From: owner-krnet-l-digest@teleport.com[SMTP:owner-krnet-l-digest@teleport.com] Sent: Saturday, June 13, 1998 3:24 PM To: krnet-l-digest@teleport.com Subject: krnet-l-digest V2 #94 krnet-l-digest Saturday, June 13 1998 Volume 02 : Number 094 ---------------------------------------------------------------------- Date: Thu, 11 Jun 1998 08:37:50 -0400 From: Donald Reid Subject: Re: KR: Supersonic Prop Tips Donald Reid wrote: > > Tom Andersen wrote: > > > > Hi KRNetters, > > Does anyone know whether the speed of sound goes up or down at higher > > altitudes, like about 8,000' MSL? > > Sonic velocity decreases with a decrease in pressure and density. At > altitude, the speed of sound is lower. Since I posted the last, I looked up the following: altitude (ft) sonic velocity (mph, approximate) 0 760 5000 748 10,000 734 20,000 707 It doesn't change very fast. Impact on prop tips will be minimal at the kind of altitude that we fly at. Related aviation trivia: I remember that the U2 spy plane flys so high that the stall speed is very close to the cruise speed which is very close to the sonic speed, which it can not exceed. - -- Don Reid Bumpass, Va. mailto:donreid@erols.com KR2XL at http://www.erols.com/donreid/kr_page.htm Ultralights at http://www.erols.com/donreid/usua250.html ------------------------------ Date: Thu, 11 Jun 1998 07:11:45 EDT From: KR2616TJ@aol.com Subject: KR: Flip Cradle-Mims. Mike, what did you use to attach the outer panels to the frame with? Also did you get an answer to your wire question? If you didn't I'll pull my sch. Dana Overall Richmond, KY mailto:kr2616tj@aol.com http://www.geocities.com/CapeCanaveral/Hangar/7085/ ------------------------------ Date: Mon, 11 Jun 2001 07:20:16 -0700 From: Micheal Mims Subject: Re: KR: Flip Cradle-Mims. KR2616TJ@aol.com wrote: > > Mike, what did you use to attach the outer panels to the frame with? Also did > you get an answer to your wire question? If you didn't I'll pull my sch. > No hits on the wire question yet. I plan to use aircraft wire but I don't know if that makes a difference?! Told you I was electrically impaired! So any and all help is welcome. :o) On the roll-o-matic, first I cut two 2x4s that were long enough to keep the top of the canopy from hitting the ground when inverted. I then bolt them to the motor mount holes. I cut two half circles out of 5/8s or thicker particle board and used about 5 sheet rock screws per side to screw them to the 2x4s. I cut two extra braces out of some 2 inch stock I had laying around and used the same sheet rock screws to attach them. It seems to be sturdy enough to hold my fat cow of an airplane when its standing on its nose. If you build one make sure the half circle pieces are attached as wide as possible. Otherwise it gets a little squirrely when on its nose. ------------------------------ Date: Thu, 11 Jun 1998 10:47:29 -0400 From: "Griffing, Bruce F (CRD)" Subject: RE: KR: Flip Cradle-Mims. Mike- On the question of wire type. There are at least three things to consider. Wire guage, insulation type and construction. On the wire guage, you can look in a wire table, but the short answer is as follows. In bundles, the maximum current per wire (copper) is 5a for 22ga, 7.5a for 20ga, 10a for 18ga, 13a for 16ga, 17a for 14ga and 23a for 12 ga. The ratings for a single wire in free air are higher but I would not use those numbers. As far as insulation type is concerned, you want something with a high temperature rating - the stuff rated for underhood use in a car should be fine. Finally, I would use stranded wire instead of solid. Stranded wire will stand more flexing, vibration, etc. Bruce > ---------- > From: Micheal Mims[SMTP:mikemims@pacbell.net] > Sent: Monday, June 11, 2001 10:20 AM > To: krnet-l@teleport.com > Subject: Re: KR: Flip Cradle-Mims. > > KR2616TJ@aol.com wrote: > > > > Mike, what did you use to attach the outer panels to the frame with? Also did > > you get an answer to your wire question? If you didn't I'll pull my sch. > > > > No hits on the wire question yet. I plan to use aircraft wire but I > don't know if that makes a difference?! Told you I was electrically > impaired! So any and all help is welcome. :o) > > On the roll-o-matic, first I cut two 2x4s that were long enough to keep > the top of the canopy from hitting the ground when inverted. I then > bolt them to the motor mount holes. I cut two half circles out of 5/8s > or thicker particle board and used about 5 sheet rock screws per side to > screw them to the 2x4s. I cut two extra braces out of some 2 inch stock > I had laying around and used the same sheet rock screws to attach them. > It seems to be sturdy enough to hold my fat cow of an airplane when its > standing