Maybe 6 hours - leave some time for eating...

Hul

Brian Whatcott wrote:
Hul Tytus wrote:
...If you lift 550 pounds one foot
every second and keep that going for 12 hours or so every day, you are a
horse. ..

Hul

This has been tried: in 12 hours, they ended up with a DEAD horse. James
Watt didn't want any customer nit-picking about HIS horse-power so he
penciled in a generous power margin. But your numbers are good, of course.

Brian W