Folks I have the Dan Diehl brackets attached according to plan in my taildragger. I can assure you from personal experience that the legs will break before the spar and even so it takes a massive effort to achieve...like a stalled three point landing some ten feet up followed by three bounces and a busted prop. The KR spar is a bloody strong affair I can tell you. Your spine would snap before it does.
John The Martindale Family 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA phone: 61 2 66584767 email: johnja...@optusnet.com.au ----- Original Message ----- From: "Glynnis Young" <gyoungtra...@yahoo.co.uk> To: "KRnet" <kr...@mylist.net> Sent: Saturday, December 04, 2004 3:46 PM Subject: RE: KR> spars > It is not so much the strength of the WAF's that concerns me, it is > drilling all those holes in the spar (cap). Even the landing gear > mounts require holes drilled in the upper and lower spar cap ....... > > my intention is to add a wider pillar between the caps where the > undercarriage mounts, add a 2mm 4130 "back-plate" behind the spar - > then drill the mounting holes through the pillar - not the spar caps. This > way the legs are sort of clamped to the spar without any holes in the > load bearing caps - maybe even one size up on the ply web between the > legs (and the necessary precautions against stress risers). > > =========== > > Without any other deviation from the plans - this makes sense to me. One of the builders suggested that changes to spar were silly or even dangereous, I wonder if this change would be viewed in that way. > > Staples: > > I note that all builders remove the staples after the adhesive has cured, so they are really just there for a snug fit while the adhesive sets. If a satisfactory alternate method of clamping the parts together is avaiable, can I assume that the staples are not essential? > > Reason for asking - I plan to pre-bent the boat side-frame when the ply is bonded to the ladder so that there is less stress when the sides are assembled. This means clamping everything during the cure, so I will not have access to the ourside if I want to see glue join (on the inside) to make sure the clamping pressure is right all over. > > Thanks > G > > > > --------------------------------- > ALL-NEW Yahoo! Messenger - all new features - even more fun! > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > > please see other KRnet info at http://www.krnet.org/info.html
