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Old 01-03-2018, 11:48 PM   #25
Twolunger
Why can't you anchor the landing gear to a picnic table and let the motors run so you can Check them? We used a hollow tube in the old days to hear engine noises. Today they have stethoscopes. I'd be careful about lubricating the motors. If they are brushless they may be either sealed, or shielded, with high temperature grease. Oil may dilute the grease and cause more problems.