on its nose. If you build one make sure the half circle pieces > are attached as wide as possible. Otherwise it gets a little squirrely > when on its nose. > ------------------------------ Date: Thu, 11 Jun 1998 08:29:50 -0400 From: Donald Reid Subject: Re: KR: airfoil drawing aabbcc01@infonie.fr wrote: > > hi, > > i feel the RAF48 airfoil drawn inside the plan of kr2s is very poor quality > that decided me to make a new RAF48 airfoil drawing. > but i'm not satisfied because i don't get a harmonius shape specially > around the place of trailing edge. > i will want to know if ever it's normal or if there's some people can tell > me how to get a perfect drawing of this airfoil. > > > thank you > Check the following web site. The last time I looked, they had about 1500 different airfoil coordinates. The only thing wrong with them is that they don't have the performance data (lift, drag, pitch moment, etc.) http://opus.aae.uiuc.edu/~selig/ads/coord_database.html - -- Don Reid Bumpass, Va. mailto:donreid@erols.com KR2XL at http://www.erols.com/donreid/kr_page.htm Ultralights at http://www.erols.com/donreid/usua250.html ------------------------------ Date: Thu, 11 Jun 1998 10:58:24 -0500 From: "Mark Langford" Subject: KR: RAF airfoil drawing > i feel the RAF48 airfoil drawn inside the plan of kr2s is > very poor quality I agree with you assessment of the airfoil plot in the plans. They were obviously done in a hurry by somebody with a french curve. I obtained the coordinates from an old newsletter. They were a little sparse, so I came up with another set from the EAA information center. Even the EAA's were obviously wrong, as one of the points had a decimal point in the wrong place resulting in quite a "whoop tee do" at the bottom of the trailing edge. I had an aero engineer run it through some sort of interpolation that yielded a higher resolution set of points. Both of these are located at http://fly.hiwaay.net/~langford/kraf48.html. You could use a spline or probably even a french curve if you were careful and the high resolution points to create a pretty good plot. Mark Langford mailto:langford@hiwaay.net KR2S project at http://home.hiwaay.net/~langford > -----Original Message----- > From: owner-krnet-l@teleport.com [mailto:owner-krnet-l@teleport.com]On > Behalf Of aabbcc01@infonie.fr > Sent: Wednesday, June 10, 1998 4:11 PM > To: krnet-l@teleport.com > Subject: KR: airfoil drawing > > > > > hi, > > i feel the RAF48 airfoil drawn inside the plan of kr2s is > very poor quality > that decided me to make a new RAF48 airfoil drawing. > but i'm not satisfied because i don't get a harmonius shape specially > around the place of trailing edge. > i will want to know if ever it's normal or if there's some > people can tell > me how to get a perfect drawing of this airfoil. > > > thank you > > > ------------------------------ Date: Thu, 11 Jun 1998 12:51:45 EDT From: BSHADR@aol.com Subject: Re: KR: Supersonic Prop Tips In a message dated 98-06-11 09:29:08 EDT, Don R. wrote: << Related aviation trivia: I remember that the U2 spy plane flys so high that the stall speed is very close to the cruise speed which is very close to the sonic speed, which it can not exceed. >> Don: I too recall the trivia about the U2 "cruise/operational" speed window at altitude. I think it was something like 3-5 mph! If true, that sure would keep the 'ol pucker meter pegged...no time to get bored. Randy Stein ------------------------------ Date: Thu, 11 Jun 1998 10:08:50 PDT From: "Richard Parker" Subject: KR: Re: KR wire >> Mike, what did you use to attach the outer panels to the frame with? Also did >> you get an answer to your wire question? If you didn't I'll pull my sch. I havent forgotten about you. I'm still working on finding the wire gauge chart. I know I have one somewhere I just cant find it. Its probably in an old textbook in the attic. Richard E. Parker Jaffrey, NH richontheroad@hotmail.com http://top.monad.net/~theparkers/kr.htm ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ------------------------------ Date: Thu, 11 Jun 1998 14:45:11 -0400 From: Tom Andersen Subject: Re: KR: RAF airfoil drawing Mark, Where on the KR-2S airfoil plot are the critical deviations from the EAA's RAF 48 airfoil plot? I hope not at the trailing edge. Is it worth checking out? - -Tom Mark Langford wrote: > > i feel the RAF48 airfoil drawn inside the plan of kr2s is > > very poor quality > > I agree with you assessment of the airfoil plot in the plans. They were > obviously done in a hurry by somebody with a french curve. I obtained the > coordinates from an old newsletter. They were a little sparse, so I came up > with another set from the EAA information center. Even the