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).
Technical table comparing radiator movement under various engine mounting, body, and ballast configurations.
| Identifier | ExFiles\Box 15\1\ Scan078 | |
| Date | 1st February 1929 guessed | |
| RADIATOR MOVEMENT. | Engine Mounting. | Type of body or ballast. | Body mounting or ballast distribution. | Condition of cross. | % Radiator movement 18-EX 10,000 miles - condition taken as 100% | |---|---|---|---|---| | (1) Four Phantom type flexible rubber engine feet. | Chassis test kit. | Canvas scuttle ballast over rear spring centre. | Attached as design. | NIL. | | (2) As above (1) | As above. | Mass of 200 lbs. attached each side of frame over front subframe brackets. | As above (1) | NIL. | | (3) As above (1) | Covered test limousine body. | Bolted directly to frame without subframe. | As above (1) | 5% | | (4) As above (1) | Enclosed Barker Limousine. | Mounted on std. subframe with normal rubber pads i.e. in 18-EX original 10,000 miles condition. | As above (1) | 100% | | (5) Four torsional stiff rubber engine feet. | As above (4) | As above (4) | As above (1) | 20% | | (6) As above (5) | As above (4) | Solid alum. packings under front subframe supports scuttle bolted solid to dash. | As above (1) | 10% | | (7) As above (5) | As above (4) | Body single point mounted at front flexible semi-isolation scuttle to dash. | As above (1) | 7% | | (8) As above (5) | As above (4) | As above. | Cross torsional rigidity removed. | 2% | | (9) As above (5) | As above (4) | Mounted on std. subframe with normal rubber pads. | As above. | 5% | In addition, removing the tie rods, tightening up the W.W. dampers behind the gearbox and increased cross steering tube friction all appeared to reduce radiator movement. | ||