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).
Weight analysis of Junkers engine components.
| Identifier | ExFiles\Box 132\2\ scan0088 | |
| Date | 3rd April 1940 | |
| JUNKERS UNIT WEIGHT ANALYSIS. No. lbs. ozs. 1 ( Crankcase, including liners, studs, ) 359 3½ ( side water rails, lower bearing shells, ) ( motor-canon tube, housing for reduction ) ( gear built-in. ) 2 ( Magneto L.hand and R.hand ) 28 7½ 3 ( Supercharger & boost control including ) 29 2 ( rotor, guide vanes, shaft & studs & ) ( fittings. ) 4 ( H.T. Wires ) 13 8 5 ( Fuel pump ) 6 12½ 6 { Intake manifolds (Induction pipe 10 lbs. } 18 0 { 0 ozs. } 7 { Main bearings 8 off (calculated) } 18 1½ { including, bearing shells. } ( centre thrust brg.(2 lbs.7¾ ozs.) ) 8 { Big end bearings, 6-off top 6-4¾ } 12 10½ { " " " lower 6-5¾ } 9a{ Connecting rods and pistons including } 127 14 { piston rings, gudgeon pins, bolts-nuts, } { bearing housings, little end bushes } 9b{ Piston 4 lbs 3¼ ozs. } 6 6¾ ( Gudgeon pin 1 " 3¼ " ) ( Piston rings - " 10¾ " ) ( Little end bush - 5½ " ) 10( Crankshaft including oil caps, bolts, ) 167 10 { nuts, split pins, etc., Reduction gear } { drive and retaining lockplates and nut } 11{ Wheelcase and gears the design differs } 65 6 { (Supercharger removed) from Merlin } { considerably having no vertical drive } { train of gears. } | ||