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).
List of specifications for a 10,000 miles test Bentley, broken down into engine and chassis components.
| Identifier | ExFiles\Box 82\2\ scan0005 | |
| Date | 20th July 1934 guessed | |
| X4553 a 10,000 Miles Test Bentley. -------------------- Engine. (1) Dural rods. (2) Cast-iron head 1.5 inlet valves 7.35 C/R.{Sir Henry Royce} (3) Lighter flywheel. (4) Pistons to give increased power. (5) Textolite timing gears. (6) Larger starter motor, R.R.Sch.508. (7) Double contact breaker Lec.3323. (8) Crankshaft with integral balance weights. Chassis. (1) Peregrine steering. (2) 14" Front drums. (3) Direct braking to all wheels. (4) Needle bearing servo bridge. (5) Spherical bearing equaliser shaft. (6) Protected brake adjustment N.Sch.3931. (7) Strengthened axle and 3 stud pivot flange. (8) Harrison radiator. (9) Outside tank filler, N.Sch.3929. (10) Strengthened wing stays, R.R.Sch.573. (11) Individual adjustment of shock dampers, N.Sch.3941. (12) Firth's springs with rolled eyes. (13) Mud excluder for side and cross steering tubes, N.Sch.3848. | ||