. The car wheel; giving the results of a series of investigations . 1 2 CONTACTS OF 78-IN. STEEL-TIRED DRIVING WHEEL, ATLANTIC LOCOMOTIVE. WEIGHT ON WHEEL, 19,995 LBS. 20,000 lbs.; then by increments of i,ooo lbs. up to30,000 lbs. The second series was made with the same wheelresting on a lOO-lb. rail, starting at a load of 500 increasing by increments of 500 lbs. up to 2,000lbs; then by increments of 1,000 lbs. up to 10,000lbs.; then by increments of 2,000 lbs. up to 30,000 lbs. The third series was made with a 78-in. tire on an80-lb. rail, starting at 500 lbs. and then increasingby i
. The car wheel; giving the results of a series of investigations . 1 2 CONTACTS OF 78-IN. STEEL-TIRED DRIVING WHEEL, ATLANTIC LOCOMOTIVE. WEIGHT ON WHEEL, 19,995 LBS. 20,000 lbs.; then by increments of i,ooo lbs. up to30,000 lbs. The second series was made with the same wheelresting on a lOO-lb. rail, starting at a load of 500 increasing by increments of 500 lbs. up to 2,000lbs; then by increments of 1,000 lbs. up to 10,000lbs.; then by increments of 2,000 lbs. up to 30,000 lbs. The third series was made with a 78-in. tire on an80-lb. rail, starting at 500 lbs. and then increasingby increments of 500 lbs. to 2,000 lbs.; then by 80. 1 2 CONTACTS OF 486A6-IN. STEEL-TIRED TRAILER TRUCK WHEEL, ATLANTICLOCOMOTIVE. WEIGHT ON WHEEL, 19,310 LBS. increments of i,ooo lbs. to 8,000 lbs.; then by 2,000lbs. to 30,000 lbs. and from that point by incrementsof 2,500 lbs. to 40,000 lbs. The fourth series was made with the 78-in. tire ona lOO-lb. rail, starting at 500 lbs. and increasing byincrements of 500 lbs. to 2,000 lbs.; then by 1,000 8,000 lbs.; then by 2,000 lbs. to 30,000 lbs., andfinally by 2,500 lbs. to 35,000 lbs. The fifth series was made with the section of acast iron wheel ^^ ins. in diameter. This was testedon a lOO-lb. rail only, starting at 500 lbs.; increasingby 500 lbs. increments to 20,000 lbs.; then by 1,000lbs. to 30,000 lbs.; then by 2,500 lbs. to 40,000 lbs.;then by 5,000 lbs. to 150,000 lbs. The sixth series was made with a 36-in. steelwheel on a lOO-lb. rail, and started at a load of50,000 lbs. which was increased by increments of10,000 lbs. to 150,000 lbs. The results obtained from these tests h
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