I have one of the old Dremel lathes, and I could turn the vents, but making 9 identical large vents seems unlikely. The smaller vents would be more difficult to duplicate, and I need at least 6 of those. The best way to make these HO scale
vents is to 3D print all of them on a single sprue. I thought of making a master and two part mold and casting them in resin, but 3D printing would be less costly.
Nelson Moyer
From: CBQ@groups.io <CBQ@groups.io> On Behalf Of
Steven Holding
Sent: Wednesday, January 31, 2024 9:23 PM
To: CBQ@groups.io
Subject: Re: [CBQ] Roof Vents for the Former Grain Elevator in Burlington Iowa
Chuck a piece of 1/2 dowel in a drill chuck and turn one out, Sand and paint silver and then weather
I've done that to make some columns for over hangs
As most people on this list know, the export grain elevator in Burlington exploded and burned, damaging the adjacent concrete silo, which were
subsequently demolished and rebuilt. The story is told in BB#23. I am building a selectively compressed HO model of the elevator complex for my layout, and I have all of the material I need to draw plans and construct the model except for the roof vents.
The roof vents on the Burlington elevator were of two styles, a large vent with a cylindrical ring under the main vent and a smaller vent without
the ring. The shape of both vents is the same, except for the absence of the ring on the smaller vent. It would be helpful to know the manufacturer and model of these vents and ideally to find drawings, advertisements, or better photos of the vents. Lacking
better information, the vents can be approximated from the attached closeup photos. No commercially available roof vents resemble these vents, so to model them accurately, it is necessary to draw the vents in CAD and have them 3D printed. I will need at least
nine large vents and six small vents, based upon photos the elevator when it was owned by Norris Grain Company. I may need more of each size, because the East side of the elevator isn’t shown in any of the available photos.
I don’t have a CAD program, nor do I know how to use one to draw a 3D approximation for 3D printing. If anyone in the group has better photos or
other materials that would be helpful in producing these vent, please share. If anyone is proficient with CAD and is interested in contributing to this project, that would be wonderful.
Nelson Moyer
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