added 2007 Thu Jun 14 1:36:18 by BigKingFun
Learn how to make scenery and landscapes for your model railroad from common household items. You'll save money plus you'll be able to customize your scenery exactly the way you want.
Learn how to make scenery and landscapes for your model railroad from common household items. You'll save money plus you'll be able to customize your scenery exactly the way you want.
added 2006 Tue Aug 22 18:43:37 by capn_caveman
A machine that "taps" on railroad tracks using laser pulses to check for dangerous internal cracking is being tested by the US Federal Railroad Administration (FRA). The laser pulses create ultrasonic waves that travel through rails at high speed. This means the device can scan for cracks while being pulled along a rail track at up to 70 mph.
A machine that "taps" on railroad tracks using laser pulses to check for dangerous internal cracking is being tested by the US Federal Railroad Administration (FRA). The laser pulses create ultrasonic waves that travel through rails at high speed. This means the device can scan for cracks while being pulled along a rail track at up to 70 mph.