EAA's were > obviously wrong, as one of the points had a decimal point in the wrong place > resulting in quite a "whoop tee do" at the bottom of the trailing edge. I > had an aero engineer run it through some sort of interpolation that yielded > a higher resolution set of points. Both of these are located at > http://fly.hiwaay.net/~langford/kraf48.html. You could use a spline or > probably even a french curve if you were careful and the high resolution > points to create a pretty good plot. > > Mark Langford > mailto:langford@hiwaay.net > KR2S project at http://home.hiwaay.net/~langford > > > -----Original Message----- > > From: owner-krnet-l@teleport.com [mailto:owner-krnet-l@teleport.com]On > > Behalf Of aabbcc01@infonie.fr > > Sent: Wednesday, June 10, 1998 4:11 PM > > To: krnet-l@teleport.com > > Subject: KR: airfoil drawing > > > > > > > > > > hi, > > > > i feel the RAF48 airfoil drawn inside the plan of kr2s is > > very poor quality > > that decided me to make a new RAF48 airfoil drawing. > > but i'm not satisfied because i don't get a harmonius shape specially > > around the place of trailing edge. > > i will want to know if ever it's normal or if there's some > > people can tell > > me how to get a perfect drawing of this airfoil. > > > > > > thank you > > > > > > ------------------------------ Date: Thu, 11 Jun 1998 14:35:44 -0500 From: "Mark Langford" Subject: RE: KR: RAF airfoil drawing Tom Andersen wrote: > Where on the KR-2S airfoil plot are the critical deviations from > the EAA's RAF > 48 airfoil plot? I hope not at the trailing edge. Is it worth > checking out? I didn't get a set of "KR2S" airfoil plots when I ordered mine, just a sheet from the KR2 with airfoil plots on it. I think that's what's still being shipped, but I could be wrong. There's no error in the coordinates or the airfoil, it just looks a little discontinuous, but like Mike said, it probably doesn't matter much in the big picture anyway. The EAA's numbers were wrong on the next to the last point at the lower trailing edge. The .06 should be .60, but it had a couple of extra points that were left off of the newsletter reprint. I don't have a clue where the coordinates came from on the RR plots... Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Thu, 11 Jun 1998 19:37:22 -0500 From: "Mark Langford" Subject: KR: wire size chart WireHeads, At a recent EAA meeting one of our members gave a talk on aircraft wiring, and handed out a chart on wire size. I retyped it tonight (html takes up a whole lot less space than a scanned image, and is far easier to read) and throw it out there for your edification at http://home.hiwaay.net/~langford/wiresize.html. I'll try to do a little research on what electrical items require what size breaker. I know there are a few good clues on the expbus page. I'll dig that up and report back... Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Thu, 11 Jun 1998 21:06:00 -0500 From: "Mark Langford" Subject: KR: breaker sizes BreakerHeads, From the EXPBUS website at http://www.controlvision.com/EXPBUS.HTM: There should be a clue here somewhere, but of course using the rated current capacities would be a good place to start, I'll bet... - --------------------------------- Maximum Current Capacity 40 Amps Bus Voltage 14 (28Volts opt) Keep-alive output 1 (3 amps -- not switched) Master Outputs 2 (always on with master) 1 Five amp 1 Seven amp 3 Three Amp outputs Switched Outputs: 6 (High quality toggle switches included) Master Switch Alternator Field 5 amps Avionics Master Beacon/Strobe 7 amps Nav Lights 7 amps Aux. Pump 7 amps LDG/Taxi 9 amps LDG/Taxi 9 amps (9 amp circuit for a std 4509 lamp) The above current ratings are based on "recommended" operating current. Traditional fuses and circuit breakers are rated in terms of "maximum" operating current. A 9 amp polyfuse circuit is roughly comparable to a 14 amp fuse or breaker. For a small additional charge, we can configure your board with any size (1 to 9 amps) breakers in any position. The above configuration is a very good match for most sport aircraft, your project will probably work well with this configuration. - -------------------------------------------------- Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Thu, 11 Jun 1998 19:00:57 -0700 From: Micheal Mims Subject: Re: KR: wire size chart At 07:37 PM 6/11/98 -0500, you wrote: >WireHeads, > I retyped it tonight (html takes up a whole lot less space than a scanned image, and is far easier to read)>>> Mark thanks for that post! Now at the chance I am the only one on the list that doesn't understand the chart here is what I make of it. Across the top you have the wire gauge size, down the left side you have the maximum amps allowed if the wire is X feet long. Is this correct? So if I am using 20 gauge wire I can 3.3 amps through it as long as the wire is not longer than 15 feet? Somebody help me here, I told you the only thing I know about electricity is it shocks me sometimes! :o) zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 714.