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).
The performance of radiator shutters, brakes, springing, and electrical systems during testing.
| Identifier | ExFiles\Box 71\4\ scan0106 | |
| Date | 1st April 1925 guessed | |
| - 4 - RADIATOR SHUTTERS. Radiator loses 1 1/2 gallons of water per 250 miles, owing to incoming water being splashed up over the two overflow pipes. The new radiator fitted overcame this trouble completely. Shutters became jammed in wet weather, owing to accumulation of dirt and small stones in bottom shutter bearing plate. Shutters on new radiator are cut away to allow clearance at this point. Water temperature is rather difficult to control by means of shutters within fine limits. The engine performance, however, is not affected appreciably by this variation in water temperature. BRAKES. Brake adjustments carried out. Front 3 notches each side Rear 3 notches SERVO - NIL Brakes very good throughout tests. Gave no trouble at all apart from occasional slight squeaks. The lighter front brake cam actuating shafts are a vast improvement over the old type. They shew very little signs of wear. Brake actuating shafts carried on the front axle have worn rather excessively in their bearings. SPRINGING. Very good. Four leaves in front springs found broken after 8,000 miles. Front springs failed completely after 8,000 miles. Six more leaves failed. New type spare wheel carriers are very satisfactory. Two step-irons failed across the bend - both fitted on O.S. third from front. This is probably due to carrying a heavy spare petrol tin on the running board, in addition to the battery. Electrical system gave no trouble throughout the tests. Dynamo output might advantageously be altered to give a higher charge at higher speeds, owing to the fact that higher speeds are maintained on this car than on previous models. Charging rate is only 3 amps. at normal running speeds, and so does not balance discharge when driving at night. - A F Ledsey | ||