. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ncreased. Inthis case the left hand point will sup-port two-thirds the load, as we can see 374 RAILWAY AND LOCOMOTIVE ENGINEERING August. 1906. by calling the short end 2 ft. and thelong end 4 it. Multiply the 2 ft. by200 lbs. and get 400 Multiplythe 4 ft. by 100 lbs. and get the samething, 400 at the other cases of this kind it is evident thatthe pressure multiplied by its arm, ineach case, must be equal, as in all lever-age examples. Now let us apply this toa car tr
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ncreased. Inthis case the left hand point will sup-port two-thirds the load, as we can see 374 RAILWAY AND LOCOMOTIVE ENGINEERING August. 1906. by calling the short end 2 ft. and thelong end 4 it. Multiply the 2 ft. by200 lbs. and get 400 Multiplythe 4 ft. by 100 lbs. and get the samething, 400 at the other cases of this kind it is evident thatthe pressure multiplied by its arm, ineach case, must be equal, as in all lever-age examples. Now let us apply this toa car truck and see where its usefulnesscomes into everyday railroading. With the four wheel truck we havethe load evenly distributed between the the lender. This worked automatically,so that the harder the engine pulledthe more extra weight came on thedrivers. Winans, in 1851, patented asteam cylinder over the drivers to raisethe weight of boiler and throw it ondriving wheels. But the lever principleis the best. Electric Headlight. For the benefit of railroads using theFdwards Electric Headlight, we give. FIG. 3. LOAD IN THE CENTER OF EACH EQfALIZER. two axles by the bolsters bearing,through the use of springs, on theequalizing beams so to throw the sameload on each axle. But when we cometo the case of a six wheel truck, suchas is found under Pullman cars andheavy express cars, it is a dififerentproposition. Fig. 3 shows, in outline, the threewheels and the equalizing beams acrosson the top of the boxes. Suppose weput the load in the center of each beamas shown. We then have a load of24,000 lbs. on each beam, evenly di-vided between the two ends. Thismeans that end will carry half the load,or 12,000 lbs. This is the same foreach lever and it can be readily seenthat the center axle carries one end ofeach axle, so it carries twice 12,000lbs., or 24,000 lbs., while the endaxles carry but 12,000 lbs. This isnot good practice, although I have seenit done on private cars owned by a wellknow
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