Originally Posted by beefheart
Ok speaking of sustenance living / living off the land why not live off of the sun?
Has anyone ever heard of a solar stirling engine? There is one video on youtube where they use a large fresnal lense to heat a solid steel pipe that then transfers heat to run the engine. If you mount these around a pole then have the fresnal lenses follow the sun somehow you could probably power a heavier duty motor like the custom 5 hp one someone converted a lawnmower engine or something into right?
I don't think I've seen any really efficient solar projects that use Fresnel lenses...
Anyway, most solar projects that heat water or oil or what ever use curved mirrors to focus sun energy on a pipe,
They use multiple mirrors to focus sun energy on a single spot, which is usually the side of a storage tank/boiler.
Most 'Sterling' engines use heated air to turn something like fan blades, not much torque is required.
Since air is 800 times less dense than water, and since the heat required to make much pressure far exceeds the ability of the sun, I wouldn't think you could do much with a solar powered 'Sterling' engine.
On the other hand, you can run some pretty healthy appliance off of just a few Solar PV (Photo Voltaic) panels and an inverter.