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).
Revised matrix weights table showing weights, frontal area, depth, volume, and weight per unit volume for various models.
| Identifier | ExFiles\Box 96\4\ scan0016 | |
| Date | 25th March 1935 | |
| X358 He/Std.1/KW. 25.3.35. REVISED MATRIX WEIGHTS. Matrix | Weight lbs. | Frontal Area Sq.Ins. | Depth Ins. | Vol. Cu.Ins. | Wt./ Unit Vol. lbs/ Cu.Ins. Bentley old Std. Marston Mark III. | 38 | 470 | 3.305 | 1553 | .0245 Bentley new Std. Marston Mark V | 31.5 | 470 | 2.285 | 1073 | .0294 Central Mounting Wings and Rad. - Bentley Rad. Marston Mark V.{VIENNA} | 28.25 | 401 | 2.285 | 916 | .0309 6" shorter Matrix, Bentley Marston Mark V.{VIENNA} | | 356 | 2.285 | 813 | Std. Shape Bentley Harrison Vee (U.S.A.) | 26 | 470 | 2.060 | 969 | .0269 Std. 20/25 Marston Mark III. | 45 | 560 | 3.305 | 1850 | .0243 20/25 Std. Shape Marston Mark V.{VIENNA} | 35.50 | 560 | 2.285 | 1280 | .0278 SpectreCodename for Phantom III - E.85830 (1st type) Harrison Vee (U.S.A.) | 48 | 587 | 3.305 | 1940 | .0248 SpectreCodename for Phantom III - Latest Type Marston Mark V.{VIENNA} | 58 | 610 | 3.305 | 2015 | .0288 | ||