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 weight and capacity specifications for four different types of radiators.
| Identifier | ExFiles\Box 78\3\ scan0024 | |
| Date | 11th June 1912 guessed | |
| 14/ X496 Standard radiator weight 88lbs empty. capacity 5.125 galls full. Hemingways radiator Weight 91 lbs empty. Capacity 3.0 galls. full. Zimmerman radiator Weight 77.5 lbs weight. Capacity 4.375 galls. full Forman radiator Weight 62 lbs empty. Capacity 3.625 galls. full. CoydL | ||