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Thu, 11 Jun 1998 21:40:52 -0500 From: "Mark Langford" Subject: RE: KR: wire size chart >So if I am using 20 > gauge wire I can 3.3 amps through it as long as the wire is not > longer than > 15 feet? Yep, just make sure you count both trips to the device. 7.5 feet each way, counting the ground. Maybe there was supposed to be a space after the wire size line... Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Thu, 11 Jun 1998 23:10:48 EDT From: HAshraf@aol.com Subject: KR: Power and signal Wire/Wood storage I would highly recommend teflon coated wire. It is very abrasion resistance and the melting point of insulation is quite high. Solder will melt before the insulation will so it cannot be damaged by soldering. For heat shrink application, Kynar is reconmmended. I just got some spruce from Wicks. Are there any special precautions I should take for storage. I live 1/2 miles from the sea. Haris ------------------------------ Date: Fri, 12 Jun 1998 12:27:17 -0700 From: MARVIN MCCOY Subject: Re: KR: Power and signal Wire/Wood storage HAshraf@aol.com wrote: > > > > I just got some spruce from Wicks. Are there any special precautions I should > take for storage. I live 1/2 miles from the sea. > > Haris - ---------------------- I would paint the ends of each piece with varnish to seal it and keep it from splitting. Also, when you stack if in your shop, make sure you stack it straight so it is not sagging between stickers. That way it will remain straight. Your stickers should be thick enough so your wood will not get wet if your shop gets flooded some how. Marvin McCoy Seattle, WA. North end of Boeing field mr.marvin@worldnet.att.net - ----------------- ------------------------------ Date: Fri, 12 Jun 98 04:21:27 CST From: "dboll" Subject: KR: kr parts update Hi KR builders and friends Thanks to John Bouyia all my kr parts are now in Oregon and a all wood = single place Bi -- plane is on the way.The reason for the change of direction is in part due= the fact that there just isn't any krs in ND and I feel alone building one without any local = support. I have been to Perry and Lake Land and Osh Kosh and met a lot of you builders and alw= as come away on a high and the net is great . I'm a member of a ultra-light group and = we have a great time with monthly meetings and fly ins. just can't spread myself any thin= ner so I will stay with that type of aircraft. I feel the kr is a wonderful plane but with = lack of a place to fly and the commaradry of other builders I will move on. I have build a fisher 303 a kolb Firestar and rebuild a J3 cub. I love building and look= forward to my new Fisher Youngster. I will use my Revmaster in it and am looking forward = to four cyle power. If any of my kr friends want to contact me I'm at dboll@ndak.net = . I will remember the good times I had with Marv and Angela, Marty .Gean John J. and all = that have shared info on the net and in person. Best wishes to all Don ------------------------------ Date: Fri, 12 Jun 1998 17:04:06 PDT From: "Oscar Zuniga" Subject: KR: Aerolite vs T-88 ? Mike wrote: >I will stick with an EPOXY >based system because it is strong, fuel proof and easy to work with. >Your results may vary! > Well, I don't know enough about adhesives to know what type of stuff looks white when it's dry (some of the squeeze-out), but the KR that I saw here in Medford that had gotten wet had framing that you could grab with your hand and just 'pop' off. The adhesive was either not applied properly in the first place, or was not waterproof. Having seen the workmanship on that plane, I wouldn't doubt that a non-structural glue (kid-safe kindergarten glue?) had been used. But I would add 'waterproof' to the list of things I would look for in an adhesive. Is that asking too much? Oscar Zuniga Medford, Oregon ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ------------------------------ Date: Fri, 12 Jun 1998 17:56:55 -0700 From: Micheal Mims Subject: Re: KR: Aerolite vs T-88 ? At 05:04 PM 6/12/98 PDT, you wrote: > But I would add 'waterproof' to the list of things I would look for in an adhesive. Is that asking too much? > >Oscar Zuniga Man,...I would think being water-proof would be a given! If someone is building an airplane with glue that's not water-proof I am sure we will read about it someday. zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Fri, 