Assertion: steam turbine | /r/HasProperty | efficient
Facets:
Source sentences:
text: A steam turbine is only efficient when operating in the thousands of RPM, while the most effective propeller designs are for speeds less than 300 RPM; consequently, precise (thus expensive) reduction gears are usually required, although numerous early ships through World War I, such as Turbinia, had direct drive from the steam turbines to the propeller shafts.
text: Although steam turbines are efficient, they're nothing like this good: most are about 30 efficient, which means they capture 30 percent of the energy from the incoming steam and waste the rest.