From: owner-krnet-l-digest@teleport.com[SMTP:owner-krnet-l-digest@teleport.com] Sent: Monday, June 29, 1998 4:29 PM To: krnet-l-digest@teleport.com Subject: krnet-l-digest V2 #107 krnet-l-digest Monday, June 29 1998 Volume 02 : Number 107 ---------------------------------------------------------------------- Date: Sat, 27 Jun 1998 22:36:11 EDT From: EagleGator@aol.com Subject: KR: Elevator leading edge Now, I KNOW I'm the only one who's made mistakes in building by not thinking through what the blue prints are telling me and comparing that with how the airplane will function, but.... Just thought I'd share a mistake that is intuitive obvious if you're paying attention, but it bit me nonetheless. I finished glassing my elevator, and started working on the installation of the horizontal stab, and decided to fit the two together now that all the glass work was done. They fit together perfectly! The only problem was that the elevator leading edge at the tips locked itself firmly inside the gap seals on the trailing edge of the horizontal stabilizer. As long as I didn't need to move the elevator, this would work great ... duh. I forgot to account for the taper of the horizontal stab and the elevator when I foamed the leading edge of the elevator, and therefore made it a constant depth from the center to the tips. Oooops. The bottom line is that the leading edge depth needs to be tapered commensurate with the taper in thickness of the horizontal stab so that it has the clearance to rotate inside the gap seal. Intuitively obvious to most, but I guess everyone's common sense takes a vacation occasionally. I hope this helps someone else out! Cheers, Rick Junkin EagleGator@aol.com St. Charles MO ------------------------------ Date: Sat, 27 Jun 1998 22:36:24 EDT From: CruzJ12@aol.com Subject: Re: KR: Arlington Flyin What are the dates of the Arlington airshow this month? ------------------------------ Date: Sat, 27 Jun 1998 22:15:30 -0600 From: "gary" Subject: RE: KR: Arlington Flyin JULU 8-12 GO TO http://www.nweaa.org/nweaa/ > -----Original Message----- > From: owner-krnet-l@teleport.com [mailto:owner-krnet-l@teleport.com]On > Behalf Of CruzJ12@aol.com > Sent: Saturday, June 27, 1998 8:36 PM > To: krnet-l@teleport.com > Subject: Re: KR: Arlington Flyin > > > What are the dates of the Arlington airshow this month? > ------------------------------ Date: Sat, 27 Jun 1998 21:10:25 -0700 From: Micheal Mims Subject: KR: A little more progress Well sports fans today I made a little more progress. Last week I had dug out the foam where the aileron belcrank moves back and forth and glassed it. I made sure I removed enough foam so the belcrank and aileron pushrod had plenty of room. It came out OK but I think I would have been happier if I would have spent a little more time trying to make it look a little more sano. Next I installed the foam blocks for the tips and waited for them to cure. I used System III 5 minute epoxy which actually kicked off too fast for such a big piece but it worked out. While the tips were curing Brad, George Bell and a few others showed up so I decided to flip this flying machine back over on its feet. I got tired of looking at the belly anyway! :o) While I was sweeping out the hanger my son Patrick had fun pushing the airplane around on the ramp. He would take a break and climb in and make airplane noises for a while then climb out and push it around again. It was kinda funny and George made the comment that "it sure would have been fun to have an airplane that size to play with when he was 10", I agreed 100%, heck its fun to have it around to play with now! Eventually I was able to talk Pat into letting me have my toy back so I could sand down the tips in preparation for glassing. Both are ready for glass (on the top anyway) and I plan to do that tomorrow. I will also weigh it tomorrow so I can update that weights page that Brian Bland setup. If anyone out there has any weights to share we could sure use more data on that page! Even final empty weights on completed projects would be great (hint hint for the flyers). If you want to post your empty weight make sure you include a brief description of what engine, instruments, etc. and just email it to me. Oh