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).
Instructions for interpreting test results based on flash brilliancy and gap width.
| Identifier | WestWitteringFiles\I\October1922\ Scan73 | |
| Date | 26th July 1922 | |
| ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.C. Order No P.B. 44 Customer's No. X As it is, when testing, it must first be decided what is normal. gap brilliancy Having got that, it is fairly safe to infer that, a regularly occurring flash brighter than the others, is due to the gap under test, and that it is too wide; and not an inductive flash due to sparking on the other gaps. This however, cannot be done so easily for conditions 1 and 2, whose indications are no flash at all, or a dim one. Signed C.A.P. This Sheet must be filed on completion of the work. RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 | ||