From: rzimmerman@xxxxxx.com Date: January 31, 2006 4:38:19 AM PST To: Bob Graham Subject: 1835 MOUNTAIN HOWITZER Two weeks ago you were gracious enough to send me the original design drawings of the Howitzer.   I have attached some photos of the project for your enjoyment. I thought you would like the pics.   I have a new Grizzly 13 x 40 that was used to make the parts.  The taper bored trunnions were done on a Bridgeport with a boring head.  I cocked the parts in the vice so the concave that mates the barrel comes out with a near perfect fit and keeps the trunnions at 90 deg to the bore. While the taper is at the same angle as the taper on the cannon barrel it doesn't change dia like the taper on the cannon barrel. Over the 2 in. span of the trunnion base there is only .02" rise. They came out close enough to perfect for me. In case you where wondering the bore is 1.74" (golf balls are 1.688"). Thanks again. Rob Zimmerman

 

From: dennis.short@xxxxxx.com Date: June 8, 2006 8:21:38 PM PDT To: Bob Graham Subject: Mountain Howitzer Is it possible to get better copies of the French and US Mountain Howitzers shown on your site or can you tell me the source of these plans?  I would like to produce CG models of these guns. Thanks, Dennis And, the next day: They are done in AutoCAD 2007 as solid models. I'll render them later in Max or Maya. The CAD models are 1:1. I may see if I can create a rapid prototype model of the gun. Will render in Bronze when I can. The next step would be to find a dimension limber or carriage for the gun. Dennis Dennis R. Short is a Professor of Computer Graphics Technology in the School of Technology at Purdue's main campus in West Lafayette, Indiana. Using the original plans for the U.S. Model 1835 Mountain Howitzer, Professor Short rendered these 1:1 images.	Note the touch hole in the sliced image! And the shape of the chamber.
See also computer generated topography from U.S.G.S. DEM files on the Long Camp website.
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