yeah,.. I took about 20 pictures today, I should have them ready to scan tomorrow night. Stay tuned! - -- 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, 27 Jun 1998 21:39:47 -0700 From: Micheal Mims Subject: KR: Swing out Engine Mounts Does anyone know if swing out style mounts are covered in Tony's Firewall Forward book? Or does anyone have an info on them? - -- 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: Sun, 28 Jun 1998 01:58:13 EDT From: miketnyc@juno.com (Michael Taglieri) Subject: KR: Finally on List! I don't know what Ross did but it finally worked, and I am on the KR List at my Juno address. Good timing, since AOL is working worse and worse, and I think it's time to put it out of its (my) misery. Mike Taglieri - ------------------------------------------------ 'Mine goes up to 11' - ------------------------------------------------ _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866] ------------------------------ Date: Sun, 28 Jun 1998 12:00:21 EDT From: EagleGator@aol.com Subject: Re: KR: Swing out Engine Mounts In a message dated 6/27/98 11:40:29 PM EST, mikemims@pacbell.net writes: > Does anyone know if swing out style mounts are covered in Tony's > Firewall Forward book? Or does anyone have an info on them? > Tony devotes all of about 2 paragraphs to the subject. His recommendation is that unless you have a CG condition you are contending with, don't use a swing out mount. With your 290, I imagine you fit the "contending with a CG condition" criteria. The only drawing shows the changes to cable routing you have to do to make it work without detaching everything, but not much other info. Cheers, Rick Junkin EagleGator@aol.com St. Charles MO ------------------------------ Date: Sun, 28 Jun 1998 09:20:38 -0700 From: Micheal Mims Subject: Re: KR: Swing out Engine Mounts EagleGator@aol.com wrote: <>> That would be exactly what I am dealing with. I need to get the engine as close as I can to the firewall. Without a swing out mount I would have to pull the engine to work on the mags and change the oil screen. I have already installed fuel and control cables on the left hand side thinking that would be the side with the hinge. - -- 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: Sun, 28 Jun 1998 20:46:53 -0400 From: Kip Anderson Subject: KR: KR news letters I have the East Coast KR news letters for copying. Who would like them next. Send name and address to: kipapilot@gnc.net ------------------------------ Date: Sun, 28 Jun 1998 21:04:04 EDT From: KR2616TJ@aol.com Subject: KR: Progress Just finished applying the final Smooth Prime coat on both stub wing bottoms, bottom of the fuselage and the bottom of the horizontal stab. I was able to sand one of the stub wings today with 320 grit dry paper. Poly Fiber says you can fly the plane with only Smooth Prime on it and I believe it, it looks pretty good as is. I will not be UV coating the bottom of the plane so I should be able to sand everything else tomorrow and flip 616TJ right side up using the ol' flip-o-matic (patent pending) in a day or two. Guys I've said it before but this stuff is for real, it flat out fills the pin holes and is a breeze to sand. You have to order it directly from Poly Fiber at 1-800-362-3490. Brian how do I send my weights for posting on your a51 weight reference page? Dana Overall Richmond, KY mailto:kr2616tj@aol.com http://www.geocities.com/CapeCanaveral/Hangar/7085/ ------------------------------ Date: Sun, 28 Jun 1998 21:10:05 -0500 From: "Dean R. Collette, MD" Subject: KR: Wing Attach fittings Netters, I was talking with a friend who happens to own a machine shop. It seems that they specialize in piece-work. I gave him a set of prints for the WAFs. He thinks that he will be able to make these puppies for less than what RR will sell them for, but, as is always the case, the price goes down with the number that he would make. If anybody out there would be interested in a set, send me email. No promises. Just trying to get a price. Dean mailto:drdean@execpc.com ------------------------------ Date: Sun, 28 Jun 1998 19:29:30 -0700 From: Micheal Mims Subject: Re: KR: Progress > < page?