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).
Comparing a Bentley 'Close-Centres' Head with a Standard Head.
| Identifier | ExFiles\Box 133\2\ scan0112 | |
| Date | 11th December 1934 guessed | |
| EXPERIMENTAL DEPARTMENT REPORT. L.L. Smith REFERENCE :- Hs{Lord Ernest Hives - Chair}/Wd.{Mr Wood/Mr Whitehead}/CHP.1/GB.11.12.34. Subject of Report:- Comparison of Bentley "Close-Centres" Head with Standard Head. General Conclusions: The "Close-Centres" Head obtained by simple alteration to the Standard Head gives better performance than the Standard Head. The gain in power may be from 6.0 - 8.7% over the whole speed range or from zero at low speeds to 15.6% at 4500 r.p.m. according to the choice of valve timing, the latter with less detonation than standard. Copies of Report Circulated to :- Wor.{Arthur Wormald - General Works Manager}, E.{Mr Elliott - Chief Engineer}, (Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}) Rg.{Mr Rowledge}, By.{R.W. Bailey - Chief Engineer} Report to be noted for further action by :- Hs{Lord Ernest Hives - Chair}/Wd.{Mr Wood/Mr Whitehead} Test carried out on :- Universal Unit. By :- Hs{Lord Ernest Hives - Chair}/CHP. Test No. Date :- 12.10.34 to 30.11.34. RR 2X (50H) (63974. 6-6-34) G.C.B. | ||