Original Posted By: John E Fay
Hello gentlemen:Over the past few years I have had the pleasure of being involved heavillyin the Sun N Fun Woodworking workshops. Our overall Workshop Director isVictor Boyce of Lakeland FloridaVictor is a long time expert in aircraft repair, maintenance, andconstruction. Holds many certificates and acts as the US rep for the CorbyStarlett. Builds laminated spars for Starlett builders. Glue expert.Vic has been kind enough to share his knowledge with hundreds (probablythousands) of people literally worldwide over the last 3 decades.This last Sun N Fun allowed Vic to demonstrate and teach several workshopvolunteers and visitors the ins and outs of splicing, scarfing, andlaminating wooden structural parts as well as wing spars.So I had the chance to pick his brain for several days on the techniques forsplicing spars, etc.I only am jumping into this thread to encourage anybody looking at splicing(or laminating) a spar to do some serious research. I just got off thephone with Vic to confirm what my memory told me. And I asked him whatspecific sources are pertinent to this topic. FAA document AC43-13-1b andan old Wood Aircraft Inspection and Fabrication Document - ANC 19 have somespecific slope (runout) requirements for splices. That is 1:15 minimum forspars (and recommended 1:20 !). Now there is some old info still floatingaround (ie; the EAA Aircraft Building techniques - WOOD ) (page 86 ) shows adiagram that allows a slope of 1:10 as a minimum) IF you use gussetts. Page53 shows a 1:16 runout. So there is conflicting information out there.This is not to throw rocks at peoples' wings they have already built. Ijust want people to realize there IS some real information and there AREexperts out there that may be able to help builders who want to researchfurther. If any body has questions or wants to discuss this, feel free tocontact me and I will relay Vic's E-Mail address or telephone number so youcan contact him. He has said he would be glad to discuss spar constructionwith anybody on this group with a question.Just Meddling....Bert912-246-1389bconoly(at)surfsouth.com________________________________________________________________________________Date: Thu, 18 May 2000 22:13:39 -0500Subject: Pietenpol-List: Jim V. spar splice