Table detailing the Centre of Gravity and total weight for Goshawk-11 car models with different coachwork.
| Identifier | WestWitteringFiles\K\June1923\ Scan63 | |
| Date | 5th June 1923 guessed | |
| EFFECTIVE TYRE DIAMETER TAKEN AT 31.4" Car. C. of G. {Mr Griffiths - Chief Accountant / Mr Gnapp} in length. C. of G. {Mr Griffiths - Chief Accountant / Mr Gnapp} in width. Ht. of C. of G. {Mr Griffiths - Chief Accountant / Mr Gnapp} above the ground. Springs choc-a-bloc at normal Total weight of car. 2-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. Touring car. (Mulliner) 71.5" from the centre of the front track. Central 23.97" 27. cwts. 1 qr. 3-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. Limousine car. (Hooper). 73.3" from the front track. 26.8" from O.S. track. 27.98" 31. cwts. 0 qrs. 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. Saloon car. (Maythorn) 75.4" from the front track. Central. 27.88" 33 cwts. 0 qrs. With the springs unclamped the cars behaved as if their centres of gravity were the following heights above the ground:- Touring car (springs free) 25.27" Limousine " ( " " ) 30.13" Saloon " ( " " ) 30.01" These latter figures are, of course, only useful when compared to one another as with the springs free, the body heeled over in relation to the chassis. The figures do not represent the true heights of the centre of gravity, springs free. Ha/Rm. {William Robotham - Chief Engineer} | ||
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).