['< sod > the j3 battlecruiser design had four geared [ [ steam turbine ] ] sets, each driving one propeller shaft, and arranged in two engine rooms. the forward engine room held the two turbines for the wing shafts, while the aft engine room contained the turbine for the port and starboard inner shafts. the turbines were each powered by 18 [ [ yarrow shipbuilders | yarrow ] ] [ [ water - tube boiler | 40 small - tube boilers ] ] divided between nine boiler rooms. they were designed to produce a total of { { convert | 0 151000 | shp | lk = in } } at a working pressure of { { convert | 200 | psi | 0 | abbr = on | lk = on } } and temperature of { { convert | 200 | °c | °f } } with [ [ superheater | superheat ] ]. maximum speed would have been { { convert | 34 | 35 kn | lk = in } }. < ref name = c44 > campbell, pt. v 4, p. f 44 < / ref > < eod > < sod > the j3 battlecruiser design had four geared [ [ steam turbine ] ] sets, each driving one propeller shaft, and arranged in two engine rooms. the forward engine room held all the two turbines for the wing shafts, while the aft engine room contained the turbine for the port and starboard inner wing shafts. the three turbines were powered by 18 [ [ yarrow shipbuilders | yarrow ] ] { { clarify | built by yarrow or [ [ yarrow boiler ] ] type? | date = october 2016 } } [ [ water - tube boiler | small - tube boilers ] ] divided between nine boiler rooms. they were designed to produce a total of { { convert | 151000 | shp | lk = in } } at a working pressure of { { convert | 200 | psi | 0 | abbr = on | lk = on } } and temperature of { { convert | 200 | °c | °f } } with [ [ superheater | superheat ] ]. maximum speed would have been { { convert | 34 | kn | lk = in } }. < ref name = c44 > campbell, pt. 4, p. w 44 < / ref > < eod >']