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).
And blueprint diagram analysing Packard's engine mounting system.
| Identifier | ExFiles\Box 178\2\ img184 | |
| Date | 19th February 1934 | |
| -5- ENGINE MOUNTING. Packards are enthusiastic about their engine mounting. It appears to me to be an intelligent crib of the Chrysler with the merit that it avoids their patents. The great point is to arrange the front support so that the line joining it with the rear is the rotational axis when the frame tries to shake the engine. Thus the frame has to translate the engine bodily when it wants to jelly. PACKARD ENGINE MOUNTING. C of G "X" IN PRACTICE CAME OUT A LITTLE HIGHER THAN THEY LIKED TWO RUBBER FEET INCLINED TO MAKE "X" THE VIRTUAL SUPPORT TORQUE ARM MORE HORIZONTAL THAN VERTICAL FLEXIBILITY DUE TO VARIATION IN RUBBER THICKNESS | ||