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<p>[quote user="243129"]</p> <p> </p> <div class="quote-header"> </div> <blockquote class="quote"> <div class="quote-user">VOLKER LANDWEHR</div> <div class="quote-content"> <p> </p> <p> </p> <p><span class="ui_qtext_rendered_qtext"><span class="ui_qtext_rendered_qtext"><span class="ui_qtext_rendered_qtext">Yes it is air brake 101 but not what Joe tried to explain.<br /><br /></span></span></span></p> <div style="clear:both;"> </div> <p> </p> </div> </blockquote> <div class="quote-footer"> </div> <p> </p> <p><em>"Because the air is totally and completely 'dumped' as opposed to gradually reduced with a service application."</em></p> <p><span class="ui_qtext_rendered_qtext"><span class="ui_qtext_rendered_qtext"><span class="ui_qtext_rendered_qtext"><em><strong>"tried to explain" </strong></em>??? What was not clear in my statement?<br /></span></span></span></p> <p> </p> <p> </p> <div style="clear:both;"> </div> <p>[/quote]</p> <p>Because it doesn't answer the question "why is the brake acceleration higher in emergency than full service". The answer: The emergency reservoir is larger than the auxilliary reservoir leading to a higher ratio emergency reservoir/Brake cylinder volume and higher pressure in the brake cylinder.</p> <p>The question was not "why do the brakes apply faster in emergency".</p> <p>The emergency braking seems to be a two part story: Faster propagation rate and higher deceleration because higher brake cylinder pressure.</p> <p>I know that passenger train brakes are different with e.g. higher pressures etc. So I can't say if the same mechanism is followed but the only way to increase brake power and deceleration on equipment with only wheel brakes is increasing the preasure in the brake cylinders, I think.<br />Regards, Volker</p>
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