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).
List of modifications and new parts for 40/50 HP and 20 HP models subject to a bump test.
| Identifier | ExFiles\Box 119\2\ scan0331 | |
| Date | 6th June 1929 guessed | |
| BUMP TEST. 40/50 HP. 1. Tubular cross members. 2. Strengthened front dampers with larger section neck. Nitro alloy parts. 3. Cross steering tube with new bend to miss front dampers. 4. Larger balls and ball ends. 5. New front springs with lubricating hole drilled through shackle. 6. Latest engine feet. 7. Single spare wheel carrier and luggage grid (as on 22-EX.) 20 HP. 1. New side wheel carrier. 2. New strengthened rear dampers with Nitro alloy steel pins of greater length. ------------ Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||