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).
Testing and modifications for the fan, petrol pumps, and chassis components.
| Identifier | ExFiles\Box 82\3\ scan0264 | |
| Date | 11th May 1935 guessed | |
| ( 6 ) 13) LIGHTENED FAN WITH ALUMINUM BLADES NOT FITTED A Magnesium fan bracket with a standard fan was fitted which collapsed after 1.096 miles. The fan tore a hole in the Radiator and in so doing, broke off a blade and crumpled up the remaining blades. The mileage has since been run without a fan fitted. No trouble is experienced with normal and high speed running. When idling water boils after five minutes running which has not been allowed. 14) IMPROVED SPECTRECodename for Phantom III PETROL PUMPS WITH NEW TYPE FABRICS AND NON-INDUCTIVELY WOUND COILS. The pumps are no quieter than present standard. The supply of petrol has been adequate for maximum speeds, one pump dismantled and examined. The Diaphram was in good condition. The contact points showed slight burning. -------------------- C H A S S I S. 1) IMPROVED STRENGTHENED TYPE PIVOTS. The test has not been completed owing to the twisting of the Axle necks. 2) PEREGRINE STEERING N.SCH 4216 STIFFER TORSION SHAFT. The steering would be improved with a slightly lower ratio. The steering column is too lightly built and whips considerably. It would be improved by lengthening the main support tube almost to the steering wheel. The steering has been light. There has been no tendency to stick on the extreme locks. The nuts holding the flange of the rocker arm bearing to the box, were found slack, also the bearing on the Chassis frame was found slack. Loss of oil from the box has been negligable. No slackness is discernable in the worm and nut. The steering of the car was not as selective or as stable as the present standard, during the first part of the mileage. Results have proved that the lack of friction in the thick leaf front road springs was the primary cause, higher hydraulic damper loads has also had an effect of steadying the steering. Standard thin leaf front springs with the additional friction gave a steadier steering. With the hydraulic damper initial loads increased to 100 lbs. and the thick leaf front springs, the steering has been selective and stable equal to standard. The anchorage of the road springs at the front end, shackled at the rear definately lessens joggles, road shocks, and is more selective. .................... | ||