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).
Blueprint comparing four different designs of flexible spring shackles used by various manufacturers.
| Identifier | ExFiles\Box 181\M9\ img073 | |
| Date | 21th October 1931 guessed | |
| Top Left Panel: FLEXIBLE SHACKLE ON 8 CYL STUTZ (DESCRIBED AS PATENT SHIMMY SHACKLE) REAR END OF FRONT SPRING. Top Right Panel: SLOTTED PLATE REGULATING AMOUNT OF TRAVEL. SPRING GUIDE. BOLT PASSING THRO' WEB. MORRIS ISIS FLEXIBLE SHACKLE AT REAR END OF SPRING. Bottom Left Panel: PRINCIPLE OF REAR END FLEXIBLE SHACKLE AS USED ON:- PACKARD MARMON, R.R. EXP'TL. Bottom Right Panel: PRINCIPLE OF FRONT END FLEXIBLE SHACKLE AS USED ON BUICK, CADILLAC, DARRACQ STUDEBAKER. | ||