How It's Made S21E11 · Cast Iron Stoves, Ultralight Aircraft, Snow Groomers, Rubber BandsCast Iron Stoves, Ultralight Aircraft, Snow Groomers, Rubber Bands

Molten iron is poured into moulds, cleaned and finished before the heavy castings are assembled into wood-burning stoves. Lightweight structural components are joined into ultralight aircraft; tracked chassis, hydraulic systems and grooming equipment are combined into machines that maintain snow-covered trails; and cured rubber tubes are sliced into individual rubber bands.