I have heard that said but I wonder what level of vibration was assumed.
If I shock mount it and I use a smooth rotary engine does that still apply?
Obviously if it sits around on the shelf for five years that does not
hurt the bearings. Maybe we need to contact the manufacture and ask them
what level of vibration and frequency damages the bearings.


I just bought an electric BF Goodrich almost new on auction for $970.  (the guy has two more for sale if interested).  I posed a similar question on (ok to turn off) on the RV list and got several veament NO!!!'s  One guy (an A&P & EAA tech counselor etc... as nos) said to make sure that I turned it on and ran it every couple months until I was done with the plane.  He told me about a friend who failed to do this and his gyro had to be re-built.

Regards,
Dave Leonard

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