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).
Modifications to the Goshawk II engine's battery ignition system, with reference to three new drawings.
| Identifier | WestWitteringFiles\J\December1922\ Scan15 | |
| Date | 1st December 1922 | |
| TO HY.{Tom Haldenby - Plant Engineer} FROM E.{Mr Elliott - Chief Engineer} c. to C.I. WOR.{Arthur Wormald - General Works Manager} c. to HS.{Lord Ernest Hives - Chair} RFC. ORIGINAL RECEIVED (stamp) X3485 X4079 GOSHAWK 11. BATTERY IGNITION. X4070 We send you herewith the following drawings:- Lec 1653 - Improved Ignition Coil in cooler position, and Distributor Moulding with side connections. Lec 1656 - Ignition Wiring carried on cylinder head. Lec 1657 - Present coil in cooler position used in conjunction with new H.T. Distributor Moulding having side connections. These three drawings give you the combinations of all possible modifications you may wish to make to future engines. We already have the scheme whereby the coil is retained in it's present position, but heat and electrically insulated from the engine. Lec 1656 and 1657 now shew how the present coil may be carried in a cooler position on the wheelcase, and in the case of the former drawing, used in conjunction with the present distributor by altering the ignition wire carrier tube to be supported from the cylinder head instead of the valve rocker cover. The alteration to the wiring is very desirable in connection with all schemes, as with the new proposal it is not necessary to disturb the ignition gear when adjusting valve tappet clearances. The next move is to alter the H.T. distributor moulding as shewn on Lec 1653 so that a short connection is obtained for the central H.T. lead to the coil, and it is no longer necessary to take this lead through the elbow above (1) | ||