From: owner-krnet-l-digest@teleport.com[SMTP:owner-krnet-l-digest@teleport.com] Sent: Thursday, November 06, 1997 8:08 AM To: krnet-l-digest@teleport.com Subject: krnet-l-digest V1 #160 krnet-l-digest Thursday, November 6 1997 Volume 01 : Number 160 ---------------------------------------------------------------------- Date: Thu, 06 Nov 1997 09:58:49 From: "Troy Johnson" Subject: KR: Models A little little late but had to put in my two cents. I too have been a modeler since I was very young. Started with plastic, progressed into rubber band "Comet" kits, skipped Control Line after watching dad and Grandpa try to kill the neighbors with a Cox Mustang, but not before starting the engine on mom's kitchen table. Had to include that traumatic experience! Progressed right into R/C and been doing that off and on for 15 years. So yes, my modeling experience is one of the things that sold me on the KR's. Materials that I am familiar with and the ability to add my own personal touches and modifications to the basic design, something I have always loved to do with my models. I think one of the neatest things about KR's is the fact that NO TWO ARE ALIKE! The RV's, Glasairs, Lancairs...etc...are beautiful, but they all look the same. Again, just had to add something..... ************************************************************* If at first you don't succeed.....so much for skydiving! Troy A. Johnson WYLE Electronics 1955 E. Sky Harbor Circle North Phoenix, AZ 85034 (602)-495-9953 (602)-416-2158 (direct) ************************************************************* ------------------------------ Date: Thu, 6 Nov 1997 10:02:56 -0600 From: "Hartman, Malcolm L (New Orleans JRB)" Subject: KR: RE: Steve's Wing Patrick, If you're concerned about the WAF gap on the standard KR wing, there is a way to strengthen that area. I used one long bolt through each pair of fittings with a 4130 steel spacer between them on the main spar. The steel strap WAF is standard construction on many aircraft with wood spars. M. Hartman/N926FW >---------- >From: Patrick Flowers[SMTP:patri63@ibm.net] >Sent: Thursday, November 06, 1997 9:37AM >To: krnet-l@teleport.com >Subject: KR: Steve's Wing > >Steven A Eberhart wrote: >> >> I am taking a completely different aproach to the removable wings. I >> have the plans for the Long EZ and really like the wing attach, carry >> through spar arangement. I have decided to go with the Rutan wing >> design. I am going to use the wing structure and carry through spar >> straight from the Long EZ plans. Same structure, shear web, and number >> of plies as the EZ. Just not sweeping the wing. This gives a place in >> front of the carry through spar for fuel and a complete trailing edge, not >> hampered with the stub wing, for flaps. The wings are still removable >> with three bolts per wing panel and can be easily rigged and de-rigged. > >Steve, > >That sounds great. I'm not familiar with the LongEZ, but I've got a >friend building a CozyIV - same construction technique. When I first >joined this list I inquired if anyone had tried a composite spar like >that. > >After reviewing my plans, I can say that the biggest concern I have is >the wing attachment. I know that there are plenty of KR's flying and >the wings aren't falling off, but using steel straps with that gap >between the spars is scary IMO. All homebuilts that I've seen under >construction before had spars that overlapped. I've considered building >a one-piece wing, but then you have the transportation/repair issues to >consider. > >I would be very interested in your progress. >Patrick >-- >Patrick Flowers >Mailto:patri63@ibm.net > ------------------------------ Date: Thu, 6 Nov 1997 10:05:16 -0600 (CST) From: Steven A Eberhart Subject: Re: KR: Steve's Wing Pat, I have the same concerns about the spar. I am also helping, when I can, on John Epplin's Cozy - helped do the spar caps - and liked the design of the wing. I am building a giant scale model of the KR-2S design with the modifications I am planning on incorporating on the full size plane. The wing construction is exactly straight from the Rutan Long EZ manual. The model is about 45% scale and is proving to be a great learning experience both in aircraft design and composite construction methods. When I get farther into the construction I will put some pictures on my web page. With the exception of scale you won't be able to tell any difference between the model and the full size wing from the pictures, everything is the same. I can't get started on my full size KR until spring so that played heavily in the decision to build the model. I wanted to start building something :-) The only other major changes I will be making to the KR-2S design will be widening the fuselage to 44" and lengthening the fuselage some more over the KR-2S stretch. Will also be using a stabilator similar to the Europa's instead of the standard KR-2S horiz. Stab. and elevator. On the model I am using 1/4" divinicell foam with a layer of BID on both sides for the fuselage construction. THe full size plane will have a standard spruce boat. Also using carbon fiber UNI for the spar caps on the model, because I have it, with the Rutan recommended 3" UNI tape for the full size wing. The model will be powered by a 62cc Zenoah 2 cycle engine that is the same engine that powers the 1/4 scale T-6 radio control racing models. To protect the innocent I have named the design "LS-3T Sky Terrier" Steve Eberhart newtech@newtech.com On Thu, 6 Nov 1997, Patrick Flowers wrote: > Steven A Eberhart wrote: > > > > I am taking a completely different aproach to the removable wings. I > > have the plans for the Long EZ and really like the wing attach, carry > > through spar arangement. I have decided to go with the Rutan wing > > design. I am going to use the wing structure and carry through spar > > straight from the Long EZ plans. Same structure, shear web, and number > > of plies as the EZ. Just not sweeping the wing. This gives a place in > > front of the carry through spar for fuel and a complete trailing edge, not > > hampered with the stub wing, for flaps. The wings are still removable > > with three bolts per wing panel and can be easily rigged and de-rigged. > > Steve, > > That sounds great. I'm not familiar with the LongEZ, but I've got a > friend building a CozyIV - same construction technique. When I first > joined this list I inquired if anyone had tried a composite spar like > that. > > After reviewing my plans, I can say that the biggest concern I have is > the wing attachment. I know that there are plenty of KR's flying and > the wings aren't falling off, but using steel straps with that gap > between the spars is scary IMO. All homebuilts that I've seen under > construction before had spars that overlapped. I've considered building > a one-piece wing, but then you have the transportation/repair issues to > consider. > > I would be very interested in your progress. > Patrick > -- > Patrick Flowers > Mailto:patri63@ibm.net > ------------------------------ End of krnet-l-digest V1 #160 *****************************