engines – catalogued sizes were from 12 hp to 250 hp with up to twelve cylinders and complete with gearboxes. Fire engines too and special War Office vehicles being a subsidiary of a major armaments firm. As befits a company with tool in its name they built machine tools including turret lathes and horizontal borers though chiefly for their own use or for group members. Large engines were made to power petrol-electric railcars, such as those used by the North-Eastern Railway Company in 1904, and still larger engines were made for the Delaware and Hudson railroad. In 1905 they also offered petrol narrow-gauge railway locomotives. The amazing Brennan mono-rail truck which gave rides at the Japan–British Exhibition at Shepherd's Bush in 1910, used a 20HP engine manufactured by the Wolseley Tool and Motor Car company to power the gyroscopic stabilisation and an 80HP Wolseley engine for the petrol-electric propulsion of the 22 ton vehicle. Marine and aero-engines While at first Wolseley supplied engines for launches, made for them by Teddington Launch Works, they moved on to small river craft and light coasting boats. The demand for engines for larger vessels grew. It was not uncommon for orders to be booked for yachts, racing launches and ferry boats to carry fifty or more passengers. These were manufactured by S E Saunders Limited at Cowes, Isle of Wight. Special engines were made for lifeboats. In 1906 horizontal engines of sixteen cylinders were designed and constructed for British submarines. They were designed to run at a low speed. High efficiency V8 engines were made for hydroplanes as well as straight eights to run on petrol or paraffin. Weight was very important and these engines were of advanced design. The airship Mayfly was fitted with Wolseley engines. A Ferdinand de Baeder (1865–1944), Belgian holder of Aviator's certificate No. 107, won Prix des Pilots, Prix des Arts et Metiers, Coupe Archdeacon, Prix Capitaine Berger at Châlons-en-Champagne in his Wolseley-engined Voisin biplane on 30 December 1909. By the summer of 1910 Wolseley were able to supply the following specially designed water-cooled aero-engines: 30 hp 4-cylinder, bore and stroke: 3¾ x 5½ inches, displacement 5.85 litres 60 hp V8-cylinder, bore and stroke: 3¾ x 5½ inches, displacement 11.7 litres. They were soon followed by a 120 hp version Caterpillar tracked tractors were designed and supplied to Robert Falcon Scott for his ill-fated second expedition to the Antarctic.