---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Tue 11/09/04: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:23 AM - Horizontal Stabilizer Ribs (Chenoweth) 2. 07:54 AM - Re: Horizontal Stabilizer Ribs (Michael T. Ice) 3. 08:27 AM - Re: Horizontal Stabilizer Ribs (Hebert, Richard) ________________________________ Message 1 _____________________________________ Time: 07:23:09 AM PST US From: "Chenoweth" Subject: RV9-List: Horizontal Stabilizer Ribs --> RV9-List message posted by: "Chenoweth" I just started the RV9 empennage kit and ran into a snag fitting the 904's to the front spar. While the three 1/8 pre-punched holes in the front flange of the ribs match the three corresponding ones in the spar the top and bottom 3/32 holes in the rib flange really dont' want to match their partners in the spar flange. I can get a cleco in them with a lot of bending and pushing but I'm concerned that when it's time to match drill the skin thru the spar and into the rib I'll end up with, at best, an oversized hole in the rib and, at worst, two holes in the front of each rib. Clearly there is something not bent correctly but I can't figure out what. This is my first metal airplane (currently I'm a Kitfox builder/flier) so I have virtually no background to draw on. Bill Chenoweth Albion, Maine ________________________________ Message 2 _____________________________________ Time: 07:54:54 AM PST US From: "Michael T. Ice" Subject: Re: RV9-List: Horizontal Stabilizer Ribs --> RV9-List message posted by: "Michael T. Ice" Bill, I just finished the HS about 3 weeks ago. You will run into all sorts of little problems like this. Pushing and bending is part of the process, with limitations of course. Did you "Flute" the ribs? Mike Ice Anchorage, Alaska RV-9 standard build, elevators ----- Original Message ----- From: "Chenoweth" Subject: RV9-List: Horizontal Stabilizer Ribs > --> RV9-List message posted by: "Chenoweth" > > I just started the RV9 empennage kit and ran into a snag fitting the 904's to the front spar. > > While the three 1/8 pre-punched holes in the front flange of the ribs match the three corresponding ones in the spar the top and bottom 3/32 holes in the rib flange really dont' want to match their partners in the spar flange. > > I can get a cleco in them with a lot of bending and pushing but I'm concerned that when it's time to match drill the skin thru the spar and into the rib I'll end up with, at best, an oversized hole in the rib and, at worst, two holes in the front of each rib. > > Clearly there is something not bent correctly but I can't figure out what. This is my first metal airplane (currently I'm a Kitfox builder/flier) so I have virtually no background to draw on. > > Bill Chenoweth > Albion, Maine > > ________________________________ Message 3 _____________________________________ Time: 08:27:14 AM PST US From: "Hebert, Richard" Subject: RE: RV9-List: Horizontal Stabilizer Ribs --> RV9-List message posted by: "Hebert, Richard" Hi Bill, We built the RV-9A empenage at the Alexander Technical Center in Griffin, GA and didn't have any problems getting the 904s to line up. You will have to drill the pre-punched wholes out with the appropriate drill bits and this should help to get the fit right. If the alignment is off significantly, you may need Van's to resend you replacement pieces. I've attached pictures of the front spar before and after riveting. Everything worked out as planned. Hope this helps....and happy building... Richard Hebert/Ray Abadie Atlanta GA RV-9A -----Original Message----- From: owner-rv9-list-server@matronics.com [mailto:owner-rv9-list-server@matronics.com]On Behalf Of Chenoweth Subject: RV9-List: Horizontal Stabilizer Ribs --> RV9-List message posted by: "Chenoweth" I just started the RV9 empennage kit and ran into a snag fitting the 904's to the front spar. While the three 1/8 pre-punched holes in the front flange of the ribs match the three corresponding ones in the spar the top and bottom 3/32 holes in the rib flange really dont' want to match their partners in the spar flange. I can get a cleco in them with a lot of bending and pushing but I'm concerned that when it's time to match drill the skin thru the spar and into the rib I'll end up with, at best, an oversized hole in the rib and, at worst, two holes in the front of each rib. Clearly there is something not bent correctly but I can't figure out what. This is my first metal airplane (currently I'm a Kitfox builder/flier) so I have virtually no background to draw on. Bill Chenoweth Albion, Maine