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).
Calculations for torque and stress on the Rippletto Axle.
| Identifier | ExFiles\Box 114\1\ scan0253 | |
| Date | 1st November 1939 | |
| Appendix 1. -2- Ev.{Ivan Evernden - coachwork}7/JH.1.11.39. Rippletto Axle. Taking engine torque = (2000 x 115) / (4 x 16.38) = 1.115 lbs.in. BMEP. 115 lbs.sq.in. 1/2 shaft torque. = 3770 lbs.ins. Axle Tube. 1. Static wheel load at tyre = 1085 lbs. 2. Static wheel load at bearing = 1035 lbs. 3. Wheel load at bearing under torque = 1225 lbs. 4. Spring pad load static = 940 lbs. Stress in axle tube due to (3) = 10.420 lbs.sq.in. 1/2 shaft stresses. Max Stress due to torque at 31/32" section = 49.200 lbs.sq.in. Max combined bending and torsion stress = 26.900 lbs.sq.in. Ev.{Ivan Evernden - coachwork} | ||