Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

"It's just stainless" .....what i thought too, but after trying 5 new various size HSS drill bits without a dent or single scarf curl result, it's been Undrillum so far, but eventually if I gotta use a laser !!.... tom

Saw a video from a show somewhere that had a whole display of engines not much larger than these running indoors, all of them hooked up to a propane or butane distribution system. They were obviously running them for a long time, the owners sitting back in chairs chatting as the public filed through. The system seemed to use camp stove type burner controls to regulate gas feed, and ordinary h and m mixer to feed air. That’s the ticket if you’re a die hard indoor running enthusiast.

I’m interested because my current abode is a second floor apartment with no access to the back yard, so outdoors means fronting the nearby sidewalk, and indoors means clever ventilation and in winter that means it gets cold pretty quick.