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Wing Spars- a comparison(non-scientific)

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ideaz1(at)sbcglobal.net
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Posted: Sun Nov 02, 2008 5:34 pm Post subject: Wing Spars- a comparison(non-scientific)

I have borrowed a set of drawings for the RV-6 and  compared the wing spar construction. Yes I know the RV is heavier etc., but...  the wing spars in the RV: 1. meet at the center of the fuselage 

 2. .040" main spar web and .040" doubler(spaced to  form a box type spar) 70" from center of fuse outward 

 3. spars boxed in w/ .040" (601 is  .032")

  4. spars held together w/ 1/4"x12"4130 steel  plates w/5bolts ea.side, top & bot. etc.

 This is just a cursory comparison but seeing the  differences really was an eye opener for me.

 I suspect this design is less than 10 lbs. extra  but sometimes it's worth it to have extra weight. I think sometimes we sacrifice  our safety just trying to lighten our planes to the extreem.

 I don't know where to go with this... I wouldn't  feel comfortable making changes to the 601 design since I'm not qualified,  but???

  

 Dirk

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