New Engine Mountings
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THE advantage of arranging the J. mountings of an engine so that vibration takes place about the principal axis of oscillation of the unit has long been recognized. If this method of mounting be not employed, there are vibrations about two axes with different frequencies.
In some instances, the mountings at the rear are difficult to arrange axially, because of the layout of other chassis components. To meet this problem, MetaIastik, Ltd., Leicester, has produced a special Metacone mounting, known as the SL (slotted) type, with slots cut parallel to the centre line, giving differential stiffness in three planes.
The mountings are located with the slots in line with the transverse plane, and by virtue of the high flexibility allowed in this plane, the mountings may be offset without introducing a second axis of oscillation.
Whilst vertical flexibility is also advantageously increased, the solidrubber sections at right angles to the slots provide a high degree of stiffness against fore-and-aft movements.