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 graph of an automatic boost regulator for an F. Engine T.49 under test conditions.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan057 | |
| Date | 11th September 1930 | |
| CHARACTERISTIC OF AUTOMATIC BOOST REGULATOR. TESTS ON FULL SUPERCHARGED. F.{Mr Friese} ENGINE. T.49. BOOST REGULATOR DES. 1293. Y-AXIS (LEFT & RIGHT): BOOST PRESS. lbs/sq" VALUES: +2, 0, -2, -4, -6, -8 X-AXIS (BOTTOM): PILOTS LEVER MOVEMENT (PER CENT). VALUES: 0, 20, 40, 60, 80, 100 X-AXIS (RIGHT): ALTITUDE. FT. VALUES: 2000, 4000, 6000, 8000, 10,000 ANNOTATIONS: SLOW RUNNING. "TAKE OFF" BOOST 1.8 lbs/sq" RANGE OVER WHICH PILOTS LEVER MOVEMENT IS ABSORBED BY POWER PISTON MOVEMENT. R.P.M & BOOST REMAIN CONSTANT. i.e. 1610 & -2.93lbs/sq" PISTON STARTS TO RISE. PISTON AT TOP OF STROKE ① VIOLENT OSCILLATION OF PISTON TAKES PLACE OVER THIS CONST. BOOST RANGE AT GROUND LEVEL. ② IF ANEROID FAILS THROTTLE IS FULLY OPENED. 1850 R.P.M GROUND RUNNING. MECHANICAL OPENING TO FIXED STOP PILOTS LEVER FULL OPEN. 2250 R.P.M FLYING. ANEROID SET TO GIVE THIS BOOST AT 4,500 FT. UP DOWN. CONSTANT SPEED 2250 R.P.M. FULL THROTTLE | ||