12 Jun 1998 20:10:24 -0700 From: Micheal Mims Subject: KR: New Pics at SWAG NetHeads, check out SWAGs Geo powered VaryEZ! Its pretty cool and that motor should fit in a KR as well. http://www.flash.net/~swagaero/veze/ zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Micheal Mims SP290,.. Filling and sanding now! mailto:mikemims@pacbell.net http://www.geocities.com/CapeCanaveral/Hangar/4136/ Irvine Ca Fax 949.856.9417 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------ Date: Fri, 12 Jun 1998 23:47:02 -0500 From: "Dean R. Collette, MD" Subject: KR: Composite Tail spring? Netters, The other day I was flipping through one of the back issues of Sport Av. (2/97) and ran across a picture of "the first KR built in Germany." The builder said that he used a composite tailwheel spring. Does anyone know any more details about this? Dean mailto:drdean@execpc.com ------------------------------ Date: Wed, 10 Jun 1998 21:31:38 -0800 From: "Parley T. Byington" Subject: Re: KR: Supersonic Prop Tips It is true! ------------------------------ Date: Wed, 10 Jun 1998 22:00:12 -0800 From: "Parley T. Byington" Subject: Re: KR: Re: highway landing Len Check the CHT probes by immersing them in a can of oil along with a candy thermometer. Heat the can of oil and note the readings on the candy thermometer and compare it to the readings on the CHT gauge. If yours was like mine it will be as much as 50 degrees F high. This will let you know if the problem is truly a overheat or just an instrumentation problem. Hope it helps Parley On 9 Jun 98 at 10:26, Len Marinaccio wrote: On Sun, 7 Jun 1998, Micheal Mims wrote: > .... my next hanger neighbor flew his Dragonfly for the > first time this morning ... > ....he said it flew great, hands off and the engine ran fine (except for > a little high CHT)! A friend of mine reported the same CHT problem with his Dragonfly (in fact, he grounded it for that reason). Any ideas why? Len (Trying to decide on a Dragonfly or a KR) ------------------------------ Date: Sat, 13 Jun 1998 06:16:19 -0700 From: Tom Crawford Subject: KR: Alt. Noise. GONE! Just a quick note to let you know I finally got rid of the alternator noise. I found a filter at Rodeo Snack that worked. It's a "heavy duty automotive electrical noise filter". Cat. #270-055. $19.95 plus tax. Tom Crawford tomc@afn.org Gainesville, FL N262TC ------------------------------ Date: Sat, 13 Jun 1998 08:51:58 EDT From: KR2616TJ@aol.com Subject: Re: KR: Composite Tail spring? In a message dated 98-06-13 00:38:25 EDT, you write: << The builder said that he used a composite tailwheel spring. Does anyone know any more details about this? Dean >> Somewhere out there someone is supposed to have a mold that has been passed around. Anybody know who is "it" in the composite tailspring tag game? Dean, I've experimented with this by rolling 9oz. cloth while leaving the core hollow and I haven't broke the thing yet. If I get time this weekend I'll move to my next experiment and bolt it too a 2 X 4 and give it a good whack and let you know. Dana Overall Richmond, KY mailto:kr2616tj@aol.com http://www.geocities.com/CapeCanaveral/Hangar/7085/ ------------------------------ Date: Sat, 13 Jun 1998 07:10:07 -0600 From: Ron Lee Subject: Re: KR: New Pics at SWAG If you look closely at the cowling (in the rear for you people with engines on the wrong end), you will see a HUGE cowling where it should be small...near the prop hub/reduction drive unit. Yepper the engine may work but it sure dictates an ugly and possibly aerodynamically unclean cowling. Ron Lee At 08:10 PM 6/12/98 -0700, you wrote: >NetHeads, check out SWAGs Geo powered VaryEZ! Its pretty cool and that >motor should fit in a KR as well. > >http://www.flash.net/~swagaero/veze/ >zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz >Micheal Mims >SP290,.. Filling and sanding now! >mailto:mikemims@pacbell.net >http://www.geocities.com/CapeCanaveral/Hangar/4136/ >Irvine Ca >Fax 949.856.9417 >^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > ------------------------------ Date: Sat, 13 Jun 1998 13:38:51 -0500 From: "Mark Langford" Subject: KR: project update N56ML KRNetHeads, I just updated my web page http://home.hiwaay.net/~langford/kmarkl.html to show (in excruciating detail) how I glassed my stub wings. Most of these pictures were made last night, but the last few I made out in the driveway a few minutes ago. I've decided to rename my web page to "KR2S Online Construction Manual" since that's what it seems to have turned into. Next, the outboard wings... Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Sat, 13 Jun 1998 12:31:45 -0700 From: Ross Youngblood Subject: Re: KR: Fuel Pump. I'm thinking of putting mine inside the cockpit area, simply since I have already plumbed the gascolator on the firewall... - -- Ross KR2616TJ@aol.com wrote: > I'm getting ready to permanently attach my header tank fuel pump. I've seen > it go both ways, on the inside of the firewall and firewall forward. What are > the advantages, or disadvantages, of the two installations. Opinions > anyone.......? > > Dana Overall > Richmond, KY > mailto:kr2616tj@aol.com > http://www.geocities.com/CapeCanaveral/Hangar/7085/ ------------------------------ Date: Sat, 13 Jun 1998 12:33:57 -0700 From: Ross Youngblood Subject: KR: Epoxies I have been using HEXCEL structural adheasive. I think at one time it was cheaper than T-88, but it is similar in many ways to T-88. Everything wood on my project, and a gate outside in my yard, have been assembled with HEXCEL structural adheasive. I have also found that it works great at permanently attaching tools to particleboard workbenches too! - -- Ross Genseric@aol.com wrote: > I know what you mean there. It seems as if I always have a few projects going > on at once. This is what I've wanted to build for years, but I'll prabably be > spending a lot of time waiting to aford more materials and tool. At least I > can make money with my other hobbies to put towards the plane. > > Say, what sort of epoxies is every one using? Should I just go with what Rand > Robinson is selling, or is there other structural epoxies that will work just > as well? I know I can Get West System localy here. > > Ben Raby > Minnesota ------------------------------ Date: Sat, 13 Jun 1998 12:42:08 -0700 From: Ross Youngblood Subject: Re: KR: Alternator noise Bobby, You can fuse either side of it, however, I would probably fuse the side connected to your +12V bus, in case the short is to the case or mounting bracket. Bobby Muse wrote: > At 11:22 AM 6/4/98 -0400, you wrote: > >Bobby- > > Since you like the capacitor solution I suggest that you > >put a fuse in series with it. That won't add much weight. > > Bruce > > > > > > Sounds like a reasonable idea. But which side of the capacitor needs to be > fused. > > Bobby Muse(N122B) > mailto:bmuse@mindspring.com > Wimberly, TX ------------------------------ Date: Sat, 13 Jun 1998 12:48:43 -0700 From: Ross Youngblood Subject: KR: What is the KR Digest? Bobby Muse wrote: > >>Hello Brian > >> > >>I take the KR digest so I can't post directly. > > What is the KR digest? > The KR digest is kind of like getting KRNET in the Costcobulk package size. All of the posts to KRNET are archived, and whenthe size of the package reaches 40K, members of the digest get a post. This happens from once every week to once every two days or so. You recieve a lot fewer emails. Back issues of all the digests for 1997 are available at John Bouyea's KR archive site, and digests for 1998 can be emailed to you directly if you ask majordomo nicely. We will also place all the digests on CD-ROM this year for contributors to KRNET as your humble admin just purchased a CD-Rom writer, these won't be ready for a while so hang on. I also try to move KRNET-L members to KRNET-L-DIGESET when I find that their email inbox is full and messages start bouncing. I can't tell this for all members, those members whos mail gets returned as no-such address, just get dropped from the list. If you want to join the digest, you can email majordomo to subscribe, or email me at mailto:krnet@krnet.org or rossy@teleport.com, and I will get to it within a week. (I don't check my teleport email daily any more... too much else to do.) - -- Regards Ross ------------------------------ Date: Sat, 13 Jun 1998 12:59:40 -0700 From: Ross Youngblood Subject: Re: KR: Re: highway landing Micheal Mims wrote: > At 05:30 AM 6/7/98 PDT, you wrote: > >Did they let him take off from the highway? > > A friend of mine dead sticked his Dragonfly onto a highway here in > California after his VW crank broke and his prop departed to parts unknown. > The highway patrol officer was such a *&^% that he gave him multiple moving > violations, one which was operating an unregistered motor vehicle on a > public highway. Sometimes cops can be so understanding eh? > I can see it now."Can I see your license and proof of registration please?" - -- Ross ------------------------------ Date: Sat, 13 Jun 1998 22:13:42 +0200 From: aabbcc01@infonie.fr Subject: KR: kr2 new airfoil hi kr netter's I had a glance to the site of university of illinois about the new AS 5045 airfoil and i saw that the globally performances are better then the RAF 48 ------------------------------ Date: Sat, 13 Jun 1998 13:17:44 -0700 From: Ross Youngblood Subject: Re: KR: Carbon Fiber Dean R. Collette, MD wrote: > Netters, > Did I