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).
Comparison table of weights for various Bentley radiator components.
| Identifier | ExFiles\Box 87\1\ scan0137 | |
| Date | 22th January 1935 | |
| X240 22.1.35. BENTLEY RADIATOR WEIGHTS. | Component | Std. Bentley Rad. | 58 mm. Mark III Matrix and Narrow Bottom Tank otherwise std. | 58 mm. Matrix & all possible lightening. | |---|---|---|---| | Matrix | 36 lbs. 4 ozs. 38 LBS | 29 lbs. 0 ozs. 31 LBS 8 ozs | 25 lbs. 3 ozs. (area reduced by 20%). 25 LBS. 3 ozs | | Top Tank | 2 lbs. 14 1/2 ozs. | 2 lbs. 14 1/2 ozs. | 2 lbs. 10 ozs. | | Bottom Tank | 5 lbs. 3 ozs. | 4 lbs. 11 ozs. | 4 lbs. 11 ozs. | | Shell and odd fittings - solder etc. | 26 lbs. 0 ozs. | 24 lbs. 12 ozs. | 23 lbs. 0 ozs. | | Shutters & Controls | 12 lbs. 14 ozs. | 12 lbs. 14 ozs. | 7 lbs. 7 ozs. (grille). | | Water | 20 lbs. 0 ozs. | 13 lbs. 12 ozs. | 11 lbs. 3 ozs. | | Total | ~~105~~ 103 lbs. 4 ozs. | 90 88 lbs. 0 ozs. | 74 lbs. 2 ozs. | | Saving in weight over standard | - | 15 lbs. 4 ozs. | 29 LBS 2 ozs ~~31 lbs. 2 ozs.~~ | Hs{Lord Ernest Hives - Chair}/C. S. Steadman. | ||