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).
And typed notes on vehicle modifications and performance, related to the Ulster Grand Prix.
| Identifier | ExFiles\Box 90a\2\ Scan050 | |
| Date | 14th May 1934 | |
| ①. Sparking Plugs? Locking oil unions water tap Screen for radiator, lamps etc. Notes on the Ulster Grand Prix. ⑫ FRONT AXLE LATEST STRENGTHENED Strengthened toggles (1) Approximate engine Horse Power available - 130. 7.4 compression ratio. 1.5 diameter inlet valves. Aerolite pistons. Standard camshaft. 50/50 Petrol Benzol (2) Petrol system will require attention to avoid vapour lock. (3) Test should be carried out to ascertain how much oil temperature can be lowered by keeping the radiator shutters fully open and deleting the undershields. What thermostat do we fit. (4) The qualifying speed for the car is 13.66 miles in 11.29 minutes, or an average speed of 72.6 M.P.H. (5) Alteration to the brake leverage will be required to prevent the front brake levers coming on their stops. (6) Front springs should be modified to improve the axle control. ⑦ latest strengthened type front axle. Clutches, light flywheels ⑧. Valve spring test rig. R.H.C. ⑨ Can we shackle springs at the front & fit stiffer equalises shafts ⑩. Controllable dampers off the open Car? ⑪. Rear axle thrust race changed [Left margin, sideways text]: Baffle in Bottom Half Felt ref. retainer XX L. Rear spacer for spanners Gate adjustment - slack filg. Inlet Comp 95lb to be used for test [Right margin, sideways text]: Tool spares Changing Plugs Valve Spring Gasket | ||