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).
Calculating the moment of inertia and radius of gyration for the Goshawk flywheel and clutch using the 'Bifilar Suspension' method.
| Identifier | ExFiles\Box 74\2\ scan0375 | |
| Date | 19th December 1924 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}/ACL/LG19.12.24. Handwritten: X4244 MOMENT OF INERTIA OF GOSHAWK FLYWHEEL AND CLUTCH. Handwritten: X5300 The moment of inertia of the Goshawk flywheel complete with clutch was determined experimentally by means of the 'Bifilar Suspension' method in exactly the same way as stated in report on 40/50 HP. and EAC. flywheels. The following results were obtained :- Length of supporting wires (l) = 6.64 ft. Distance between wires (d) = 1.166 ft. Weight of complete flywheel(W) = 100.81 lbs. Time for 30 oscillations = 69 secs. .. time for one " = 2.3 secs. Rad. gyration)^2 = K^2 = (t^2 d^2 g) / (16 π^2 l) = (2.3^2 X 1.166^2 X 32.2) / (16 π^2 6.6406) = 0.2209 ft^2. .. Rad. of gyration (K) = 0.47 ft. Mom. of inertia (I) = (W / g) K^2 = (100.81 x .2209) / 32.2 = 0.691 units. MOMENT OF INERTIA = 0.691 units. RADIUS OF GYRATION = 0.47 ft. OR 5.64 in. Hs{Lord Ernest Hives - Chair}/ACL. | ||