AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Engine Balancing and Resonance Vibration Problem          AirTalk.org Forum Index -> Owning Airplanes View previous topic :: View next topic   Author Message AllanFuller Guest Posted: Sun Sep 11, 2005 1:42 pm    Post subject: Engine Balancing and Resonance Vibration Problem Fly Wrote: Quote: You message suggests that the washers are bolted at the holes on the circumference of the ring gear. IIRC, your prop model has th extended hub. Extended hubs do not respond very well to balance correction a 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 o correction weight will be 30-50% more that if placed closer to the plane o 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 Kent, 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 b symmetric with bold holes. We will be checking the see if the rin gear has a preferred bolt hole orientation when the prop gets back fro the prop shop. I will post results of the prop shop findings and progress in solvin all vibration problems. Thank you and everyone’s comments. They have been most helpful as w move forward. Alla -- AllanFuller Back to top toecutter1962@yahoo.com Guest Posted: Sun Sep 11, 2005 11:51 pm    Post subject: Re: Engine Balancing and Resonance Vibration Problem On Sun, 11 Sep 2005 14:42:40 +0100, AllanFuller <AllanFuller.1v7clx (AT) news (DOT) aviationbanter.com> wrote: snip Quote: 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 Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AirTalk.org Forum Index -> Owning Airplanes All times are GMT Page 1 of 1   Jump to: Select a forum Aviation----------------alt.aviationAviation safety EnhancementPlanes, gliders and flying in AustraliaAviation et pilotage (Français)rec.aviationAviation (Aerobatics)Hot air, gas balloons and airshipsHang-gliding, paragliding, foot-launched flightAircraft Design & BuildingInstrument Flight RulesAviation (Classifieds)Military AircraftNaval AviationAviation (Miscellaneous Topics)Owning AirplanesAviators (General Discussions)Aviation related productsAircraft RestorationHelicopters and rotary wing aircraftsFlight SimulationSailplanesAviation (Students)Light aircraftFlying related activities in the UK Airports----------------alt.airportsEdinburgh Airport Glasgow Airport Humberside Airport Luton Airport Aberdeen Airport Glasgow Prestwick Airport  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.