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).
Duplication of the 'PL' prefix used for drawing numbers.
| Identifier | ExFiles\Box 148\2\ scan0297 | |
| Date | 1st October 1940 | |
| To Rbr{Mr Rubbra}/RRP. from Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} c. to Rm.{William Robotham - Chief Engineer} Ev.{Ivan Evernden - coachwork} Ev{Ivan Evernden - coachwork}/HH. Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames}9/JH.1.10.40. PREFIX LETTERS IN USE WITH DRAWING NUMBERS. With reference to the copy of KD.30 recently circulated we should like to have incorporated QPL. schemes. Armament installation drawings. We also notice that PL. prefix letters are used for shop office layouts by JRD's. section. We have ourselves been using PL. letters for a year in connection with car design and have about 350 drawings with PL letters. We recently did some shop layouts for JRD. and gave them PL. numbers so it may be found that actually JRD. does not use PL. letters as suggested on KD.30 which will clean the duplication up easily. Would you please enquire into this matter and let us know the result. EV{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} Handwritten text: 1260 | ||