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Re: [CBQ] Re: Gasoline motor car 1905

To: <CBQ@yahoogroups.com>
Subject: Re: [CBQ] Re: Gasoline motor car 1905
From: "cvlk" <cvlk@comcast.net>
Date: Fri, 13 Aug 2010 10:31:44 -0500
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I think Bill has the right idea.   The Four Wheel truck has a lot of mass (Six 
Wheel even more) so Newton's Law plus the more extensive and mechanically 
advantaged springing of a truck far outweighs what you could do with 
effectively separately cushioning a single wheel.
I haven't been on the Talgos in the Pacific Northwest but imagine the only 
reason they have had the success that they have enjoyed is because of the 
advent of welded rail.
That, and the fact anything that provided new cars for a needed service would 
be favorably received.   If a modern real Budd trainset built to 1949 
structural standards were substituted I am sure it would be preferred over the 
Talgo.... it would be like comparing a Yugo to a Cadillac.
Charlie Vlk
    
  Steve,

  The primary reason for the instability of the Areotrain was the 
  prevalence of 39 foot jointed rail at the time. The staggered joints 
  caused alternating impacts to the single wheels at the four corners 
  of the cars. The four wheel truck on the Zephyrs cushioned and 
  dampened those impacts within the truck assembly rather than transmit 
  it to the carbody. the later common use of welded rail would have 
  considerably improved the ride. Keep in mind that Europe used four 
  wheel cars for many years, but their rail joints aren't staggered. 
  The wheels on both sides of the car hit the joint at the same time 
  making it more like a minor bump rather than an alternating impact.

  Bill Barber
  Gravois Mills, MO




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