miss something? During the last couple of weeks I have heard a couple > of folks mention using carbon fiber on the wings. (Mark's website update for > one.) Is this a single layer of carbon over the fiberglass or are we talking > about a totally carbon wing. > > Mark - you talk about the carbon in case someone steps on the wing stub. > Does a single layer do the trick; what about kevlar? > > Dean > mailto:drdean@execpc.com I think Kevlar would be good choice, except I read that most resins compatable with Kevlar have poor dis-similar bonding characteristics. However, Aeropoxy wets Kevlar fine, and I think it bonds to wood well. My comments on Kevlar are that it is hard to cut. Also many have mentioned that it wicks moisture, but I'm thinking that if it is encapsulated in resin, this should not be an issue. The big jets that had problems were seeing moisture wick up, then freeze, causing de-laminations. Carbon Fiber looks interesting, but I think it is a bit more brittle. I think it would be fun to experiment with these materials though, but I'm not sure I would play with my wings first. -- Ross ------------------------------ Date: Sat, 13 Jun 1998 13:31:23 -0700 From: Ross Youngblood Subject: Re: KR: Wire Size Mike, I don't think you will find this in the plans anyplace. (Well there is a schematic somewhere). You need to base the wire gage on the current draw. I ended up buying various lengths and gagues mil-spec wire for my project in the following gagues, here are my approximates (I don't have the project handy to look at.) 10 - Battery/Alternator CKT about 5-10' 12 - Battery/Alternator CKT about 5-10' 14 - Master/Starter Relays (or was it 12 GA?) 10-20' 16 - High current stuff... Electronic Ign 25' 18 - More general purpose 50-100' 20 - More general purpose 50-100' 22 - More general purpose 50-100' 24 - Radios/Xponder Encoder wiring. 50-100' I think I had planned 18GA or 20GA wire for my radio, only to discover that Terra recommended 22 or 24 gague. It turned out that this stuff fit the DB-25 connector better, than the big stuff anyway. I think my construction log at the airport has the gagues current carrying capacity, which was in a back issue of Kitplanes. RST had a series of articles on this, and one had the table in it. I don't have the exact gagues, and in my case, I erred on the side of caution and went with the larger gague for a particular application, I have the exact gagues and current loads projected in my construction log, and I will post later this weekend. -- Ross Micheal Mims wrote: > Electric Heads: I know I should check the plans first but thought I > would ask just in case this info isn't covered in the plans. What gauge > wire should I plan to use for the following: > > Radio > > Nav Lights > > Strobe Lights > > Landing Lights (auto driving lights) > > Instrument Post lights > > Thanks! ------------------------------ Date: Sat, 13 Jun 1998 23:15:21 +0200 From: aabbcc01@infonie.fr Subject: KR: kr2 new airfoil hi kr netter's I had a glance to the site of university of illinois about the new AS 5045 airfoil and i saw that the globally performances are better then the RAF 48 I would like to know if ever somebody know how to find the coordinates of this new airfoil and what kind of modification must be make to the spars and if ever the incidence angle relative to fuselage must be change or not for to be sure to fly with the fuselage at horizontal level at max cruise speed . i will be enjoy if ever someone want answer to my request. THANKS. ------------------------------ Date: Sat, 13 Jun 1998 17:25:17 EDT From: JEHayward@aol.com Subject: Re: KR: Re: highway landing In a message dated 6/13/98 2:02:33 PM Mountain Daylight Time, rossy@teleport.com writes: << The highway patrol officer was such a *&^% that he gave him multiple moving > violations, one which was operating an unregistered motor vehicle on a > public highway. Sometimes cops can be so understanding eh? >> I thought I read in one of the flying magazines in the past year or so that "landing on a road or highway is legal as long as you're not an impediment to traffic". Hmmm, an experimental aircraft is a motor vehicle of sorts and I'm pretty sure it would be registered...... Jim Hayward Rapid City, SD ------------------------------ Date: Sat, 13 Jun 1998 16:46:40 -0500 (CDT) From: Steven A Eberhart Subject: Re: KR: kr2 new airfoil On Sat, 13 Jun 1998 aabbcc01@infonie.fr wrote: > hi kr netter's > > I had a glance to the site of university of illinois about the new AS 5045 > airfoil and i saw that the globally performances are better then the RAF 48 > I would like to know if ever somebody know how to find the coordinates of > this new airfoil and what kind of modification