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).
Test report on a shock damper connecting tube of the American type with rubber control pin bushes.
| Identifier | ExFiles\Box 95\4\ scan0065 | |
| Date | 3rd September 1936 | |
| To Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} X 34 Z Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}1/JH.3.9.36. Shock Damper Connecting Tube. American Type - Rubber Control Pin Bushes. With the control pin fixed, a gradually increased load was applied along the central axis of the connecting tube, and the corresponding deflections measured up to 400 lbs. The rating of the rubber pad was thus found to be uniform, the preload being 35 lbs. The torsionaly rating was also found to be uniform up to an angular deflection of 42° after which 'toggling' occurred. After moving through 85°, the tube was released and a 'set' of 30° was recorded. The tube however returned to its normal position after being moved past that position in the reverse direction and released. A hysteresis test showed the frictional torque to be 0.7 lbs/ft. Hs{Lord Ernest Hives - Chair}/W.Bell. | ||