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).
Performance test results for cars 6-B-IV and 3-B-IV at Brooklands, detailing times and speeds with different engine configurations.
| Identifier | ExFiles\Box 155\1\ scan0204 | |
| Date | 2nd April 1936 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X1320 Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}14/KW.2.4.36. 6-B-IV & 3-B-IV at Brooklands 31.3.36 & 1.4.36. Car Weights. 6-B-IV. 3-B-IV. | | Lap Time | Speed | 1/2 mile Time | Speed | |---|---|---|---|---| | 3-B-IV with unit from B-56-BN.{W.O. Bentley / Mr Barrington} | 116.6 secs. | 85.72 MPH. | 21.0 secs. | 85.71 MPH. | | 6-B-IV.Large carb. & large ind. pipe. | 115.4 secs. | 86.32 MPH. | 20.8 secs. | 86.54 MPH. | | 6-B-IV.Small carbs. & small induction pipe. | 114.4 secs. | 87.07 MPH. | 20.8 secs. | 86.54 MPH. | | 6-B-IV. Large carb. & small induction pipe. | 113.8 secs. | 87.53 MPH. | 20.8 secs. | 86.54 MPH. | | 6-B-IV. Repeat on second day. Large carb. & small induction pipe. | 113.8 secs. | 87.53 MPH. | 20.0 secs. | 90.00 MPH. | | 6-B-IV.Large carb. & small induction pipe. Cut-out plate removed. | 112.8 secs. | 88.3 MPH. | 20.0 secs. | 90.00 MPH. | | As above with mixture control 4 notches strong. | 112.0 secs. | 88.9 MPH. | 20.0 secs. | 90.00 MPH. | | As above with carb. needles lowered 1/16". In this test the water temp. went up 7°. | 112.0 secs. | 88.9 MPH. | 20.0 secs. | 90.00 MPH. | | 6-B-IV.Large carb. & small pipe, cut-out plate off, carbs.normal and R.R. ignition. | 112.4 secs. | 88.62 MPH. | 20.0 secs. | 90.00 MPH. | | 6-B-IV.Cyl.head,large carbs. & large ind. pipe off 3-B-IV,late B-56-BN.{W.O. Bentley / Mr Barrington} R.R. ignition. | 113.6 secs. | 87.68 MPH. | 20.0 secs. | 90.00 MPH. | TESTER - A.B.Roberts. Hs{Lord Ernest Hives - Chair}/F.Dodd. | ||