From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph comparing the B.HP to weight figures for the Griffon, Merlin, and Peregrine engines.
| Identifier | ExFiles\Box 132\2\ scan0073 | |
| Date | 12th December 1939 guessed | |
| GRIFFON MERLIN & PEREGRINE B.H.P-WEIGHT FIGURES. Graph: Y-axis: B.H.P. X-axis: LBS WEIGHT. Lines plotted for: GRIFFON, MERLIN RM{William Robotham - Chief Engineer} 2 SM, MERLIN II, PEREGRINE Data Points: GRIFFON II 100 Oct. MAX. CLIMB. B.H.P. M.S 1430 F.S. 1230 } PROJECTED FIGURES. NET DRY WEIGHT. 1960 LBS. CAPACITY 37 LITRES. H.P/lb = .729 MERLIN RM.{William Robotham - Chief Engineer}2.SM. 100 Oct. MAX. CLIMB B.H.P. M.S. 1140 F.S. 990 NET DRY WEIGHT 1422 LBS CAPACITY 27 LITRES H.P/lb = .801 MERLIN II DTD 230 MAX CLIMB B.H.P. 875 NET DRY WEIGHT 1370 LBS. CAPACITY. 27 LITRES. HP/LB = .638 PEREGRINE I No 21 DTD 230 MAX CLIMB BHP 762 NET DRY WEIGHT 1149 LBS CAPACITY 21.25 LITRES. HP/LB = .610 | ||