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).
Approved spark plugs for Kestrel engines with take-off boost.
| Identifier | ExFiles\Box 58\2\ Scan194 | |
| Date | 13th May 1935 | |
| V6000 EP.{G. Eric Platford - Chief Quality Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Lp.{Mr Lappin} c. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Wst.6/MA.13.5.35. PLUGS FOR KESTREL ENGINES WITH 6 lbs "TAKE-OFF" BOOST. We have received a telephone message from Mr.Emtage of the Air Ministry to the effect that Lodge A2B/2, K.L.G. V7/2B and V9/IB are all approved plugs for the above Kestrel engines. He states that K.L.G. V7/2B plugs have not given any trouble, and we should like your confirmation of this as if this is the case there will be no need to fit the V9/IB plugs which are not as good at very high altitudes as the Lodge A2B/2 or K.L.G. V7/2B. Hs{Lord Ernest Hives - Chair}/Wst. | ||