Original Posted By: "bender"
> Subject: Re: Pietenpol-List: Building my first wing rib - the journeybegins>> I mitered my rib pieces. If you make them like an assembly line it > doesn't take all that long if you have a power sander. I ended up with > all the individual rib pieces numbered and rubber banded together on my > workbench, so putting together a rib didn't take all that long, maybe an > hour to glue and nail one side. In the long run it doesn't cost much > more to build a Rolex. Its your time, so its up to you. I don't regret > it myself.>> Ben Charvet> Titusville, Fl> On 6/17/2011 8:17 AM, jarheadpilot82 wrote:> > --> Pietenpol-List message posted by:"jarheadpilot82"> >> > I am starting my first wing rib, and came across the following website-> >> >
http://www.2wings.com/m12/faq/wingfaq.h ... SH%20PLATE> >> > This website is, apparently, is a Builder's area for Pitts Model 12aircraft. In reading through I found interesting tidbits of information,but the following thread really caught my attention. I have cut and pastedit here to make it easier to read-> >> > "I re-read Cory's post, It does sound as though Cory is gluing thesticks together, then adding gussets to each side. This would indicatethat the sticks are custom miter fitted on each end, then glued. This isNOT required on any gussetted aircraft rib. (emphasis mine) The size ofthe gusset is engineered to have adequate shear glue strength to transferthe loads and more. I recommend that the sticks be cut as long as you canto fit the location with 90 deg cuts on the ends such that one corner ofthe end of the stick contacts the adjacent one. Factory Pitts, Stearman andStaggerwing ribs have no inter-stick contact in places relying on thegussets only. Just like the roof over your head. This can save bunch ofbuild time. Ribs built in this manner are still stronger than the requiredloads." (emphasis mine)> >> > I have three questions-> >> > 1. Really? Are 90 cuts on the ends of the braces sufficient overmitered ends? If that were true, it sure would save me time, but I alsoknow that the Internet is full of really bad ideas parading as "expertadvice". FWIW, I have built and glued my first rib with the vertical bracesmitered to probably within 1/16th. Am I in overkill, or doing what is theright way to construct?> >> > 2. I am thinking about building my wing ribs using Semi-Circle andQuarter-Circle gussets (I just like the look, although, once built andcovered, I won't see them again). Since they are not the original planstype of gusset, what size circle did some of you use for your gussets?> >> > 3. I heard the instructor in an EAA workshop I attended ask thequestion, "Are you building a Timex, or a Rolex?" The point I felt he wasmaking is that you can build and spend thousands of extra hours fittingtolerences that don't really make your aircraft any stronger, or you canbuild it using good practices and it will be just fine. That is not thesame as "The Fisherman" school of aircraft construction, but yet it is afar cry from building a fine Swiss watch either. I guess that I am askingfor words of advice in this regard as I begin building. Comments areappreciated.> >> > Thanks to everyone in advance for their advice. I count today in myBuilder's Log as the day I began building my Pietenpol. Everything up untilnow has been "research", and I don't think the FAA or anyone else gives twohoots about how many hours of research I did. They are more interested inwhat I built, how I built it, and (at least to me) how many hours I spentbuilding.> >> > --------> > Semper Fi,> >> > Terry> >> >> >> >> > Read this topic online here:> >> >
http://forums.matronics.com/viewtopic.p ... 267#343267> >> >> >> >> >> >> >> >> >> >> >>>> -- > Ben Charvet, PharmD> Staff Pharmacist> Parrish Medical center>________________________________________________________________________________Subject: Pietenpol-List: A engine