Brodhead Pietenpol Association

Original Posted By: "John Hofmann"
Hi all!I hope John's pictures show a few "wilted" Piet folks!! Temp & humiditywere definitely up & little or no breeze thru the tent at night!Same conditions when I got home tonight -- only add a 15 mph south wind!!Mike C.Pretty Prairie, KS----- Original Message -----

Original Posted By: "Michael Conkling"
Subject: Pietenpol-List: The WingIn reply to some wing questions, here is some of the electronic notes I've kept when building my wing: The ribs will now be referred to as 'L1'- Left 1st rib. 'R1' - Right 1st rib. There are 14 ribs on each side. The center rib will be referred to as 'C'. Build the rib jig, so that the gussets and the upright x next to the spars, are spaced 28 1/16" to 28 1/8" apart, using 3/4" opening for the spar. This should be the exact dimention between the spars, with the exception of the 3 center ribs, and the outboard ribs (one each side) where the struts attach. These locations have 1/8" plywood doublers on each side of the 3/4" spar. These 5 ribs need a 1" opening. I installed my ribs in the plans locations. In the areas where the drag / anti-drag cables touched some of the ribs, I noched them a little, and added a 1/2 X 1/4 doubler on the other side, to regain the strength. I think there were 3 or 4 places. Leave the gussets off in 2 locations, on each rib. On the lower forward side of the front spar, and on the aft upper side of the aft spar. This would allow the ribs to slide on the spars much easier. Install these gussets after the ribs have been assembled to the spars. This will ensure a nice tight fit. Other gussets to be left off are on the ribs at the inboard aileron station. On this rib, leave the outboard (trailing edge) gusset off, for the later installation of the aileron blank plywood (1/16"). On my wing, in the center section of the wing, forward of the front spar, is designed so as to allow the top of the radiator to be within the wing. Two 1/8" plywood L.E. ribs, are spaced evenly between, and paralell to, R1 and L1. These ribs will accept the 1/16" plywood L.E. (on top), and the 1/32" plywood (within the radiator cavity). Hinges are numbered 1 thru 6, beginning on the left wing tip. Lots of places on the wing needed to be drilled using Granpap's hand crank drill (chordless !!), because of clearance reasons. Cable guide blocks were numbered 1 thru 8, starting at the top left. Jury strut center line is 37" outboard of center line of cabane strut attachments. I estimated the placement of the jury strut attachments by referring to the picture of the Pietenpol on the 1999 I A M Union Calender. The 1/8" Plywood doublers on the spars, located at the center section and the lift strut attachments, should have Spaded Ends (football shaped). These doublers bring the width of the spar to the plans width of 1", and allow the plans dimentions to be used for all the fittings. The ribs were weighted, without varnish, and the heaviest ones were installed inboard, progressively installing the lighter ones toward the wingips. The two inboard ribs are the only ones that are made out of Spruce, the rest of the ribs are made out of Western Cedar. LEFT SIDE RIGHT SIDE 1.) 7.24 oz Spruce 1.) 7.4 oz Spruce 2.) 7.8 oz All other ribs are Cedar 2.) 7.96 oz All other ribs are Cedar 3.) 7.91 oz 3.) 7.93 oz 4.) 7.5 oz 4.) 7.91 oz 5.) 6.58 oz 5.) 6.56 oz 6.) 7.94 oz 6.) 6.34 oz 7.) 6.4 oz 7.) 6.44 oz 8.) 7.93 oz 8.) 6.4 oz 9.) 6.44 oz 9.) 6.3 oz 10.) 6.34 oz 10.) 6.25 oz 11.) 6.29 oz 11.) 6.2 oz 12.) 6.22 oz 12.) 6.17 oz 13.) 6.15 oz 13.) 6.14 oz 14.) 6.1 oz 14.) 6.09 ozChuck GantzerWichita, KS"Everything should be made as simple as possible, but no simpler." ~~ Albert Einstein ~~________________________________________________________________________________