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).
Alteration to the Wraith III Regulator & Resistance Unit.
| Identifier | ExFiles\Box 166\2\ img121 | |
| Date | 28th October 1937 | |
| To: HFG. c.c. BY c.c. Em/RC.{R. Childs} c.c. RHC{R. H. Coverley - Production Engineer}/CAN. 6092. BY/RD.2/B.28.10.37. WRAITH III. Regulator & Resistance Unit : Sec.8290. Please receive herewith our alteration 1554/Dss., adding to LOP. DW.392 the following parts, blueprints of which are attached herewith :- DW.493 - Support - Field Resistance. 2 off. DW.494 - Pillar - Field Resistance. 1 off. Will you please arrange to have these parts embodied in the sets that you are now building. Sufficient Resistance Wire for this job, should be available, see our memo' BY/RD.6/B.8.10.37. Blueprints of RR.Sch.896 (Sht.2) - Resistance Unit Mounting, are attached herewith. BY/RD. | ||