Re: What no-one has mentioned yet... - DRUMS
Some of these could weigh 60lbs and rotate at 3000rpm. A story that I heard (but could not verify) was that on one of these a bearing failed and the drum departed from the mechanism at speed and left a trail of destruction before it finally came to rest.
This happened with an US reconnaissance plane during flight. The equipment operators reportedly took refuge in the rear compartment, hoping that the bulkhead would hold.
The drum trashed most of the equipment before it came to rest. And it was probably a good thing that it didn't exit the airframe.