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 (M.I.) test results and calculations for a valve rocker assembly.
| Identifier | ExFiles\Box 88\4\ scan0131 | |
| Date | 18th February 1935 | |
| VALVE ROCKERS - M.I. TESTS E45230 ROCKER - COMPLETE WITH BUSHES, PLUGS, & ADJUSTING SCREW. TEST 1. ¢ OF ADJUSTING SCREW PARALLEL TO ¢ OF PENDULUM. PERIODIC TIME PENDULUM + ROCKER t,, = .795 SECS. " ONLY t, = .768 " WEIGHTS. PENDULUM (W,) = 218.6 GRAMMES. ROCKER (W,,,) = 131.3 " PENDULUM + ROCKER (W,,) = 349.9 " CENTRE OF GRAVITY. WITH ROCKER x,, = 4.898" WITHOUT " x, = 3.994" M.I. WITH ROCKER - ABOUT AXIS OF SUSPENSION Is = (.795² x 349.9 x 4.898) / (4π² x 28.35 x 16 x 12) = .005033. M.I. WITHOUT ROCKER - ABOUT AXIS OF SUSPENSION Is = (.768² x 218.6 x 3.994) / (4π² x 28.35 x 16 x 12) = .002396 TEST 2. ¢ OF ADJUSTING SCREW AT RT L's TO ¢ OF PENDULUM. PERIODIC TIME t,, = .788 SECS, t, = .768 SECS. WEIGHTS W, = 218.6 GRAMMES, W,,, = 131.3 GRAMMES, W,, = 349.9 GRAMMES C.O.G x,, = 4.914" x, = 3.994" M.I. WITH ROCKER - ABOUT AXIS OF SUSPENSION Is = (.788² x 349.9 x 4.914) / (4π² x 28.35 x 16 x 12) = .004966 M.I. WITHOUT ROCKER - ABOUT AXIS OF SUSPENSION. Is = .002396. Diagram Labels: 6.300" CTS.{C. Trot Salt - Carburation} S x (Without Rocker) x,, (With Rocker) G, W, G,, W,, W,,, | ||