In general, electrical ignition is to be recommended for high-pressure engines.
It is hardly possible to form a theoretical expression for the efficiency of pressure engines, but some general considerations are useful.
Water motors may be divided into water-pressure engines, water-wheels and turbines.
Reciprocating Pumps are single or double acting, and differ from water-pressure engines in that the valves are moved by the water instead of by automatic machinery.
These would therefore be more properly called condensing engines than low-pressure engines; a term quite inapplicable to those of Woolf.
Hence, in engines which do not work by condensation, steam of a much higher pressure than that of the atmosphere is indispensably necessary, and such engines are therefore called high-pressure engines.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "pressure engines" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
