A couple of days ago, a TC-497 Overland Train Design Report became available for sale on eBay. The initial cost was set at $7,000. A day or so later, the price is decreased to $3,000 or best offer. After reviewing the photos in the eBay ad, the front cover is stamped with the name Sam Duncan.
Upon thinking up the idea for the TC-497, R.G. LeTourneau advertised for an engineer help help build the machine. Sam Duncan (Duncan) was hired to implement LeTourneau’s idea. When Duncan arrived in Longview, TX at LeTourneau’s facility, the TC-497 was already in the design phase. Once completing it, men who worked on it use to call it a mobile city.
Duncan contributed to the project after writing the technical manual for the Overland Train.