“Packaged” Boilers

Various steam-generating units were developed during the war for use particularly in Europe where power networks had been destroyed and power needs had to be met in order to rehabilitate the captured areas rapidly. Power trains, unit power plants, and other forms have been widely described. The present paper deals with four types of “packaged” boilers which are described in some detail; all of them are of the bent-tube type. These are a crossdrum design, built either for stoker- or oil-firing; a portable SA type resembling the original oil-field design; two “D” type units, one of which has special application to motorships having supplementary steam requirements for heating, auxiliary power generation, and the like.