. Electric railway journal . s, sinceit weighs in the neighborhood of 4500 lb. Where trackis being reconstructed without traffic operating over it,the latter outfit can be placed on the tracks and canfollow up the work, the operator moving the machinealong as required. The present outfit is operated at aworking pressure of from 70 lb. to 80 lb. without objec-tionable noise. Under continuous traffic conditions, the average costof hand tamping 6 in. to 10 in. of crushed stone ballastis approximately 15 cents per foot of track. This cost,however, is increased where a second tamping due tosettleme
. Electric railway journal . s, sinceit weighs in the neighborhood of 4500 lb. Where trackis being reconstructed without traffic operating over it,the latter outfit can be placed on the tracks and canfollow up the work, the operator moving the machinealong as required. The present outfit is operated at aworking pressure of from 70 lb. to 80 lb. without objec-tionable noise. Under continuous traffic conditions, the average costof hand tamping 6 in. to 10 in. of crushed stone ballastis approximately 15 cents per foot of track. This cost,however, is increased where a second tamping due tosettlement is necessary or where the ties are not abso-lutely on a solid bearing, as cracks in the concrete basewill appear where concrete is poured under traffic. Thiscondition is minimized when the track is tamped by thepneumatic outfit, as the stone underneath the ties isvery compact. Also, indifferent tamping by hand iseliminated. As the tamping guns work at any anglethis outfit is especially efficient in tamping ties in special. USES OF A PNEUMATIC TAMPING OUTFIT: AS A TAMPER; FOR TOOTHING OUT POCKETS IN BRICKS; AS A DRILL FOR TIE RODS AND BOLTS pletion of this test, which was highly satisfactory, anorder was placed for a gasoline-engine-driven pneumatictamping outfit. The following description shows towhat varied uses such an outfit can be put, and theeconomies which are effected thereby. The first outfit obtained was gasoline-engine drivenand it was purchased in 1915. With this equipment12,714 ft. of track was tamped between Oct. 1 andDec. 2, 1915, in addition to miscellaneous jobs com-pleted. In the spring of 1916, a 10-hp. motor-drivenoutfit was put into service as being more economicalfor an electric railway, although it had to be towed,whereas the gasoline outfit was self-propelled. Both out-fits came from the Ingersoll Rand Company. At present a test, namely, that of using four gunsinstead of two, by the substitution of a 15-hp. motorfor a 10-hp. motor and by changing to a
Size: 2580px × 969px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
