque sensor or something, probably manual for now... That bad boy takes off like a porsche on cocaine. Really I'm just trying to get down to the specifics, the thought experiment boiled down...
1. What rpm would a 3' 200 lb disc need to be rotating to drive a 3000lb vehicle from 0-30 in 2.5 seconds?
2. How much would it slow?
3.Then, when the 20hp motor kicks back in and keeps us rolling at that speed, how long for the 5hp motor to get us back up to the desired rpm. I live on a farm, would love to experiment. Would be great for city driving with all these freaking stops lights!
Thanks in advance. Any thoughts would be incredible.*Obviously this is a play on gas mileage... 25hp vs 100hp I'm assuming would be non negligible in gas savings in the city...
'
Had a shower thought, and thought I spend a few minutes online with people much smarter than I to throw an idea at...
So, I have a light weight truck. Say a little dodge dakota pickup that weighs +/- 3000lbs.
I want to take out the motor and replace it with a little baby 20hp motor. So take off 500lbs to remove the current motor, say add back 100 for the 20hp. Obviously this would slow this dude down significantly, especially during acceleration. Highway speeds could be reached/maintained, but getting there would take forever. No big deal.
My thought... Get a little 5 hp gas motor, and dedicate it solely to a *big* flywheel. Spin that sucker at 15,000 rpm. Maybe its a solid disc (i=1/2mr^2) 200lb and 3' in diameter. A big guy spinning real fast. Now we add 200lb for the flywheel and another 200lbs for the other "stuff" (5hp motor, shafts, gas, whatever), it brings us back to 3,000 lbs ish for the total weight.
With my little 20hp motor (which would do pretty good on gas mileage), when I'm at a stop light, that little 5hp motor has got our flywheel up to speed (15,000 rpm). I hit the gas, the truck slowly starts to move from the 20hp motor, BUT now we kick in the Kinetic energy of the flywheel via a torque sensor or something, probably manual for now... That bad boy takes off like a porsche on cocaine. Really I'm just trying to get down to the specifics, the thought experiment boiled down...
1. What rpm would a 3' 200 lb disc need to be rotating to drive a 3000lb vehicle from 0-30 in 2.5 seconds?
2. How much would it slow?
3.Then, when the 20hp motor kicks back in and keeps us rolling at that speed, how long for the 5hp motor to get us back up to the desired rpm. I live on a farm, would love to experiment. Would be great for city driving with all these freaking stops lights!
Thanks in advance. Any thoughts would be incredible.*Obviously this is a play on gas mileage... 25hp vs 100hp I'm assuming would be non negligible in gas savings in the city...
'
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