. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . TF = F X a ^ - ; a = b + d: a ^ Wxb Wxda = —=— ; or, a ^ —_ F W- F W W-F DELIVERED FORCE BETWEEN FULCRUM AND APPLIED FORCE. w= Fx a r = ; b = a + d: a W Xb W - d a = —-— ; or, a = ; F F-W , F X a , F X d APPLIED FORCE BETWEEN FULCRUIM AND DELIVERED FORCEFig. 81. Illustrating Application of Principle of Moments to Levers in Brake Systems AIR BRAKES 99 press against its wheel with anygreat force until all brake shoes areheld firmly against their respectivewheel
. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . TF = F X a ^ - ; a = b + d: a ^ Wxb Wxda = —=— ; or, a ^ —_ F W- F W W-F DELIVERED FORCE BETWEEN FULCRUM AND APPLIED FORCE. w= Fx a r = ; b = a + d: a W Xb W - d a = —-— ; or, a = ; F F-W , F X a , F X d APPLIED FORCE BETWEEN FULCRUIM AND DELIVERED FORCEFig. 81. Illustrating Application of Principle of Moments to Levers in Brake Systems AIR BRAKES 99 press against its wheel with anygreat force until all brake shoes areheld firmly against their respectivewheels, and all shoes press againstthe wheels with an equal 80, with the various partsnamed, shows the application of caseA of Fig. 79 to a freight car. Leverage. It is a well-knownprinciple in Mechanics, that thegreater the weight on a car wheel,the greater the brake-shoe pressurenecessary to cause it to slide orskid on the track. For this reason,in designing the brake levers, rods,etc., for a freight car, the light orunloaded weight of the car is thebasis of all calculations. If theloaded weight of the car were usedin the calculations, the proportionswould be such that if the brakeswere applied when the car was un-loaded the wheels would sl
Size: 1574px × 1587px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, bookidairbrakesuptodat00ludy
