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Thread Tools | Display Modes |
#11
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#12
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You message suggests that the washers are bolted at the holes on the
circumference of the ring gear. IIRC, your prop model has the extended hub. Extended hubs do not respond very well to balance correction at the ring gear because the plane of correction is not close to the plane of imbalnce. Sure, a balance can be achieved but the amount of correction weight will be 30-50% more that if placed closer to the plane of imbalance. After the prop is installed again, the final dynamic balance should be checked above 2300 rpm. 2000 rpm readings are not valid. Kent Felkins |
#13
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The balancing washers were bolted on to the bulkhead not the ring gear. The ring gear has nothing bolded on it. The ring gear appears to be symmetric with bold holes. We will be checking the see if the ring gear has a preferred bolt hole orientation when the prop gets back from the prop shop. I will post results of the prop shop findings and progress in solving all vibration problems. Thank you and everyone’s comments. They have been most helpful as we move forward. Allan |
#14
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On Sun, 11 Sep 2005 14:42:40 +0100, AllanFuller
wrote: snip The balancing washers were bolted on to the bulkhead not the ring gear. The ring gear has nothing bolded on it. The ring gear appears to be symmetric with bold holes. We will be checking the see if the ring gear has a preferred bolt hole orientation when the prop gets back from the prop shop. The ring gear support is "symmetric" with regard to the bolt holes (technically, they are nut holes...). But, one hole should have a slightly larger ID to match a corresponding nut pressed in the crank flange with a slightly larger OD. The other clue for proper orientation are the timing marks on the ring gear support. I would hope that the person/s that are maintaining your aircraft are aware of this. TC snip |
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