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).
Measurement data for bonnet movement under chassis torsion for various car models.
| Identifier | ExFiles\Box 104\3\ scan0162 | |
| Date | 21th June 1932 guessed | |
| BONNET MOVEMENT. Measurements taken in .001" of an inch. Nearside Front & Offside Rear Wheel raised 3" from the ground. P.2. Diamond Engine Mounting. Dash Bonnet -38 +55 +39 -24 Radiator -46 +42 -75 +76 Average Movement .050" 25 H.P. Diamond Engine Mounting. -40 +34 +18 +18 -43 +44 -37 +55 Average Movement .036" J.III. -21 +12 +3 -2 -13 +14 -20 +35 Average Movement .015" | ||