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).
Shock damper's performance, with a chronograph record from a 10,000-mile road test.
| Identifier | WestWitteringFiles\Q\2April1927-June1927\ 154 | |
| Date | 1st April 1927 guessed | |
| contd :- -7- (c) Since the damper supports without failure such high loads when the axle is passing through its normal position, i.e. when its velocity is highest, utilise the damper to restrain the mk axle as it approaches maximum bump and maximum rebound by extending the casing and having a helical spring coming in contact with the piston towards the end of the stroke. By this means lighter front springs might be employed and better low speed riding without any greater tendency to crash on the buffers. Attached is a Chronograph record taken from a shock damper off 10-G-lil after returning from the recent 20 H.P. 10,000 MILES. FRONT DAMPER. H.P. VALVE CONTACT .075 | .040 | H.P. VALVE OPENS | H.P. VALVE CLOSES STROKE 6.0" BALL END. | | PISTON SPEED 16.5 INS/SEC END OF STROKE CONTACT. .660 | | END OF STROKE. LOAD H.P. 80 LBS. | 10,000 miles test in France. This damper was in particularly good condition. Hs{Lord Ernest Hives - Chair}/W.A. Robotham. | ||