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 detailing the results of modifications to engine mountings and torque reaction dampers.
| Identifier | ExFiles\Box 11\5\ 05-page196 | |
| Date | 15th October 1934 guessed | |
| - 2 - Engine feet rubbers completely removed, leaving only brackets, other features maintained. 1. Made no difference to steering. 2. Made no difference to engagement of clutch. 3. Engine period not taken as engine rocked right over with torque. 4. Booms reduced in volume 25%. 5. Wing movement no different. 5. Torque reaction dampers made choc-a-bloc. 1. Steering further improved for steadiness. 2. Clutch engagement no difference. 3. Engine period good standard for torque reaction. 4. Booms - not materially affected. 5. Wing and head lamp movement 99% steady. The torque reaction dampers have a definite effect upon wing steadiness. The reason being in our opinion, the dampers act as an extra stay in steadying the engine top movement. 6. Soft rubber engine feet mounting refitted. Torque reaction dampers load set to approximately 35 to 40 lbs. 1. Steering good. 2. Clutch good. 3. Engine torque period as standard cuts right out at 5 MPH. 4. Wing and head lamp movement good; noticable only on rough roads. 5. Booms practically the same as N°4 test. The front engine feet do affect booms. This condition of the front engine mounting gives the best all round results. The clutch has not been interfered with in any shape or form. G.W.H. Hancock G.W.H. | ||