AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Chrome cylinder in radials          AirTalk.org Forum Index -> Aircraft Design & Building View previous topic :: View next topic   Author Message GTH Guest Posted: Fri Apr 20, 2007 10:23 pm    Post subject: Chrome cylinder in radials One of my buddies flies a radial powered vintage airplane. He says that all the radials he is aware of have one chrome cylinder corresponding to the master rod, and the rest straight cylinders. Anyone around has seen this, and has any info as to why it would be so ? Thanks in advance, Regards, Gilles Thesee http://contrails.free.fr Back to top Charles Vincent Guest Posted: Fri Apr 20, 2007 11:29 pm    Post subject: Re: Chrome cylinder in radials GTH wrote: Quote: One of my buddies flies a radial powered vintage airplane. He says that all the radials he is aware of have one chrome cylinder corresponding to the master rod, and the rest straight cylinders. Anyone around has seen this, and has any info as to why it would be so ? Thanks in advance, Regards, Gilles Thesee http://contrails.free.fr The cylinder associated with the master rod has additional sidewall loads due to the forces transmitted by the slave rods, so wear would be more of an issue on that cylinder. Quickly scanning the overhaul and parts manuals for Wright and P&W radial engines, there are no special procedures called out for the master cylinder, and no special part numbers, but my copies are vintage, i.e. they do not incorporate all of the bulletins, which I have largely on microfiche in storage. Charles Back to top Highflyer Guest Posted: Tue May 01, 2007 6:12 am    Post subject: Re: Chrome cylinder in radials "GTH" <Gilles.Thesee@ac-grenoble.fr> wrote in message news:4628f6d7$0$16435$426a74cc (AT) news (DOT) free.fr... Quote: One of my buddies flies a radial powered vintage airplane. He says that all the radials he is aware of have one chrome cylinder corresponding to the master rod, and the rest straight cylinders. Anyone around has seen this, and has any info as to why it would be so ? Thanks in advance, Regards, Gilles Thesee http://contrails.free.fr I have been flying and maintaining radial engines for over fifty years. I don't know of any that were built with a chrome cylinder for the master rod cylinder and plain steel for the others. Generally a chrome cylinder is a cylinder that has been worn beyond limits and then chromed back up. I don't know of any NEW cylinders that are made chromed. I may be wrong. If so, name me a maker who makes NEW chrome cylinders. There would be no reason for that in any case. On all the radial engines in my shop at the moment, ( about six I think ) all of the cylinders are steel. I recently overhauled the engine on the Red Lady. I figured she had about 2500 hours since the last overhaul, which was about thirty years ago. All nine cylinders miked up within NEW limits! I changed one cylinder because I had some good spares and the valve guide was wallowed a bit and it was easier to change the cylinder than press in a new valve guide insert. I will probably put a new valve guide in it and return it to my spare cylinder collection! :-) Highflyer Highflight Aviation Services Pinckneyville Airport ( PJY ) PS: The rec.aviation annual flyin at Pinckneyville is coming up soon. May 18, 19, and 20. Plan to attend now. There is a faq on the web at http://www.ousterhout.net/pjy-faq.html Anyone coming please let Mary know at jjohnson (AT) siu (DOT) edu since she is already buying the groceries and starting the prepwork for the meals. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AirTalk.org Forum Index -> Aircraft Design & Building 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.