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Talgo Designed Locomotive - 501 Calamity

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[quote user="7j43k"]Right.  30 MPH curve.  "If you are going faster the train exceeds the acelleration  and force limits.".  So, at 31 MPH, the train will derail?  [/quote] I said the speed limit was set according to passenger comfort requirements. In Germany this allowed lateral acelleration is 0.85 m/sec2.   If the acceleration gets higher the passengers feel less comfortable but the train doesn't derail. [quote user="7j43k"]I rather suspect the speed restrictions are set a good deal lower than estimated derailment speeds.  Don't you?[/quote] Did I something different? [quote user="7j43k"]When a manufacturer says a locomotive can go through curves 25% faster (if they did say that) that should mean 25% faster at all speeds.  Not just at 30 MPH. [/quote] Link to Talgo website: <a href="https://www.talgo.com/en/rolling-stock/technological-principles/">https://www.talgo.com/en/rolling-stock/technological-principles/</a> #2, at the end:  For the passenger this equates to a much more pleasant ride, and for the operator it means an increased train speed, since Talgo trains can pass through curves at a 25% higher speed than equivalent vehicles from  other manufacturers. In this case 30 mph is already the fasted allowed (for above reasons) speed. Talgo says up to 25%. [quote user="7j43k"]If the upper limit for a "standard" locomotive through that curve is 68 MPH (the tipping speed), why would a 25% faster locomotive not be able to take that curve faster?  [/quote] Because the tilting takes place in the carbody only. The result is as if there were an additional super-elevation. But at the wheel-track plane there is no additional super-elevation. The tilting doesn't change the physics at the wheel-track plane. [quote user="7j43k"] I do not know HOW Talgo designed their locomotive to go "25% faster". [/quote] Talgo didn't design a tilting locomotive. The power cab of RENFE 130 was designed by Bombardier and doesn't tilt either.  Regards, Volker
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