I’m no engineer either, but I suspect the clamping force the WAF bolts provide may be relevant to the integrity/strength of the WAF joint. Lynch pins won’t provide any clamping force. They’d also need to be very precise - I doubt movement of the joint would be a recipe for safety or longevity.
TK On Mon, 14 Aug 2023 at 7:54 pm, Michael via KRnet <krnet@list.krnet.org> wrote: > Forgot to attach image of the type of pins I am refering to: > > [image: image.png] > [image: image.png] > > > https://www.globalspec.com/learnmore/building_construction/building_supplies/fasteners/hitch_pins_linch_pins > > Regards > שָׁלוֹם עֲלֵיכֶם (Shalom aleichem) > > Michael L Griffin > mileg...@gmail.com > Fax : 086 733 0650 > Cel : +27 83 462 0462 > Please consider the environment before printing this email > > He who play in root, > eventually kill tree. > > Linode Private Server :: http://goo.gl/OnpGMS > EvE Online 21day trial :: http://goo.gl/TAZSJ8 > > > On Mon, 14 Aug 2023 at 11:49, Michael <mileg...@gmail.com> wrote: > >> Greetings >> >> I have done some digging on the KR2 folding wings and while the actual >> folding mechanism is reasonably easy (See Philip's web link); the quick and >> *safe* detach and reattach the WAF bolts has been the challenge. True I >> can simply spend an age detaching and reattaching the wings and securing >> the WAF bolt's but to me, that defeats the purpose of folding wings. My >> use case is to trailer-hangar my KR2 (ZS-VVT) for ease of storage and >> potentially the flexibility of storing at home. >> >> I am no engineer so there may be a simple solution that I am unable to >> see. >> >> The 2 scenario's I have researched: >> >> 1) If it were possible to simply remove the lower WAF bolts (for example, >> a secure pin & cotter-pin like the KitFox and others) and rotate upwards >> that would be great. The challenge I am unable to overcome is the top >> forward and aft WAF's pivot angles do not align sufficiently to allow for a >> hinge motion. Tilting the spar's to align them may be an option to align >> the hinge movement but not feasible for exiting KR2's and I have no idea of >> what doing so will do to the design, performance and most importantly >> safety of the KR2. Tilting the spars is a radical deviation from the >> plans. Personally, tilting the spar is not viable. >> >> 2) A potentially more viable solution is replacing the WAF bolts with >> pins enabling you to rapidly remove all the WAF bolts, pull the wing out a >> little to clear the WAF brackets and rotate the wings up & backward (like >> Philip's Folding wing link shows). This would be ideal for trailering & >> reducing hangar space. The challenge I see is doing so without >> compromising safety. Replacing the WAF bolts with a hitch-pin and >> cotter-pin (lynch-pin?) combination for rapid attach & detach is very easy >> but doing so *without compromising integrity and safety* of the wing is >> paramount and where I ran afowl of my lack of expertise. >> >> If anyone has a solution, I would be most interested! >> >> Philip's link: http://www.philskr2.50megs.com/photo5.html >> >> Regards >> >> Michael L Griffin >> mileg...@gmail.com >> Fax : 086 733 0650 >> Cel : +27 83 462 0462 >> Please consider the environment before printing this email >> >> He who play in root, >> eventually kill tree. >> >> Linode Private Server :: http://goo.gl/OnpGMS >> EvE Online 21day trial :: http://goo.gl/TAZSJ8 >> >> >> On Tue, 8 Aug 2023 at 10:36, Phillip Matheson via KRnet < >> krnet@list.krnet.org> wrote: >> >>> Have a look on my wed page. At the top you will see a folding wing page >>> link. This is not a KR, but this aircraft used the same WAF >>> >>> http://www.philskr2.50megs.com/ >>> Hope this helps >>> Phil >>> >>> Sent from my iPhone >>> >>> On 7 Aug 2023, at 11:23, Ricardo Moura via KRnet <krnet@list.krnet.org> >>> wrote: >>> >>> >>> I am new to this group and this is my very first message. >>> >>> I live in the Greater Cleveland area, have always admired the KR-2 >>> design and, until now, it was out of my reach because my goal is to fly an >>> aircraft under the LSA rules. However, it seems like the rules are >>> broadening up, and now I can see a KR-2S in my future. >>> >>> I saw the post below by David Boyer (KR> Simply Folding Wing) and >>> noticed that the link to the pictures showing his solution is not available >>> anymore. >>> >>> Can anyone, please, share the pics showing the folding mechanism with me? >>> >>> Thanks and regards, >>> >>> Ricardo >>> >>> >>> >>> KR> Simply Folding Wing >>> David Boyer Tue Jun 21 16:42:55 2011 >>> >>> I have been talking with badbob0007 (Bob Johnson) and we both would >>> like the ability to fold our wings up and directly over the top of the >>> canopy for transport. >>> This is a basic idea on a double pivot design so the wing can have >>> enough clearance to fold. >>> >>> http://i1081.photobucket.com/albums/j354/davidpob/wing.jpg >>> >>> I hope this will be useful. Thanks David Boyer >>> -- >>> KRnet mailing list >>> KRnet@list.krnet.org >>> https://list.krnet.org/mailman/listinfo/krnet >>> >>> >>> -- >>> KRnet mailing list >>> KRnet@list.krnet.org >>> https://list.krnet.org/mailman/listinfo/krnet >>> >> -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet >
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