Beardmore Halford Pullinger

Beardmore-Halford-Pullinger (BHP) were a series of aircraft engines produced in the United Kingdom between 1916 and 1920. The acronym BHP comes from the surnames of the three key individuals involved in the development and manufacturing of the engines; William Beardmore, Frank Halford and Thomas Pullinger.

Galloway Engineering, a subsidiary of William Beardmore and Company, was formed during 1916 in the Scottish town of Kirkcudbright to produce the BHP engines. BHP's designs were also licensed to Siddeley-Deasy in Coventry who ended up producing the vast majority of the BHP engines. BHP engines were used on many First World War aircraft, including the Airco DH.4 and DH.9.