Sand-Heizung und Stirlingmotor flammenlos mit HHO betrieben (engl. sub)

-30

-15

-5

-1

+15

+30

- 1:13:15

Sand heater and Stirling engine operated flamelessly with HHO. Another kind of efficiency https://www.freefromfuel.com/customer-photos/

File Size: 371 MB