Original Posted By: "Alan A. Laudani"
I am just starting to lay out my wing rib jig. I had a copy of the fullsize layout received from Don Pietenpol made. On my copy, the distancebetween the spars was 27.5 inches, not 27.75 as noted on the drawing. Also,the deflection on the lower edge was .5 inches, not .625 as shown on thedrawing. BEWARE OF USING PHOTOCOPIES ON SCALED DRAWINGS! This may becommon knowledge, but it was new to me.On a similar note, I measured the bottom deflection on the drawing receivedfrom Don Pietenpol. It is a maximum of 9/16, rather than 5/8 shown in thedrawings. Is this enough to make a difference, am I picking at nits, and canI use the original as the layout print for the rib jig? What is therequired accuracy of the airfoil? Words of knowledge will be greatlyappreciated.Al Swanson________________________________________________________________________________