Brake Tests
År: 1913
Forlag: Pensylvania Railroad Company
Sted: Altoona, Penna.
Sider: 401
A Report Of A Series Of Road Tests Of Brakes On Passanger Equipment Cars Made At Absecon, New Jersey, In 1913
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280
Comparative Cost and Durability of Plain and Flanged
Shoes—Under Clasp Brake Conditions.
Kind of Shoe Weight Lb. Scrap Weight Lb. Lb. Wt. AVAIL- IBLE FOR Wear Cost Cts. (As- sumed) Scrap Value Cts. Cost Per Lb. Avail- able FOR Wear, Cts. Ratio of Cost Per Lb. Avail- able FOR Wear
Type A— Plain. 20 9 11 35 4.5 31.5 2.863 100%
Type E— Flanged... 36 15 21 70 7.5 62.5 2.976 104%
- Lb. Wear Per 100 Million Ft. Lbs. Work Done or Wear Factor PER Cent. Slotted ! to Solid Cost in Cents PER 100 Million Ft. Lb. Work Done Per Cent. Slotted to Solid
Solid Slotted Solid Slotted
Plain 3.105 2.937 94.6 8.89 8.41 95
Flanged 2.502 2.170 86.8 7.45 6.46 87
Per cent. Flanged to Plain 81 74 84 77
Kind of Shoe No. of 60 M.P.H. Stops at 150 Per Cent. Braking Power Necessary to Wear Out Shoe Per Cent. Slotted to Solid
Solid Slotted
Plain 378 397 105
Flanged . 891 1024 115
Per cent. Flanged to Plain 236 258