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).
Comparative table of weights for front axle components from the Silver Ghost, New Phantom, and Hispano models.
| Identifier | ExFiles\Box 3\2\ 02-page111 | |
| Date | 17th April 1925 guessed | |
| Handwritten Notes: R CJ BT{Capt. J. S. Burt - Engineer} etc, L200, Below are comparative weights of front axle & brake parts Title: COMPARATIVE WEIGHTS OF FRONT AXLE COMPONENTS Table Data: DESCRIPTION | I.Series. SILVER GHOST. | NEW PHANTOMCodename for PHANTOM I. | HISPANO. AXLE (stripped of all Parts). | 34 lbs 15 ozs | 62 lbs 14ozs | 51 lbs 11 ozs PIVOT(Near Side)(stripped) | 8 lbs. | 11 lbs 9ozs | 10 lbs 8 ozs. PIVOT(Off Side)( " ) | 8 lbs 2 ozs | 12 lbs 1 oz | 10 lbs 6 ozs PIVOT PIN | 1 lbs 10 ozs. | 1 lb 5oz | 1 lb 7 ozs. SIDE STEERING LEVER | 1 lb 15 ozs. | 3 lbs 1 oz | 6 lbs 8 ozs CROSS STEERING LEVER | 2 lbs 3 ozs | 3 lbs 11 ozs. | 3 lbs CROSS STEERING TUBE(completed) | 6 lbs 11 ozs | 9 lbs 6 ozs | 9 lbs 1 oz BRAKE CARRIER PLATES (Complete with Bearings Fulcrum Pin etc.). | | 9 lbs 5 ozs | 5 lbs 8 ozs BRAKE ACTUATING MECHM: (Complete with Pull Rods etc.). | | 3 lbs 2 ozs | 3 lbs 7 ozs BRAKE DRUMS (Stripped) | | 14 lbs 2 ozs | 17 lbs 13 ozs BRAKE SHOE(With Ferodo) | | 3 lbs 1 oz | 3 lbs 4 ozs BALL BRGS IN HUB(Large) | | Hoff:No.350. 2 lbs 15 ozs | 2212A Skefco 2 lbs 11 ozs. BALL BRGS IN HUB(Small) | | Hoff:No.340 1 lb 10 ozs | No.22 RBF. 1 lb 2 ozs. HUB (Shell only) | Dunlop 8lbs 4oz Rudge.W. | 10 lbs 2 ozs | 9 lbs 2 ozs (Continued) HUB (Shell only) | | 11 lbs 5 ozs. | | ||