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).
Drawings for Peregrine and Japan I cylinder heads fitted with 14 m/m sparking plugs.
| Identifier | ExFiles\Box 2\3\ B002_X 116 117 119 120-page26 | |
| Date | 3rd June 1932 | |
| XHQ-? RECEIVED 24 JUN 1932 To BT.{Capt. J. S. Burt - Engineer} c. Hs.{Lord Ernest Hives - Chair} E/JNR{Charles L. Jenner}/1/HP.3.6.32. X5050. Cylinder Heads. We send you herewith drawings:- LeC.3118. Peregrine Cyl. Head. 3119. Japan I showing 14 m/m sparking plug fitted to improve the water ways around the plug. E/JNR.{Charles L. Jenner} | ||