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).
Letter to Automotive Products Co., Ltd. regarding casting alloys, brake drawings, and specific component dimensions.
| Identifier | ExFiles\Box 121\1\ scan0390 | |
| Date | 17th December 1940 | |
| c. Rm.{William Robotham - Chief Engineer} c. Ev.{Ivan Evernden - coachwork} Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions}1/RH.{R. Hollingworth} 1029 17.12.40. Automotive Products Co., Ltd., Tachbrook Road, LEAMINGTON SPA. For the Attention of Mr.F.G.Parnell Dear Sirs, In reply to your letter of the 12th. December, we are finding out the alloy used for all the castings supplied to you and will let you know the answer as soon as possible. We are sorry to hear of the porosity of some of the earlier castings supplied and are endeavouring to get some more of these cast. The wheel cylinder drawings should enable the front brake scheme to be finished off and details will be sent to you as soon as possible. With regard to the 1 1/32" dimension on the bisectors, in view of the uncertainty of this being actually required, Mr. Robotham is very unwilling to add the extra metal to the drums - amounting to over 1lb. per car - at this stage. We are accordingly proceeding on the assumption that you can clear the job experimentally, and we can see various ways by which the figure we require could be obtained on production. You may remember that on the last visit of Mr. Rigby and myself to your works, we agreed on the rear brakes to remove our dust excluder pressing from between the bisector body and the carrier plate proper. On investigating this, we find that there is not room beyond the stud bosses on the bisector and wheel cylinder to obtain a joint between carrier plate and water excluder and still accommodate the radius -Continued- | ||