---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Fri 10/20/06: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:58 AM - Re: Wing skin oil-canning (Chenoweth) 2. 07:44 AM - Re: Wing skin oil-canning (Norman Younie) 3. 12:43 PM - Re: Wing skin oil-canning (Chenoweth) 4. 02:30 PM - Re: Wing skin oil-canning (dfischer@iserv.net) 5. 04:59 PM - Re: Wing skin oil-canning (Michael Ice) ________________________________ Message 1 _____________________________________ Time: 04:58:31 AM PST US From: "Chenoweth" Subject: Re: RV9-List: Wing skin oil-canning Doug, I don't have anything to add to what you've gotten from this and the RV list. But, here's a bit of warning about what may be a common oil can problem with the fuselage. The bay between bulkheads 707 and 708 on my 9 was really very bad - lots of slack in the skin. My RV7A (flying) neighbor has the same problem. He's living with his (I gather it's quite startling when it oil cans in flight). I asked Van's about putting a J stringer in. They said no problem and that I didn't have to attach it to the bulkheads. Someone on the List cautioned about cracking skin if the stiffener wasn't tied to the bulkheads so I did that. I put in two due to the difficulty of getting one in the exact middle. Problem solved. Bill Albion, Maine About to rivet center section to tail cone. ----- Original Message ----- From: Doug Fischer To: RV-9 Matronics List ; RV Matronics List Sent: Tuesday, October 17, 2006 11:21 PM Subject: RV9-List: Wing skin oil-canning I just finished riveting on the top LH wing skins and I noticed one of the "squares" was indented and would "oil can" when pushed from the inside. The square is bounded by two ribs (the fourth and fifth from the tip), the forward spar, and the "J"stringer. It is the fourth bay inboard from the tip (RV-9). All other skin "squares" are tight/neutral. Any ideas (other than drilling out every rivet in the skin) to address this issue? I was thinking of drilling out the rivets around the square to allow the skin to average out between three squares and re-rivet. Just wanted to see if anyone else has run into this problem and worked out a solution. Other than this the skin is perfect (well, pretty good at least). Thanks in advance for the help! Doug Fischer Jenison, MI RV-9A Wings do not archive ________________________________ Message 2 _____________________________________ Time: 07:44:11 AM PST US From: Norman Younie Subject: Re: RV9-List: Wing skin oil-canning One thing that you do not want to do while riveting skins on is to use an incandescent trouble light. The heat generated from the light bulb is enough to expand the skin and this too can cause a loose skin. Found this out a few planes ago. Chenoweth wrote: > Doug, > I don't have anything to add to what you've gotten from this and the > RV list. But, here's a bit of warning about what may be a common oil > can problem with the fuselage. The bay between bulkheads 707 and 708 > on my 9 was really very bad - lots of slack in the skin. My RV7A > (flying) neighbor has the same problem. He's living with his (I > gather it's quite startling when it oil cans in flight). I asked > Van's about putting a J stringer in. They said no problem and that I > didn't have to attach it to the bulkheads. Someone on the List > cautioned about cracking skin if the stiffener wasn't tied to the > bulkheads so I did that. I put in two due to the difficulty of > getting one in the exact middle. Problem solved. > Bill > Albion, Maine > About to rivet center section to tail cone. > > ----- Original Message ----- > *From:* Doug Fischer > *To:* RV-9 Matronics List ; RV > Matronics List > *Sent:* Tuesday, October 17, 2006 11:21 PM > *Subject:* RV9-List: Wing skin oil-canning > > I just finished riveting on the top LH wing skins and I noticed > one of the > "squares" was indented and would "oil can" when pushed from the > inside. > The square is bounded by two ribs (the fourth and fifth from the > tip), the > forward spar, and the "J"stringer. It is the fourth bay inboard > from the > tip (RV-9). All other skin "squares" are tight/neutral. Any > ideas (other > than drilling out every rivet in the skin) to address this issue? > I was > thinking of drilling out the rivets around the square to allow the > skin to > average out between three squares and re-rivet. Just wanted to > see if > anyone else has run into this problem and worked out a solution. > Other > than this the skin is perfect (well, pretty good at least). > Thanks in > advance for the help! > > Doug Fischer > Jenison, MI > RV-9A Wings > do not archive > > * > > href="http://www.matronics.com/Navigator?RV9-List">http://www.matronics.com/Navigator?RV9-List > > * > > * > > > * > > ________________________________ Message 3 _____________________________________ Time: 12:43:18 PM PST US From: "Chenoweth" Subject: Re: RV9-List: Wing skin oil-canning I don't remember if I used my incandescent or my fluorescent (which actually generates a surprising amount of heat) but it might well have been the root of my problem. Thanks for the tip. Bill ----- Original Message ----- From: Norman Younie To: rv9-list@matronics.com Sent: Friday, October 20, 2006 10:43 AM Subject: Re: RV9-List: Wing skin oil-canning One thing that you do not want to do while riveting skins on is to use an incandescent trouble light. The heat generated from the light bulb is enough to expand the skin and this too can cause a loose skin. Found this out a few planes ago. Chenoweth wrote: Doug, I don't have anything to add to what you've gotten from this and the RV list. But, here's a bit of warning about what may be a common oil can problem with the fuselage. The bay between bulkheads 707 and 708 on my 9 was really very bad - lots of slack in the skin. My RV7A (flying) neighbor has the same problem. He's living with his (I gather it's quite startling when it oil cans in flight). I asked Van's about putting a J stringer in. They said no problem and that I didn't have to attach it to the bulkheads. Someone on the List cautioned about cracking skin if the stiffener wasn't tied to the bulkheads so I did that. I put in two due to the difficulty of getting one in the exact middle. Problem solved. Bill Albion, Maine About to rivet center section to tail cone. ----- Original Message ----- From: Doug Fischer To: RV-9 Matronics List ; RV Matronics List Sent: Tuesday, October 17, 2006 11:21 PM Subject: RV9-List: Wing skin oil-canning I just finished riveting on the top LH wing skins and I noticed one of the "squares" was indented and would "oil can" when pushed from the inside. The square is bounded by two ribs (the fourth and fifth from the tip), the forward spar, and the "J"stringer. It is the fourth bay inboard from the tip (RV-9). All other skin "squares" are tight/neutral. Any ideas (other than drilling out every rivet in the skin) to address this issue? I was thinking of drilling out the rivets around the square to allow the skin to average out between three squares and re-rivet. Just wanted to see if anyone else has run into this problem and worked out a solution. Other than this the skin is perfect (well, pretty good at least). Thanks in advance for the help! Doug Fischer Jenison, MI RV-9A Wings do not archive href="http://www.matronics.com/Navigator?RV9-List">http://www.matronics .com/Navigator?RV9-List ________________________________ Message 4 _____________________________________ Time: 02:30:05 PM PST US Subject: Re: RV9-List: Wing skin oil-canning From: dfischer@iserv.net --> RV9-List message posted by: dfischer@iserv.net > Definitely not the issue here - All the lighting in the build area is flourescent. Do not archive I don't remember if I used my incandescent or my fluorescent (which > actually generates a surprising amount of heat) but it might well have > been the root of my problem. > Thanks for the tip. > Bill > ----- Original Message ----- > From: Norman Younie > To: rv9-list@matronics.com > Sent: Friday, October 20, 2006 10:43 AM > Subject: Re: RV9-List: Wing skin oil-canning > > > One thing that you do not want to do while riveting skins on is to use > an incandescent trouble light. The heat generated from the light bulb is > enough to expand the skin and this too can cause a loose skin. Found > this out a few planes ago. > > Chenoweth wrote: > Doug, > I don't have anything to add to what you've gotten from this and the > RV list. But, here's a bit of warning about what may be a common oil > can problem with the fuselage. The bay between bulkheads 707 and 708 > on my 9 was really very bad - lots of slack in the skin. My RV7A > (flying) neighbor has the same problem. He's living with his (I > gather it's quite startling when it oil cans in flight). I asked > Van's about putting a J stringer in. They said no problem and that I > didn't have to attach it to the bulkheads. Someone on the List > cautioned about cracking skin if the stiffener wasn't tied to the > bulkheads so I did that. I put in two due to the difficulty of > getting one in the exact middle. Problem solved. > Bill > Albion, Maine > About to rivet center section to tail cone. > ----- Original Message ----- > From: Doug Fischer > To: RV-9 