Test 12/07 : negative with 40cm parabolic antemna and adhesiv tap: th cylindr of th piston is transparent and the heat of th concentrated sun rays doesnt heaten up well the cylindr. W cant tak to pieces th egin to put steel whool inside lik in stag 1 video. Test tomorrow with tinfoil glued to the cylindr. Otherwis need to find an engin with metal cylindr
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