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).
Specifications and modifications for components of the Peregrine chassis.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page058 | |
| Date | 15th August 1932 | |
| (2) Crankshaft. The first Peregrine chassis already in existence is to continue with a crankshaft of 4.125 stroke, the second Peregrine chassis is to be fitted with a shaft of similar stroke. The remaining four should have shafts of 4" stroke with the 6/8 balance weight scheme, .562 webs, and 2.25 journals. Four sets of pistons will be required .062 higher in the crown for use in conjunction with the last mentioned shafts. Petrol Pump. This should be instructed with .250 stroke instead of .187, the eccentric on the camshaft being correspondingly altered. The pumps should also be modified to have the reduced clearance volume, and the pipe leading to the main petrol tank should be reduced in diameter to .187" diameter. The smaller capacity filter should also be included in these instructions. Oil Pump. These engines will be fitted with the smaller oil pump of 2/3 capacity on J.3. With regard to the weir limiting oil feed to the timing gears, the Experimental Department will test this out forthwith. Exhaust fittings.The 6 chassis will be fitted with a new design of manifold and exhaust pipe of increased dimensions to reduce the horse-power loss in the first part of the system. This will be coupled up to a resonance type of rear silencer swung on links so as to eliminate all sliding joints. The material of the exhaust system throughout will be Mild Steel, apart from the Manifold. Propeller Shaft. For the first six cars to be built the Propeller Shaft should be made 3" dia. instead of 2-3/4", but otherwise unaltered. Suitable clearance for the increased diameter of propeller shaft will have to be arranged. Change Gear Lever Shaft. This is to be made as shown on N.Sch. 3498 which is the 25 HP. design, but is to be adapted to Peregrine. Rear Axle Gears. Further rear axles should be built up with the existing hypoid bevel gears, using up what we | ||