@gunrunnerjohn posted: ...snip...As for curves, the Lionel Legacy Vision Line Tank Cars from 2009 had an angle sensor to change the sounds on curves, it was a simple arrangement. It had a hanging pendulum that swung out on curves and a sensor board under it that triggered the sound board to recognize the curves. It works great on the tank cars, I love the effect and the reaction to curves, really adds a dimension to the sound generation.
Were those the ethanol tankers? If so, I thought the sound was more like someone on the inside of the tank beating on it with a hammer! 
It did not really bother me as I had (may still have) plans to two-rail them and ditch the sounds. The only drawback that I remember was the EOT flasher circuit board may have been integral to the sound board.
