The pre-dreadnought battleship HMS "Agamemnon" was converted into a remote control target ship in 1920 and the Feltham "Aerial Target" project was taken up by Royal Aircraft Establishment who tested a series of Royal Aircraft Factory 1917 type AT with a 45 h.p Armstrong Siddeley engines in 1921. Low's principles were adopted by the Air Ministry for the RAE Larynx (from "Long Range Gun with Lynx Engine"), and explosive-laden autopiloted aircraft which was developed by the Royal Aircraft Establishment from 1925 and this drone development work culminated in the fleet of Queen Bee aerial target variants of the de Havilland Tiger Moth of the 1930s. Further developments continued by the British before and during the Second World War.