---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Mon 02/11/13: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:04 AM - Re: Blown out Wheel pant (bill.peyton) 2. 06:59 AM - Re: Re: Blown out Wheel pant (Seano) 3. 05:54 PM - Re: Re: Rough engine (Chris) 4. 06:12 PM - Re: Re: Rough engine (Linn) 5. 06:12 PM - Re: Re: Rough engine (Danny Riggs) 6. 06:56 PM - Placement and dimensions of access door for HW ER tanks (Duane Wilson) ________________________________ Message 1 _____________________________________ Time: 05:04:42 AM PST US Subject: RV10-List: Re: Blown out Wheel pant From: "bill.peyton" Sean, You don't happen to have a photo of your stiffeners do you? Bill -------- Bill WA0SYV Aviation Partners, LLC Read this topic online here: http://forums.matronics.com/viewtopic.php?p=394033#394033 ________________________________ Message 2 _____________________________________ Time: 06:59:01 AM PST US From: "Seano" Subject: Re: RV10-List: Re: Blown out Wheel pant I've had a lot of requests to take a picture next time my pants are off ;) No seriously I'll get one next time. ----- Original Message ----- From: "bill.peyton" Sent: Monday, February 11, 2013 6:03 AM Subject: RV10-List: Re: Blown out Wheel pant > > Sean, > You don't happen to have a photo of your stiffeners do you? > Bill > > -------- > Bill > WA0SYV > Aviation Partners, LLC > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=394033#394033 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 05:54:06 PM PST US From: "Chris" Subject: RE: RV10-List: Re: Rough engine I am glad to hear a root cause was identified and a safe landing was made. This incident raised a curiosity in me regards to the safety wire. I have checked my bolts in the last 50 hours and they are fine. They have safety wire on them but when I removed the safety wire to remove the plate the bolts were torqued and had plenty of break away torque. So the safety wire in theory was not "doing anything". Question is are we suffering from an inappropriate or non-existent torque value or the need for an initial torque and then a follow-on torque at some period? The idea being that a proper assembly procedure will never require the services of the safety wire (although it would always be safetied). -Chris N919AR -----Original Message----- From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Leeverett Sent: Sunday, February 10, 2013 8:12 PM Subject: RV10-List: Re: Rough engine I have a diagnosis for rough engine. I had flown the plane for 10 trouble free hours. In the pattern the throttle stuck half open. I advanced full throttle and it ran smoothly. About 10 seconds later the engine started running rough. I landed uneventfully. Mag check rough on both mags. Throttle action smooth. I did a compression check today. Cylinders 23456 all 76/80 or better. When I removed plug from #1 the electrode was severely damaged. Unable to get any compression. I removed the filter air box and found one of the 4 bolts that holds the box to the servo missing. The bolt heads were not drilled and I did not safety wire them. I don't know it the instructions say to or not. So my diagnosis (as a physician I can tell you that is half the cure) is that the bolt vibrated loose then stuck in the throttle valve. When I advanced the throttle the bolt went up the induction , past the intake valve and into the cylinder where it did its damage. Obviously I will replace/ safety the bolts, remove and inspect/replace piston, cylinder, valves rods etc. I will also scope the other cylinders. So I hope everyone has safeties the bolts. Leon Everett Read this topic online here: http://forums.matronics.com/viewtopic.php?p=394012#394012 ________________________________ Message 4 _____________________________________ Time: 06:12:25 PM PST US From: Linn Subject: Re: RV10-List: Re: Rough engine On 2/11/2013 8:53 PM, Chris wrote: > > I am glad to hear a root cause was identified and a safe landing was made. > > This incident raised a curiosity in me regards to the safety wire. I have > checked my bolts in the last 50 hours and they are fine. They have safety > wire on them but when I removed the safety wire to remove the plate the > bolts were torqued and had plenty of break away torque. So the safety wire > in theory was not "doing anything". Well, maybe it was. Safetied properly the bolt will not loosen due to vibration. In the absence of safety wire ..... all bets are off. I don't want to be the one to research the law of averages .... > Question is are we suffering from an inappropriate or non-existent torque > value or the need for an initial torque and then a follow-on torque at some > period? The idea being that a proper assembly procedure will never require > the services of the safety wire (although it would always be safetied). Proper assembly requires proper torque and safety wire if there's any way the parts being clamped can be worn or squished in operation. If you absolutely don't want stuff to come apart ... use the safety wire. All those nutplates or safety nuts you installed .... are subject to fastener loosening due to vibration. Another good reason to have your engine dynamically balanced. Linn > -Chris > > N919AR ________________________________ Message 5 _____________________________________ Time: 06:12:25 PM PST US From: Danny Riggs Subject: RE: RV10-List: Re: Rough engine After seeing what one small bolt did to Leon's #1 cylinder I will make sure that all my bolts within the airflow to the engine are safety wired and no t rely on torque or torque seal to maintain the bolt grip. There is a lot o f vibration on these engines and over a period of time it could loosen the fillings in your mouth! :-) > From: toaster73@embarqmail.com > To: rv10-list@matronics.com > Subject: RE: RV10-List: Re: Rough engine > Date: Mon=2C 11 Feb 2013 20:53:19 -0500 > > > I am glad to hear a root cause was identified and a safe landing was made . > > This incident raised a curiosity in me regards to the safety wire. I have > checked my bolts in the last 50 hours and they are fine. They have safety > wire on them but when I removed the safety wire to remove the plate the > bolts were torqued and had plenty of break away torque. So the safety wir e > in theory was not "doing anything". > Question is are we suffering from an inappropriate or non-existent torque > value or the need for an initial torque and then a follow-on torque at so me > period? The idea being that a proper assembly procedure will never requir e > the services of the safety wire (although it would always be safetied). > -Chris > > N919AR > > -----Original Message----- > From: owner-rv10-list-server@matronics.com > [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Leeverett > Sent: Sunday=2C February 10=2C 2013 8:12 PM > To: rv10-list@matronics.com > Subject: RV10-List: Re: Rough engine > > > I have a diagnosis for rough engine. I had flown the plane for 10 troubl e > free hours. In the pattern the throttle stuck half open. I advanced full > throttle and it ran smoothly. About 10 seconds later the engine started > running rough. I landed uneventfully. Mag check rough on both mags. Throt tle > action smooth. I did a compression check today. Cylinders 23456 all > 76/80 or better. When I removed plug from #1 the electrode was severely > damaged. Unable to get any compression. I removed the filter air box and > found one of the 4 bolts that holds the box to the servo missing. The bol t > heads were not drilled and I did not safety wire them. I don't know it th e > instructions say to or not. So my diagnosis (as a physician I can tell yo u > that is half the cure) is that the bolt vibrated loose then stuck in the > throttle valve. > When I advanced the throttle the bolt went up the induction =2C past the > intake valve and into the cylinder where it did its damage. Obviously I w ill > replace/ safety the bolts=2C remove and inspect/replace piston=2C cylinde r=2C > valves rods etc. I will also scope the other cylinders. So I hope everyon e > has safeties the bolts. > Leon Everett > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=394012#394012 > > > > > > > > > > > =========== =========== =========== =========== > > > ________________________________ Message 6 _____________________________________ Time: 06:56:30 PM PST US From: Duane Wilson Subject: RV10-List: Placement and dimensions of access door for HW ER tanks I need some dimensions for the access door in each wingtip for the Hotel-Whiskey extended range tanks. The wings are 250 miles away, but the wing tips are on the table in front of me. I marked the center of the fill cap position on the external surface of the wingtip, but did not mark the outboard edge of the tank on the external surface. Does anyone have access to the measurement from the outboard rib to the outboard edge of the ER tank? Or, even easier, what is the distance from the edge of the top aluminum skin to the outboard edge of the access door? Thanks dwilson ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv10-list Browse Digests http://www.matronics.com/digest/rv10-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.