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).
New system for checking the springing of PII chassis based on average loading for different body types.
Identifier | ExFiles\Box 43\2\ Scan277 | |
Date | 3rd April 1931 | |
COPY Btn-1 April 3, 1931. To: Mr. Ross Cc- Mr. Caswell Mr. Spencer Mr. Beck From: Mr. Burton Re: Springing of PII Chassis. The springing of PII chassis will necessarily have to be checked in a rather different manner from previously. The following system is designed to give a car which rides with the frame "level" with average loading. For this purpose "average" loading is taken as below for the various body types: 7 Pass. Types Huntington St.{Capt. P. R. Strong} Andrew St.{Capt. P. R. Strong} Regis Max. Av. Front Pass. 2 2 Inter Pass. 2 - Rear Pass. 3 2 Luggage - Lbs. 300 200 5 Pass. Types Dover St.{Capt. P. R. Strong} Martin Max. Av. 2 2 2 - 3 2 300 200 4 Pass. Types Coupelet Max. Av. 2 2 - - 2 1 120 75 From this basis we can formulate a rule for obtaining the flat spring load. Weigh the car front and rear with all fittings, spares, accessories, full tanks and radiator, but no passengers or luggage. No trunk where such is detachable. The spring weights (when flat) are given by the following tables: 7 Pass. or 5 Pass. Front Front weight - 350 / 2 Rear Rear weight + 360 / 2 Coupelet Front Front weight - 260 / 2 Rear Rear weight / 2 Rubber Clearances. The correct height should be checked from rubber clearances. - Continued - | ||