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).
Graph of servo efficiency curves comparing load input against load output for various mechanical configurations.
| Identifier | WestWitteringFiles\T\2July1929-December1929\ Scan061 | |
| Date | 20th September 1928 | |
| SERVO EFFICIENCY CURVES (S.S.) SPRING BALANCES FOR ASCERTAINING LOADS "A" & "B" RIGGED UP AS SHOWN ON V536. LOAD OUTPUT "B" (LBS.) 100, 200, 300, 400, 500, 600, 700 LOAD INPUT "A" (LBS.) 200, 300, 400, 500 CURVE ⑦ CURVE ① CURVE ⑥ CURVE ⑤ CURVE ② CURVE ③ CURVE ④ CURVE N°1. 45° CAMS: OIL SOAKED "COTTON A" FABRIC. CURVE N°2. 45° CAMS: DRY "COTTON A" FABRIC. CURVE N°3. 45° CAMS: DRY "COTTON A" FABRIC: POLISHED DRIVING PINS & BUSHES. CURVE N°4. 30° CAMS: DRY "COTTON A" FABRIC: POLISHED DRIVING PINS & BUSHES. CURVE N°5. 30° CAMS: OIL SOAKED "COTTON A" FABRIC: POLISHED PINS & BUSHES. CURVE N°6. 45° BALL-BEARING CAMS: OIL-SOAKED FABRIC: POLISHED PINS & BUSHES. CURVE N°7. 45° CAMS (PLAIN): OIL SOAKED "COTTON A" FABRIC: POLISHED PINS & BUSHES. | ||