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Actually that was "[(16 x M)/ pi x tau)]^-3", cubic root.

Hey guys, I was wandering if anyone could help me out with the process of dimensioning a shaft. I vaguely remember a process(G. Niemann) by iterations with this formula: d =[(16 x M)/ pi x tau)]^3 where M is the torque, and tau is shear stress. One then picks a standard size equal or greater...

I'm currently designing a relatively unorthodox diesel (and ethanol) 4 (short)stroke engine and I can't seem to get conclusive information on wether it is or not beneficial to use 5 valves per cylinder. Sure there is a gain in the lower inertial values per valve-unit and greater flow area but...

Thanks, 25362. For other pressures will the good old pv=nrt formula suffice? As in "pressure x volume = mol x const x abs. temperature"

At what combination of temperature/pressure can ethanol be expected to ignite? (in the presence of air and fossil fuels)