Don Reid wrote back in 2007 that the WAF bolts function better as a single bolt in double shear top & bottom (2 total) than 2 on each fitting, forward and aft, top & bottom (4 total). I know that KRs fly in both configurations. My KR used 4 per side when I got it and (partially based upon Don's well explained message) I have flown mine with 2 per side with a compression spacer between the inner WAF sides. None have come apart at this location that I am aware of anyway.
From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Flesner via KRnet Sent: Sunday, August 30, 2015 1:56 PM <snip> I'm not an engineer but the following from the web would indicate that the 3/8" bolts (4 / each main spar attach) are a great deal more than adequate for our application... <snip>
