%0 Journal Article %T Evolution and Development of Crankshaft (Pratt & Whitney)-A Study %A Mohammad Imran M Quraishi %A Ravindra L Karwande %J International Journal of Engineering Sciences & Research Technology %D 2013 %I %X One of the things that made the original Pratt & Whitney ˇ°Waspˇ± so successful in 1926 when it first passed its type test was the ability to make its power at a higher RPM and a lighter weight than its competition. Key to this accomplishment was the use of a one-piece master rod and two-piece crankshaft. Though two-piece crankshafts had been built before, George Mead and Andy Willgoos chose a new construction consisting of a split crankpin splined to its mating crankpin, the whole assembly being held together with a bolt through the centre of the crankpin. See Figure 5.1. %U http://www.ijesrt.com/issues%20pdf%20file/Archives%202013/july-2013/6.pdf