[Stoves] Using a differential windlass as motive power for stove

[Steve Taylor]

drew wrote:
>     So a simple electric fan alternative that might be explored is a fan 
> based on a differential windlass.    Differential windlass systems were 
> often the motive force behind grandfather clocks (taking the high torque 
> low rpm energy from a slowly dropping weight and turning it into a high 
> rpm low torque) . 
Lets say we need 3W for a blower (underrated, in my estimation), and 
that we are going to dissipate the energy over a burn of say 2 hours, we 
need to hold
3x3600 joules =10.800 joules. Lets raise a weight say 2 metres (just 
under 7 feet), what weight do we need ?
10,800=MxgxHor M=10800/2/10 =540 kg, half a ton. Is that practical ? 
Double the height (14feet), 270 kg, double it again (28 feet), 123kg.
Is that practical ?
Electricity in the 21st century is not high tech.

Steve