must be make to the spars > and if ever the incidence angle relative to fuselage must be change or not > for to be sure to fly with the fuselage at horizontal level at max cruise > speed . > i will be enjoy if ever someone want answer to my request. > You can visit the NLF page http://www.newtech.com/nlf for some info about the project. You can also visit Mark Langford's page http://home.hiwaay.net/~langford/kmarkl.html which is detailing the construction of his KR-2S using the AS5046 airfoil. Basically, a group of us on KRNet subsidized the development of the AS504x family of airfoils. I built the wind tunnel models for the AS5045 and AS5048 airfoils and they were tested in U of I's wind tunnel two weeks ago. Ashok, the A in AS5045, has been too buisy to get the final reports published but the airfoils performed very well. The coordinates haven't been published pending the first flight of Troy Petteway's KR-2 which has been re-winged with the AS5046 16% airfoil. Troy is expecting the first flight on the new airfoil to take place late this month. After review of Troy's flight performance the airfoil coordinates will be placed in the public domain by the University of Illinois for use by anyone. Steve Eberhart - ------------------------------------- http://www.newtech.com/nlf One test is worth a thousand expert opinions but a thousand opinions are easier to get. ------------------------------ Date: Sat, 13 Jun 1998 16:59:47 -0500 From: "Mark Langford" Subject: KR: RE: kr2 new airfoil aabbcc01 wrote: > I had a glance to the site of university of illinois about the new AS 5045 > airfoil and i saw that the globally performances are better then > the RAF 48 > I would like to know if ever somebody know how to find the coordinates of > this new airfoil and what kind of modification must be make to the spars > and if ever the incidence angle relative to fuselage must be change or not > for to be sure to fly with the fuselage at horizontal level at > max cruise > speed . aabbcc01, The AS5045 doesn't fit the stock spars well in the 48" chord version. The AS5046 is much better, leaving spar dimensions almost exactly the same. The incidence should be reduced to roughly .5-1.0 degree, but we are waiting on another stability analysis (HINT, HINT) to make sure, and even then, the number may need adjustment due to fuselage, canopy, etc effects. We will have one flying in the next two months. The coordinates for the AS5046 are below. The extra column of zeros is there only because a 3D CAD program will need them for importation, and I'm too lazy to delete them. 1.00006 .00134 0 .99804 .00200 0 .99260 .00372 0 .98401 .00594 0 .97220 .00866 0 .95749 .01168 0 .93979 .01474 0 .91895 .01797 0 .89512 .02146 0 .86847 .02532 0 .83924 .02960 0 .80767 .03441 0 .77409 .03982 0 .73889 .04596 0 .70270 .05277 0 .66609 .06004 0 .62962 .06733 0 .59358 .07375 0 .55759 .07896 0 .52139 .08307 0 .48502 .08610 0 .44860 .08824 0 .41235 .08957 0 .37649 .09013 0 .34123 .08996 0 .30680 .08908 0 .27342 .08752 0 .24130 .08527 0 .21060 .08233 0 .18148 .07874 0 .15411 .07456 0 .12868 .06983 0 .10538 .06454 0 .08429 .05863 0 .06537 .05215 0 .04876 .04527 0 .03450 .03803 0 .02260 .03058 0 .01322 .02302 0 .00632 .01544 0 .00193 .00801 0 .00003 .00097 0 .00071 -.00489 0 .00510 -.00988 0 .01342 -.01505 0 .02489 -.02044 0 .03925 -.02596 0 .05625 -.03155 0 .07571 -.03710 0 .09745 -.04246 0 .12133 -.04752 0 .14723 -.05216 0 .17505 -.05634 0 .20462 -.06003 0 .23577 -.06321 0 .26829 -.06582 0 .30198 -.06783 0 .33664 -.06919 0 .37208 -.06986 0 .40806 -.06980 0 .44435 -.06899 0 .48068 -.06725 0 .51700 -.06445 0 .55315 -.06046 0 .58935 -.05509 0 .62582 -.04860 0 .66265 -.04132 0 .70010 -.03396 0 .73735 -.02722 0 .77354 -.02135 0 .80827 -.01632 0 .84111 -.01210 0 .87165 -.00870 0 .89952 -.00605 0 .92439 -.00407 0 .94591 -.00256 0 .96421 -.00129 0 .97931 -.00050 0 .99065 -.00052 0 .99763 -.00101 0 .99995 -.00134 0 Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ Date: Sat, 13 Jun 1998 17:32:50 -0500 From: "Mark Langford" Subject: KR: unpublished coordinates I guess I somehow missed that these were supposed to be unpublished, not that I doubt it for a second, of course. Sorry about that. I guess we know I can't keep a secret now. And it would be nice to see Troy fly it and survive the experience before too many of us go down that road. If it makes you feel any better, I'm sure they're in good hands, since we know that aabbcc01 has them now. Anybody with a name like that has to be trustworthy, right? Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S N56ML at http://home.hiwaay.net/~langford/kr2s.html ------------------------------ End of krnet-l-digest V2 #94 ****************************