General Directives For Engine Suspension - Rotax 914 series Installation Manual

10.3) General directives for engine suspension

Rubber mounts to be used between engine and aircraft frame to neutralize vibrations.
Damping elements as generally used in the aircraft industry (e.g. LORD) are suitable.
See Fig. 12.
Fig. 12
07600
▲ WARNING: All elements to balance out vibrations have to be of captive design.
◆ NOTE:
▲ WARNING: The rubber mounts to neutralize vibrations and all the engine suspen-
■ CAUTION:
Effectivity: 914 Series
Edition 2 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
airframe mount
With suspension on the 4 top lugs L3, R3, L4 and R4 only, the tilting
moment due to the pull of the propeller will be avoided while, if attached
on the bottom lugs only, the moment of tilting has to be taken care of
accordingly.
sion components not in the supply volume must be ground run tested
to the specified loads and for vibration behaviour. Certification to the
latest requirements such as FAR or EASA has to be conducted by the
aircraft manufacturer.
The engine suspension has to be designed to prevent any excessive
engine movement and to minimize noise emission and vibration on air
frame side.
See also SL-912-010 "Identifying abnormal vibrations on aircrafts",
latest issue.
◆ NOTE: The fig. shows rubber mount
Lord J 3608-1 resp. J 3608-2.
page 38
July 01/2008