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).
Moments of Inertia and Centres of Gravity data for car models 28.G.VI, 9.B.V., and 10.B.V.
| Identifier | ExFiles\Box 98\4\ scan0121 | |
| Date | 24th July 1939 | |
| 450d, 400 + 600. To Ds. from Rm{William Robotham - Chief Engineer}/HFP. c. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions} MOMENTS OF INERTIA. The following information about the Moments of Inertia and Centres of Gravity of 28.G.VI, 9.B.V. and 10.B.V. has been obtained. 28.G.VI. Position of Centre of Gravity - 9.9" above the centre line of the wheels and 66 3/4" in front of the rear axle. Weight of car - 4436 lbs. Wheelbase - 136" Moment of Inertia about centre of gravity - 88,000 lb.ft2 Inertia of wheels - 41.85 lb.ft2 per wheel. Unsprung weight including wheels - Front - 270 lbs. total. Rear - 430 lbs. total. 9.B.V. Position of Centre of Gravity - 8.35" above the centre line of the wheels and 59 3/4" in front of the rear axle. Weight of car - 3922 lbs. Wheelbase - 124" Moment of Inertia about transverse axis through the centre of gravity - 71,300 lbs.ft2 Inertia of wheels - 41.85 lbsft2. per wheel. Unsprung weight including wheels - Front 260 lbs. total Rear 410 lbs. total | ||