I have constructed a vintage style disc wheel exhaust fan for the side wall of the next structure I am building. This took a lot more time than I thought it would. This next structure is a combination storage and work shop structure for the building supply company.
I built this starting with a ring cut from a piece of plastic tubing about 4 scale feet in diameter. I then added cross supports for the fan hub using small wire scraps. Lastly I made some fan blades from paper. I made several attempts at this. The result is OK and should look decent in the building side on the layout.
Above is a prototype of this style fan.
Above is another version of this fan in a wood frame with a steam driven motor attached. I will have a similar frame inside my building.
I am not aware of any commercial detail part for a vent fan of this type.
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