Original Posted By: Michael D Cuy
What is an appropriate method to break a wing rib?I built one tonight using stables to hold the gussets on. When I removed itfrom the jig, I found that there was not enough strength in the stapledjoints to keep the rib in shape. Basically, things were shifting andtwisting. From here on out I will go back to letting the rib cure in thejig. The rib tonight will be scrap, and I would like to bust it.I have had the best results from gluing all of the rib and gussets togetherat one time. Basically, putting a set of gussets into the jig, then all therib sticks, then the other set of gussets. When I put one of the 3 inchsplit PVC clamps on each gusset everything is held firmly. After cure, therib is removed, and everything looks really good. If I don't use that muchpressure, sometimes a stick will not be seated fully, and the gusset willnot have good contact with all of the mating sticks. I am concerned that Imight be putting too much pressure on the T88 and be starving the joint.I tried a rib with Resorcinol so as to not have the pressure concern. Itworked OK, but the T88 made a better looking rib (gap filling).Any insight would be appreciated.Regards-Norm Muzzy________________________________________________________________________________Date: Thu, 24 Feb 2005 08:26:42 -0500
Pietenpol-List: RE: Testing a rib
RE: Pietenpol-List: RE: Testing a rib
Original Posted By: "Phillips, Jack"
Re: Pietenpol-List: Testing a rib
Original Posted By: "Hodgson, Mark O"
RE: Pietenpol-List: Testing a rib
Original Posted By: "Textor, Jack"
Re: Pietenpol-List: Testing a rib
Original Posted By: Jimmy Courtney
RE: Pietenpol-List: Testing a rib
Original Posted By: Rcaprd(at)aol.com
Jack-I will test a couple ribs, basically the ones that don't match up with theothers, or that I don't want to use for whatever reason.The inspectors don't care about testing or anything like that. It doesn'thurt anything, but they are really only interested in making sure that youmeet the minimum requirements, that the workmanship looks adequate, and thatthe paperwork is correct. This is my 2nd plane, so I have been thorugh theinspection process once (a couple times if you count helping others withtheir inspections). So long as the Des Moines FSDO is doing it, no bigdeal. Just make sure the plane is safe.Put 1.3 hours on the Cozy this afternoon. Seems strange to be building aplane that tops out at about the same speed where my first plane rotates.How far along are you? Des Moines, right? I have a source for wire wheelshere that looks interesting. They make their own hobs and lace them up withmoped rims. I don't know if the rims are heavy enough or not, but my guessis that they will probably work fine.-NormSounds like a good system Norm. You do a "test" with each rib? Is thatsomething the feds want?Jack Textor________________________________________________________________________________
Jack-I will test a couple ribs, basically the ones that don't match up with theothers, or that I don't want to use for whatever reason.The inspectors don't care about testing or anything like that. It doesn'thurt anything, but they are really only interested in making sure that youmeet the minimum requirements, that the workmanship looks adequate, and thatthe paperwork is correct. This is my 2nd plane, so I have been thorugh theinspection process once (a couple times if you count helping others withtheir inspections). So long as the Des Moines FSDO is doing it, no bigdeal. Just make sure the plane is safe.Put 1.3 hours on the Cozy this afternoon. Seems strange to be building aplane that tops out at about the same speed where my first plane rotates.How far along are you? Des Moines, right? I have a source for wire wheelshere that looks interesting. They make their own hobs and lace them up withmoped rims. I don't know if the rims are heavy enough or not, but my guessis that they will probably work fine.-NormSounds like a good system Norm. You do a "test" with each rib? Is thatsomething the feds want?Jack Textor________________________________________________________________________________