Bowser HO #1-150001 Kit SP-1 Semi-Vanderbilt Tender

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  • Item Category: Toys, Dolls, Games & Puzzles
  • Source: eBay
  • Sold Date: Nov 01, 2010
  • Channel: Auction House
Bowser HO #1-150001 Kit SP-1 Semi-Vanderbilt Tender
This is an all die-cast kit complete with 6-axle wheel sets for advanced modelers
By the mid-1800s most steam locomotive tenders consisted of a fuel bunker(that held coal or wood) surrounded by a "U" shaped (when viewed from thetop) water jacket. The overall shape of the tender was usually rectangular. The bunker which held the coal was sloped downwards toward the locomotive providing easier access to the coal.

The ratio of water to fuel capacities of tenders was normally based on two water-stops to each fuel stop because water was more readily available than fuel. One pound of coal could turn six pounds of water (0.7 gallons) to steam. Therefore, tender capacity ratios were normally close to 14 tons of coal per 10,000 gallons of water. One exception to this were the NYC tenders which were designed to pick up water at speed from track pans. These tenders had a much larger coal to water ratio.

Other factors which determined the size of tenders were turntable length. Some railroads bought large locomotives with small tenders so that they could still be turned on their existing turntables. In many cases, these tenders were replaced with larger ones as larger turntables became available. Construction styles also determined tender size. In 1927 the first solid steel cast tender frame made it possible to attach a single large tank called a "water bottom". These tenders could hold 1,500 to 2,000 more gallons of water then previous tenders could.

A round tank has several advantages over a rectangular tank.

A round tank holds more than a rectangular tank of the same surface area. A round tank (a cylinder) is stronger than a rectangular tank (a box). A round tank is lighter than a rectangular tank of the same capacity (partially because a rectangular tank requires a great deal of internal bracing). On May 31, 1901, a patent was issued to Cornelius Vanderbilt for a tender with a cylindrical water tank (Cornelius was the great grandson of the Commadore). Some railroads went for Vanderbilt tenders in a big way. Others did not. Railroads that adopted the Vanderbilt style tender for many of their steam locomotives include: Baltimore & Ohio Canadian National Grand Trunk Western Great Northern Southern Pacific Union Pacific