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).
Test report on a B.56.BN Bentley comparing performance with two different types of needles.
| Identifier | ExFiles\Box 83\4\ scan0012 | |
| Date | 23th October 1935 | |
| x200a HOTEL DE FRANCE. CHATEAUROUX, Indre. France. GWH{George W. Hancock - Head Chateauroux}/4/JAB. 23rd October 1935. To. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} From. G.W.H. B. 56. BN.{W.O. Bentley / Mr Barrington} - BENTLEY. Second Test Carried out with new Needles. Petrol Consumption no results owing to flexible tube breaking down and leaking. Please send new one out. L.B.1.Needles. Maximum Speed on Salbris straight 99 MPH. outwards and 100 MPH. inwards. L.B.2.Needles. Maximum Speed outwards 99 MPH. and 100 MPH. inwards. There does not appear to be any difference in acceleration between the two types of Needles. No difference with cut-out opened or closed. G.W.H. Petrol consumption is being taken. Valves start to bounce at 4.600 r.p.m. At 4.700 actually bouncing, taken with third Gear. 5.50 x 18 Tyres, Top Gear, approximately 105 MPH. Speedometer down hill. ---------------- G.W.H.Hancock G.W.H. | ||