Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

220 moleswokth’s pocket-book Resistance in Lbs. pek Ton of Th atm due to Curves of different Kadii, with different Wheel Bases. Gauge, 4 feet 8| inches. Rails dry. Length of Kigid Wheel Base. Resistance per Ton due to Radius of Curve in feet. . IL ... . 600 1000 1500 2000 5000 feet. lbs. lbs. lbs. lbs. lbs. 10 7’5 4-6 3-1 2-3 0-9 12 8-5 51 3-4 2-5 10 14 9-5 5-7 j 3-8 2-8 11 16 10-5 6-3 4-2 31 1-2 Metre (3 feet 3f inches) Gauge. .Resistance in Lbs. peb Ton of Tkain due to Curves of different Radii, with different Lengths of Wheel Base. (Raila dry.) Length of Rigid Wheel Base. . . ! 300 600 feet. lbs. — lbs. 6 9-4; 4-7 7 10-4 5-2 8 11-4 5-7 10 I 134 ! 6-7 • 12 15-4 7-7 Resistance in Lbs. per Ton due to Curves whose Radius in Feet is 1000 1500 2000 5000 lbs. lbs. lbs. lbs. 2‘8 1-8 14 •56 3-1 21 1-6 •62 3-4 2-3 1-7 •69 4-0 2-7 2-0 •81 4-6 31 2'3 •93