Re:First batch of student’s washing machines shipped to Iraq
by kaybe on Friday August 13, 2021 @10:50AM
(#28169579)
Here is an olympic cyclist barely managing to toast bread:
https://www.youtube.com/watch?v=S4O5voOCqAQ
Electricity is nice.
Re:First batch of student’s washing machines shipped to Iraq
by dragontamer on Friday August 13, 2021 @11:48AM
(#28170470)
The idea that a singular man can output a horsepower (~700W) for enough time to toast bread is still very impressive to me!
Clearly an Olympic-level athlete. That being said, I can't help but imagine that with some optimization, it could make the electricity generation a bit easier (maybe more RPM but less torque needed?). Clearly, the video shows him straining and pushing.
Power == RPM * Torque, converting to less torque but more RPM with gears probably would be easier.
Re:First batch of student’s washing machines shipped to Iraq
by rhn_mk1 on Friday August 13, 2021 @01:20PM
(#28171761)
> A horse working for an hour nonstop would be .7kW hrs.
More like 8.4kWh.
> data from the horse pulling contest at the 1925 Iowa State Fair showing that peak mechanical power output of a horse is 12-14.9 HP.
Re:First batch of student’s washing machines shipped to Iraq
by Animats on Friday August 13, 2021 @03:14PM
(#28173201)
That's peak. Average is much lower. 1 HP is supposed to be a horse on a treadmill for a full day of work. A horse in acceleration is outputting far more than that for a few seconds.
One horsepower is .7 kW. A horse working for an hour nonstop would be .7kW hrs.
Now, how many men do you need working constantly before you have comparable strength to a 20kW generator sipping a little bit of gasoline?