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(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) FLYWHEEL AND CLUTCH. Handwritten: X5300 The moment of inertia of the Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 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. | ||
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).