Dickey_Butts [none/use name] to diy • 6 months agoDIY Sand Battery Space Heaterexternal-linkmessage-square21 fedilinkarrow-up124
arrow-up124external-linkDIY Sand Battery Space HeaterDickey_Butts [none/use name] to diy • 6 months agomessage-square21 Commentsfedilink
Probably a Stirling generator