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).
The advantages and disadvantages of different vehicle suspension systems, including quarter elliptic springs.
| Identifier | ExFiles\Box 178\1\ img182 | |
| Date | 28th August 1926 | |
| - 10 - (i) Maximum lateral strength. (ii) Ease of attachment. (iii) No question of spring seat rotation. (IV) Lateral and torsional rigidity. (V) Ability to take torque reaction. (VI) Security against breakage. Its disadvantages are:- (i) Inability to absorb horizontal shocks. (ii) High unspring weight. These points are all more or less self-explanatory. Advantage (iii) refers to spring seat rotation under deflection. This occurs in a 3/4 elliptic spring unless special precautions are taken, also on 1/4 elliptic springs. Advantage (IV) means absence from rolling, (V) means that Hotchkiss drive can be employed. An advantage of Hotchkiss drive is that torque transmission has a beneficial effect on the internal friction of the spring, somewhat reducing it. (c) Quarter elliptic. This type of suspension is very popular on light cars because it saves weight and cost in reducing and simplifying the weight and construction of the frame Its other advantages are:- (i) Its lateral rigidity is good. (ii) It can absorb horizontal shocks if it is inclined. Disadvantages:- (i) Insecurity against breakage. (ii) Throws a big local bending moment on frame. (iii) Unless special provision is made it is not good for taking torque. (IV) Is liable to affect steering by altering the pivot angle under permanent set. contd. | ||