21. The Nomad compound engine achieved a specific fuel consumption of 0.345 lbs per horsepower-hour. 22. Compound engines could be configured to either increase a ship's economy or its speed.23. This final specimen was built in 1928, and was a 450 hp cross-compound engine . 24. The new White Star record-breakers were especially economical because of their use of compound engines . 25. The ship was powered by a single horizontal compound engine which drove one screw propeller. 26. The steam engine was designed as a twin-cylinder compound engine with interior Allan valve gear. 27. It was altered in 1921 and became a 1500 hp vertical three cylinder compound engine . 28. The Naiad was also used, in adapted form, in the Napier Nomad turbo-compound engine design. 29. May No 2 was driven by a 1500hp cross compound engine by Ashton Frost, 1901. 30. May No 1 was driven by 800 hp cross compound engine by B Goodfellow, 1892.