Matronics List ; RV Matronics List > Sent: Tuesday, October 17, 2006 11:21 PM > Subject: RV9-List: Wing skin oil-canning > > > I just finished riveting on the top LH wing skins and I noticed one > of the > "squares" was indented and would "oil can" when pushed from the > inside. > The square is bounded by two ribs (the fourth and fifth from the > tip), the > forward spar, and the "J"stringer. It is the fourth bay inboard > from the > tip (RV-9). All other skin "squares" are tight/neutral. Any ideas > (other > than drilling out every rivet in the skin) to address this issue? I > was > thinking of drilling out the rivets around the square to allow the > skin to > average out between three squares and re-rivet. Just wanted to see > if > anyone else has run into this problem and worked out a solution. > Other > than this the skin is perfect (well, pretty good at least). Thanks > in > advance for the help! > > Doug Fischer > Jenison, MI > RV-9A Wings > do not archive > > > href="http://www.matronics.com/Navigator?RV9-List">http://www.matronics.com/Navigator?RV9-List > > ________________________________ Message 5 _____________________________________ Time: 04:59:26 PM PST US From: Michael Ice Subject: Re: RV9-List: Wing skin oil-canning --> RV9-List message posted by: Michael Ice Hi, Don't drill out the oil can skin, you are likely to do more damage than good. I have heard of some folks just pro-sealing in some J-stringers where the oil canning takes place. Mike Ice Electrical RV-9 Anchorage, Alaska ----- Original Message ----- From: dfischer@iserv.net Subject: Re: RV9-List: Wing skin oil-canning > --> RV9-List message posted by: dfischer@iserv.net > > > Definitely not the issue here - All the lighting in the build > area is > flourescent. > > Do not archive > > > I don't remember if I used my incandescent or my fluorescent (which > > actually generates a surprising amount of heat) but it might > well have > > been the root of my problem. > > Thanks for the tip. > > Bill > > ----- Original Message ----- > > From: Norman Younie > > To: rv9-list@matronics.com > > Sent: Friday, October 20, 2006 10:43 AM > > Subject: Re: RV9-List: Wing skin oil-canning > > > > > > One thing that you do not want to do while riveting skins on > is to use > > an incandescent trouble light. The heat generated from the light > bulb is > > enough to expand the skin and this too can cause a loose skin. Found > > this out a few planes ago. > > > > Chenoweth wrote: > > Doug, > > I don't have anything to add to what you've gotten from this > and the > > RV list. But, here's a bit of warning about what may be a > common oil > > can problem with the fuselage. The bay between bulkheads 707 > and 708 > > on my 9 was really very bad - lots of slack in the skin. My RV7A > > (flying) neighbor has the same problem. He's living with his (I > > gather it's quite startling when it oil cans in flight). I asked > > Van's about putting a J stringer in. They said no problem and > that I > > didn't have to attach it to the bulkheads. Someone on the List > > cautioned about cracking skin if the stiffener wasn't tied to the > > bulkheads so I did that. I put in two due to the difficulty of > > getting one in the exact middle. Problem solved. > > Bill > > Albion, Maine > > About to rivet center section to tail cone. > > ----- Original Message ----- > > From: Doug Fischer > > To: RV-9 Matronics List ; RV Matronics List > > Sent: Tuesday, October 17, 2006 11:21 PM > > Subject: RV9-List: Wing skin oil-canning > > > > > > I just finished riveting on the top LH wing skins and I > noticed one > > of the > > "squares" was indented and would "oil can" when pushed > from the > > inside. > > The square is bounded by two ribs (the fourth and fifth > from the > > tip), the > > forward spar, and the "J"stringer. It is the fourth bay > inboard> from the > > tip (RV-9). All other skin "squares" are tight/neutral. > Any ideas > > (other > > than drilling out every rivet in the skin) to address this > issue? I > > was > > thinking of drilling out the rivets around the square to > allow the > > skin to > > average out between three squares and re-rivet. Just > wanted to see > > if > > anyone else has run into this problem and worked out a > solution.> Other > > than this the skin is perfect (well, pretty good at > least). Thanks > > in > > advance for the help! > > > > Doug Fischer > > Jenison, MI > > RV-9A Wings > > do not archive > > > > > > > > href="http://www.matronics.com/Navigator?RV9- > List">http://www.matronics.com/Navigator?RV9-List > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >