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).
Clearance issues and required alterations when fitting the subframe body to the India IV chassis.
| Identifier | ExFiles\Box 5\2\ 02-page218 | |
| Date | 10th December 1928 | |
| To DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} from Hs.{Lord Ernest Hives - Chair} cc to HY.{Tom Haldenby - Plant Engineer} X5830 Hs{Lord Ernest Hives - Chair}3/L.G.10.12.28. INDIA IV. SUBFRAME. X5380 A great deal of time was wasted in fitting the subframe body to chassis No.14-G-IV owing to insufficient clearances between the subframe and chassis parts. In our opinion this could be avoided and will have to be avoided for a production job by slight alterations to the subframe or chassis. We agree that if every part is made exactly to drawing size there would be no difficulty, but the width of the chassis varies, also the subframes cannot be made exactly the same width, position of cross members also must vary slightly. There is not enough latitude allowed to compensate for these variations. The main points where the trouble occurs are : (a) Hand Brake Quadrant. The clearance allowed at this point is insufficient, on 14-G-IV the whole hand brake lever quadrant and bracket had to be altered to allow the body to drop over; even after this had been done to gain the max. possible advantage there remains less than .060" clearance between the hand brake lever and the subframe. Could not the subframe be pocketed at this point? with a larger clearance we stand a better chance of making an efficient draught excluder. (b) Front subframe cross member. This drops on to the first chassis cross member to the rear of the gearbox. It was necessary to [strikethrough]ax[/strikethrough] file away the flange of the subframe cross member locally to obtain clearance. Difficult to overcome except by moving the subframe cross member .50" to rear. | ||