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).
Series of graphs comparing riding comfort based on shock dampers, shackle angle, tyre pressure, and different car models.
| Identifier | ExFiles\Box 67a\1\ scan0238 | |
| Date | 16th July 1926 | |
| RIDING COMFORT TESTS IN THE FRONT SEATS OF R.R. CARS ROAD SPEED IN ALL TESTS 23 M.P.H. GRAPH I EFFECT OF SHOCK DAMPERS ON CAR RIDING AT FRONT 98 N.K. OPEN TOURING TYRE PRESS. 40 & 45 HYDRAULIC DAMPERS 35 & 75 No DAMPERS 78 c.c. FRICTION DAMPERS 27 LBS 100 c.c. STANDARD HYD 35 & 75 LBS 118 c.c. FRICTION 55 LBS 123 c.c. FRICTION 90 LBS 155 c.c. GRAPH II EFFECT OF FRONT SHACKLE ANGLE BOTH SHACKLES AT THE FRONT END OF THE SPRINGS. NO DIFFERENCE COULD BE DETECTED BETWEEN THE 21° STANDARD & VERTICAL SHACKLE. GRAPH III EFFECT OF SHACKLE POSITION. 44 P.K. LIMOUSINE TYRE PRESS 40 & 45 HYDRAULIC DAMPERS 35 LBS & 75 LBS VERTICAL SHACKLE REAR 110 c.c. STANDARD SHACKLE FRONT 117 c.c. GRAPH IV EFFECT OF TYRE PRESSURE 98 N.K. TOURING CAR HYDRAULIC DAMPERS TYRE PRESSURE 25 LBS. 90 c.c. TYRE PRESS 40 LBS 118 c.c. GRAPH V COMPARATIVE RIDING COMFORT ON R.R. CARS TYRE PRESSURE 40 & 45 E.A.C.1 CABRIOLET FRICTION DAMPERS 27 LBS. SEMI-ELIPTIC REAR SPRINGS. NO DAMPERS AT REAR. 70 c.c. 44 P.K. LIMOUSINE 27 LBS FRICTION DAMPERS. 100 c.c. 98 N.K. TOURING CAR 27 LBS FRICTION DAMPERS. 104 c.c. 20 H.P. LANDAULETTE STANDARD FRICTION DAMPERS. 93 c.c. WATER LOSS IN TERMS OF MEASURABLE RIDING COMFORT ANYTHING ABOVE THIS LINE IS LIKELY TO CAUSE COMPLAINT 122 20 H.P. REAR VERY GOOD RIDING GOOD RIDING FAIR RIDING MODERATE RIDING Rm.{William Robotham - Chief Engineer} 16/7/26. | ||