Brodhead Pietenpol Association

Original Posted By: Domenico Bellissimo
I have read two books so far about building wooden airplanes, one from 1936 and one from 1947 (cause thats all that the Portland Public Library has! I will, as $ allows, get a couple from the EAA), and they have two different views about building wing ribs. One says to draw the rib from the plans, using measurements from the datum, etc... and the other says, if possible, build the gig right on the full-size plan from the manufacturer (or designer). How many of you build right on Bernie's full size plan and how many draw the whole thing out from the (scaled) plans?Many thanks!Richard-----------------------------http://www.wrld.com/w3builderPietenpols, Electronic Music,Website Design, Stompilation________________________________________________________________________________

Original Posted By: Steve Eldredge
Richard DeCosta wrote:> > I have read two books so far about building wooden airplanes, one> from 1936 and one from 1947 (cause thats all that the Portland Public> Library has! I will, as $ allows, get a couple from the EAA), and> they have two different views about building wing ribs. One says to> draw the rib from the plans, using measurements from the datum,> etc... and the other says, if possible, build the gig right on the> full-size plan from the manufacturer (or designer).> > How many of you build right on Bernie's full size plan and how many> draw the whole thing out from the (scaled) plans?> > Many thanks!> > Richard> -----------------------------> http://www.wrld.com/w3builder> Pietenpols, Electronic Music,> Website Design, StompilationI didn't get a full size dwg. so I scaled mine up. It wasn't difficultat all. There were one or two mistakes in the dwg. that will be quiteevident when you draw to full scale. You can blend it in correctly withno problem.Domenic________________________________________________________________________________

Original Posted By: "Warren D. Shoun"
Richard DeCosta wrote:> I have read two books so far about building wooden airplanes, one> from 1936 and one from 1947 (cause thats all that the Portland Public> Library has! I will, as $ allows, get a couple from the EAA), and> they have two different views about building wing ribs. One says to> draw the rib from the plans, using measurements from the datum,> etc... and the other says, if possible, build the gig right on the> full-size plan from the manufacturer (or designer).>> How many of you build right on Bernie's full size plan and how many> draw the whole thing out from the (scaled) plans?>> Many thanks!>> Richard> --------I built mine from the plans measurements plotted on to a piece ofparticle board.Plot the pointsusing a flexible straight edge; loft the pointsusing cheap wood of the same demensions as the rib members (1/2x1/4")nail rib members into place.Nail guide blocks surrounding the rib mockup.remove and discard mockup pieces.hot wax the jig.drill holes for clamps and holes at rib member intersections so you cantap the rib out of the jig after nailing one side.Stevee________________________________________________________________________________

Original Posted By: Bobby White
Dear Richard: I would suggest that you at least take 3 measurements on thefull-size rib from the plans and see if they are close enough for you asto matching tolerances. On my copy at least, I decided to go ahead anddo a full measurement layout. For grins and giggles, I took this to one of the old time mentors atFlabob airport, known far and wide for his expertise. At first he justlaughed and suggested, tongue in cheek, that at these burning speeds of70 mph I should be so picky, picky, picky??? Well, I decided to be picky, picky, picky anyway, and I do feelbetter, and that's the truth.Warren________________________________________________________________________________

Original Posted By: "Warren D. Shoun"
Richard- I built a rib jig then before gluing any thing togetherstretched out a length of Saran wrap over the whole thing. Itkeeps your jig clean and the ribs come out very easily. Mike C. ________________________________________________________________________________

Original Posted By: michael list
Hi Mike: I appreciate your comments. From the pictures, your project is oneof the highest quality work products to be seen. Please keep yourdetails and pointers coming. Thanks. Warren.________________________________________________________________________________