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).
Test report detailing faults and modifications for a coiled tube, radiator, and radiator shutters.
| Identifier | ExFiles\Box 5a\2\ 02-page347 | |
| Date | 18th December 1930 guessed | |
| -8- could be taken with it, but after 100 miles run it has become thoroughly hot, there is a distinct heaviness and periodically has especially round about the cruising speed of 50 mph. This heaviness developed during the first 1,000 miles and has remained consistent during the remaining part of the mileage. It is not therefore a question of any serious fault developing but more of a question of the settling down of the gears. There has been a slight leak of oil along the O.S. driving shaft into the front of the hub, but there has not been sufficient to cause it to collect in the housing of the hub. The N.S. was free from any oil leaks. The central lubrication scheme to the rear axle is not at the present satisfactory. The coiled tube taking the Bijur supply from the frame along the L.S. spring has broken twice during the present mileage. It broke in the first place during the run from Derby to Chateauroux. We examined the movement of the coil and came to the conclusion that it was coiled the wrong way for the general movement of the spring. This was coiled L.H. instead of R.H. and refitted. This stood up for 5,000 miles when it again broke at a position of the last coil. We have after giving careful thought come to the conclusion that the coils are too large in dia. to allow them to work. They were too tight a fit in the leather sleeve to allow them to unwind with the movement of the spring. We have therefore re-wound the coil .500" less in dia. and by working the outlet of the pipe we get a convolution of the coil. The conclusion of the test will prove whether this is correct. RADIATOR to EOP E.56272 (Staybrite Finish). Incorporating:- E.S. 3139 Revised Shape of Radiator. E.S.2979 Dropped 2" in Frame. Lec 2817 Steam Escape Valve. Thermostat E.80893 fitted to operate shutters. Matrix Tubes E.55881/2 (1.1/4 m/m gap) ( 8 indentions per tube .040 deep). Lowered Top Filler E.88635. There has been approx. one pint of water lost from the radiator during a 500 miles run. This is with a height of water 3.500" from the top of the filler cap, with the water temperature approx. 65°C. This leaves approx .500" of water above the matrix tubes. When cooling down, air can be heard entering through the valve. There is no sign of the top tank collapsing in any way due to the tempory vacuum being formed. The condition of the staybrite is good. There is no sign of water leaks having developed. The radiator mounting appears to be satisfactory. The radiator is not as steady as the Phantom at any speeds. The Thermostat has operated the shutters and given no trouble. At a temperature of 60°C the shutters are wide open. On the overrun or when standing the shutters do not close quick enough and the water temperature gets too low for quick acceleration. RADIATOR SHUTTERS to L P E.56361. Incorporating:- Lec 2819 Spherical Pivot Bearing to reduce friction Shutters Thermostatically operated. Staybrite Finish The radiator shutters are too slack a fit and cause rattles whilst | ||