Weight comparison and analysis between the 3-Goshawk-11 and 7-Goshawk-11 models.
| Identifier | WestWitteringFiles\K\June1923\ Scan66 | |
| Date | 12th June 1923 | |
| DETAILS OF 3-GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 AND 7-GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. In order to account for the 2 cwts. greater weight of 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 we examined the two cars with the following results :- Extra weight 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 chassis. Luggage grid. 11 1/2 lbs. Two large tool boxes on running board. 25 lbs. Due to wider running boards. 12 lbs. 48 1/2 lbs. Extra weight 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 Body. Two doors on 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 weight 17 lbs. more than the 4 doors on 3-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. 17 lbs. Due to heavier panelling and second set of window raisers. 40 lbs. (estimated) Due to width of seating being 2 1/2" greater on 7-G-11 than on 3-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. 40 lbs. (estimated) Due to difference in roofs (assuming no angle iron in 3-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11) 12 lbs. 109 lbs. Leaving 1/4 cwts. which we are unable to account for by external observation - this may either be due to different chassis weights or different body weights. In addition, owing to the tools of 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 being carried on the running boards, their mass is concentrated at 18" above the ground, while those of 3-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 being under the seat, are concentrated at 32" above the ground. This will throw the centre of gravity of the Limousine a little higher in comparison to the Saloon than it should be. Hsg/Rn. {Mr Robinson} | ||
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).