Abstract
UPON completion of the design for the engine mounting it is most desirable that some ground testing should be carried out before the mounting is flight tested. These tests will provide information on the mounting resonances and modes of vibration, deflexions of the engine and mounting under load and they may also be extended to include proof and ultimate load tests for various critical flight cases. The degree of vibration isolation achieved can also be estimated bearing in mind the differences in suspension on the test beds compared with the actual aeroplane and any changes found to be necessary can be incorporated and tested more readily on the ground than in the air.
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