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).
Wind tunnel and performance test results for a 1/8 scale model of the Bentley B.35.AE.
| Identifier | ExFiles\Box 160\2\ scan0207 | |
| Date | 28th January 1935 | |
| BENTLEY B.35.AE (ER HALL Esq) MODEL SCALE 1/8. TEST, DESCRIPTION, WIND TUNNEL DRAG IN LBS, THEORETICAL DRAG AT 100 M.P.H. IN LBS., TRUE DRAG AT 100 M.P.H. CALCULATED FROM TESTED LAP SPEED, COMPUTED DRAG AT 100 M.P.H., K.{Mr Kilner} FROM LAP SPEED, LAP SPEED OF TESTED CAR., LAP SPEED COMPUTED, ROAD WHEEL H.P., WGT 2 UP IN TONS, PROJECTED AREA IN SQ. FT., AXLE RATIO, REMARKS. a, STD. SALOON (TEST 5 IN EV.{Ivan Evernden - coachwork}1/KT. 4 12.33), —, —, 477, —, .00204, 86.0, —, 92.5 AT 4150, 1.7, 23.4, 4.1 TO 1, b, STREAMLINE SALOON (TEST 28 IN EV.{Ivan Evernden - coachwork}1/KT. 4 12.33), —, —, 352, —, .001845, 95.0, —, 92.5 AT 4150, 1.6, 19.025, 3.73 TO 1, WITH 118.5 HP. THIS CAR WOULD LAP AT 104.5 M.P.H. 1, STD. SALOON (RETESTED), 1.2705, 343.0, 477, —, .00204, 86.0, —, 92.5 AT 4150 RPM, 1.7, 23.4, 4.1 TO 1, 2, B.35 AE. WITHOUT REAR FARINGS FRONT TONNEAU COVER, WIND SCREEN & SIDE SPARE WHEEL SEE HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer}16/KW 11.7.34), 1.0690, 285.6, 425, —, .00283, 90.0, —, 92.5 AT 4150 RPM, 1.4, 15.0, 3.73 TO 1, 3, AS TEST 2, BUT WITHOUT HEADLAMPS AND WITH TONNEAU COVERS, TWO SCREEN'S, SIDE SPARE WHEEL, i.e. RACING TRIM. SEE ILLUS. 1., 1.0205, 272.0, —, 417, .00278, —, 99.0, 118.5 AT 4300 RPM, 1.4, 15.0, 3.73 TO 1, 4, AS TEST 3 LESS SIDE SPARE WHEEL., .9924, 264.0, —, 406, .00270, —, 99.5, 118.5 AT 4300 RPM, 1.4, 15.0, 3.73 TO 1, 5, AS TEST 4 BUT WITH FARINGS BEHIND FRONT WINGS., .9165, 242.4, —, 373, .00249, —, 102.5, 118.5 AT 4300, 1.4, 15.0, 3.73 TO 1, 6, AS TEST 5 BUT WITH RADIATOR COWL., .9180, 242.8, —, 375, .00250, —, 102.2, 118.5 AT 4300, 1.4, 15.0, 3.73 TO 1, 7, AS TEST 6 BUT WITH REAR WINGS FARED TO BODY, .9079, 240.0, —, 369, .00246, —, 103.0, 118.5 AT 4300, 1.4, 15.0, 3.73 TO 1, 8, AS TEST 7, BUT WITH BODY BUILT UP TO FOLDED GAUZE SCREEN., .8870, 234.1, —, 360, .00240, —, 103.5, 118 AT 4300, 1.4, 15.0, 3.73 TO 1, 9, AS TEST 8, BUT WITH FARING BEHIND DRIVER'S HEAD., .8777, 231.8, —, 356, .00237, —, 104.0, 118 AT 4300, 1.4, 15.0, 3.73 TO 1, 10, AS TEST 9, BUT WITH BODY MAXIMUM SECTION MOVED FROM FRONT SEAT TO MIDDLE OF SCUTTLE. (ILLUST. 2, 3 & 4), .8746, 230.5, —, 354, .00236, —, 104.3, 118 AT 4300, 1.4, 15.0, 3.73 TO 1, ROLLS-ROYCE, LTD. PRINT ROOM JAN 28 1935 DERBY. | ||