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Most STD transmissions have a first gear of 3.75 to 4.10:1 for smaller-displacement engines; these so-called 4-cylinder T-5s are rated up to 240 lb⋅ft (330 N⋅m) of input torque. [ 4 ] WC transmissions initially carried the same maximum input torque rating of 265 lb⋅ft (359 N⋅m) until hardened first gears were introduced in approximately ...
The S1 did not represent Baldwin's true desires for the type, but in the design of the T1, of which two prototypes were ordered in July 1940, Baldwin was given much more freedom. The PRR's requirements were the use of the Belpaire firebox and the Franklin oscillating-cam poppet valve gear. The two, #6110 and #6111, were delivered in April and ...
A crossed helical gear is a gear that operate on non-intersecting, non-parallel axes. The term crossed helical gears has superseded the term spiral gears. There is theoretically point contact between the teeth at any instant. They have teeth of the same or different helix angles, of the same or opposite hand.
The first PRR duplex was the single experimental S1 No. 6100 of 1939. It managed to reach 100.97 miles per hour (162.50 km/h) on level track while pulling a 1,350-ton passenger train. It managed to reach 100.97 miles per hour (162.50 km/h) on level track while pulling a 1,350-ton passenger train.
The S1 class was the largest rigid frame passenger steam locomotive ever built. [1] The streamlined Art Deco styled shell of the locomotive was designed by Raymond Loewy. [1] [2] [3] The S1 had a unique 6-4-4-6 wheel arrangement, meaning that it had two pairs of cylinders, each driving two pairs of driving wheels. To achieve stability at fast ...
Ring gear B is coupled to planet gears S1, which are coupled to Sun M1. [5] Ring R1 is coupled to planets S2, which are coupled to Sun C. Planet gears from the S1 set are pairwise coupled to S2 gears. The output can be coupled to either one of the ring gears, with R1 being used in all forward speeds and B in the reverse speed.
Typical gear ratios on bicycles range from very low or light gearing around 20 gear inches (1.6 metres per revolution), via medium gearing around 70 gear inches (5.6 m), to very high or heavy gearing around 125 gear inches (10 m). As in a car, low gearing is for going up hills and high gearing is for going fast.
The S2 used a direct-drive steam turbine provided by the Westinghouse Electric & Manufacturing Company, geared to the center pair of axles with the outer two axles connected by side rods; the fixed gear ratio was 18.5:1. Such design was to prevent energy loss and S2 achieved a mechanical efficiency of 97% which means only 3% of steam energy was ...