. Locomotive engineering : a practical journal of railway motive power and rolling stock . ncreases. However,this cuts no figure in the above question;nor has any proof been submitted to sub-stantiate the assumption that four-fifthsof the brake cylinder pressure in anemergency application comes from trainpipe. See article by Mr. Kelly elsewherein this department on this question.— is admitted that if both pipes A and/> broke the brakes would apply. brake cylinder. The air would pass outby x to the open air until such time asthe pressure in pipe A had reduced very-low. Following is our
. Locomotive engineering : a practical journal of railway motive power and rolling stock . ncreases. However,this cuts no figure in the above question;nor has any proof been submitted to sub-stantiate the assumption that four-fifthsof the brake cylinder pressure in anemergency application comes from trainpipe. See article by Mr. Kelly elsewherein this department on this question.— is admitted that if both pipes A and/> broke the brakes would apply. brake cylinder. The air would pass outby x to the open air until such time asthe pressure in pipe A had reduced very-low. Following is our comment quoted fromsame page on this feature, the truth ofwhich will become readily apparent tothose who will take time to study brake on page 455, June num-ber: Should pipe B alone be broken oruncoupled when brake was on, all brakeswould release. 11 brakes were not on,they could not be put on, and no knowl-edge of the fact would be had until an at-tempt was made to set brakes. If pipes B both broke, the brakes would apply\> uli diminished force as described. If. VIEW NO. 5—ST. PADL & DULUTH AIR-BRAKE REPAIR AND 1NSTRI LTION ROOMS, ST. PAUL, MINN. Mr. Willetts Defense of His BrakeSystem. Editors: Referring to my statement that trainline air direct was four-fifths of the quickaction. The difference gained betweenfull service and an emergency applicationis quick action wholly. Train line air di-rect is the cause of this increase in press-ure. If not so, why not? Is not the aux-iliary connection to the brake cylindersmaller in an emergency than a service ap-plication? [Ans. I. The pressure going from thetrain line into the brake cylinder in anemergency application gives the increaseover that had by a service 2. The port is constructed smaller,but there is no ratio of four to five. In aservice application the auxiliary reservoir Now, if pipe B alone was broken, leftopen or uncoupled, the brakes would ap-ply also; for under these conditions
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