Posted by RedGreenGuy on July 02, 2018 at 19:57:29 from (170.52.14.156):
In Reply to: Re: The End Of An Era posted by gtractorfan on July 02, 2018 at 17:34:36:
If ball of rail shaped as designed actual area of wheel contact to rail is not much larger than a dime. The steamers did not flex on curves, thus a locomotive with 4 drive axles, when on curved track, had lead and rear drivers with less than maximum area in contact with the rail. therefore wheel spin happened much more easily on a curve. Sand was a help with traction, but when that failed the engineer had to reduce power to all drivers. Final result was train slows and stalls. Wheel slip on new computerized locomotives is corrected instantly and just to the slipping axle so balance of traction axles continue to pull. The truck or set of axles on each end of locomotives turns on curves as well as each axle within each truck is computer controlled to move keeping more of the wheel in contact with the rail. Creating unbelievable tractive effort.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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