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).
Moment of Inertia tests performed on a valve rocker assembly.
| Identifier | ExFiles\Box 88\4\ scan0132 | |
| Date | 18th February 1935 | |
| VALVE ROCKERS - M.{Mr Moon / Mr Moore} I. TESTS. Eº 41590 ROCKER - COMPLETE WITH BUSHES, PLUGS, & ADJUSTING SCREW. ¢ OF ADJUSTING SCREW AT RT. ∠s TO ¢ OF PENDULUM. TEST 1. ROCKER OUTSIDE PENDULUM. PERIODIC TIME. PENDULUM + ROCKER E₁₁ = .8475 SECS. ONLY E₁ = .756 " WEIGHTS PENDULUM W₁ = 200 GRAMMES ROCKER W₁₁₁ = 126 " PENDULUM + ROCKER W₁₁ = 326 " CENTRE OF GRAVITY WITH ROCKER x̄₁₁ = 5.24" WITHOUT " x̄₁ = 3.788" M.I. WITH ROCKER - ABOUT AXIS OF SUSPENSION. I_s = (.8475² x 326 x 5.24) / (4π² x 28.35 x 16 x 12) = .005709 M.I. WITHOUT ROCKER - ABOUT AXIS OF SUSPENSION I_s = (.756² x 200 x 3.788) / (4π² x 28.35 x 16 x 12) = .002014 TEST 2. ROCKER INSIDE PENDULUM. PERIODIC TIME. t₁₁ = .755 SECS t₁ = .756 SECS WEIGHT W₁ = 200 GRAMMES, W₁₁₁ = 126 GRAMMES, W₁₁ = 326 GRAMMES. C.O.G. x̄₁₁ = 4.27 x̄₁ = 3.788" M.I. WITH ROCKER - ABOUT AXIS OF SUSPENSION. I_s = (.755² x 326 x 4.27) / (4π² x 28.35 x 16 x 12) = .00369. M.I. WITHOUT ROCKER - ABOUT AXIS OF SUSPENSION. I_s = .002014. HB{C. E. Harcombe} | ||