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).
Requesting the casting of specific Lockheed pattern parts, noting a previous complaint from Lockheeds about a 50% scrap rate due to porosity.
| Identifier | ExFiles\Box 121\3\ scan0149 | |
| Date | 1st September 1941 | |
| Mr. Edwards from Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} c. Mr. Wheeler. c. Mr. Walker. 1029. Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby}7/RH.{R. Hollingworth}1.9.41. Will you please cast the following all in A/C 403; Mr. Walker has the Lockheed patterns referred to :- Wheel Cylinder. PR.654/1. 18 off. Bisector. PR.649/1. 6 " " PR.649/7. 6 " We have already supplied some of these castings to Lockheeds for them to machine and test, and they have complained that 50% were scrap due to porosity. Although this is probably an exaggeration, it is evidently a point to be watched. Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} | ||