>> > Dana Overall Smooth Prime is awsome and you can send your weights to me if you want. - -- 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: Sun, 28 Jun 1998 23:04:33 EDT From: CruzJ12@aol.com Subject: Re: KR: Arlington Flyin thanks Gary...........joe ------------------------------ Date: Sun, 28 Jun 1998 23:08:11 EDT From: CruzJ12@aol.com Subject: Re: KR: KR news letters I would like them......thanks Joe Joe Cruz 60 Crumtown Road Spencer, NY 14883 CRUZJ12@aol.com ------------------------------ Date: Sun, 28 Jun 1998 23:01:35 -0500 From: "Dean R. Collette, MD" Subject: KR: Mounting center spars Netters, When all of you (who are a lot further along than I am) mounted the center spars to the fuselage - how did you make sure that the spars are perpendicular? I have a couple of ideas, but I'd like to know what's been tried and worked. It seems that I am a little gun-shy lately. Dean mailto:drdean@execpc.com ------------------------------ Date: Sun, 28 Jun 1998 21:04:40 -0700 From: Micheal Mims Subject: Re: KR: Mounting center spars Dean R. Collette, MD wrote: > Netters, > > When all of you (who are a lot further along than I am) mounted the center > spars to the fuselage - how did you make sure that the spars are > perpendicular? > > > Dean-- Well first it helps to have a nice straight fuselage (boat) to glue them too. But this is what I did. First I marked a centerline down the center of the cockpit area and then I leveled the boat (after cutting the main spar holes in the fuselage sides). I marked a center line on the spar and slid it in. First thing you can check it that the main spar is level with the boat then after you make sure the spar is centered use the tail post as a reference for checking to see if its square with the centerline. Its actually pretty simple. I had to remove very little material from one of the upright members to make mine square. I used lots of T-88 on the spar and the uprights. I had already made my large plywood gussets that go on the inside of the fuselage so I used more t-88 and brass nails to nail them in place. That was it, its actually very simple. > 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: Sun, 28 Jun 1998 22:06:18 -0600 From: Ron Lee Subject: Re: KR: Mounting center spars Just a thought. The real builders comments carry more weight. If the spar sticks out from the sides evenly, then the distance to the tail, or front fuselage should measure the same if it is perpendicular to the fuselage. Ron Lee At 11:01 PM 6/28/98 -0500, you wrote: >Netters, > >When all of you (who are a lot further along than I am) mounted the center >spars to the fuselage - how did you make sure that the spars are >perpendicular? > >I have a couple of ideas, but I'd like to know what's been tried and worked. >It seems that I am a little gun-shy lately. > >Dean >mailto:drdean@execpc.com > > > ------------------------------ Date: Sun, 28 Jun 1998 21:23:21 -0700 From: Micheal Mims Subject: KR: Weights Well today was the big weigh in! Here we go, the airframe which includes everything aft of the firewall, flight controls, filler and paint on the belly, filler on top, landing gear, wings with wing tips, engine controls, nose cowling. What this doesn't include is engine, engine mount, engine and flight instruments, electrical, paint and upholstery. Are you ready? 390 pounds! That's not great but that's not to bad either. I also took the time to level the fuselage and weigh it in that condition. This gave me an idea where the CG was so I could do a little number crunching. I also had my son Pat sit in the fuselage on the third trip to the scales so I could see the effect of adding weight to the seat area. We also used a 1 gallon jug to test the capacity of the aux. tanks in the stub wings. Its amazing how close you can get by doing the math. My calcs said they would hold about 6.6 gallons and believe it or not they held about 6.5! - -- 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: Mon, 29 Jun 1998 00:00:47 -0500 From: "Dean R. Collette, MD" Subject: Re: KR: Mounting center spars Ron, This was my thought as well. I thought that I had read somewhere that someone used a transit. I'm not sure how this would work - heck, I'm not sure I know how to work a transit. Dean >Just a thought. The real builders comments carry more weight. If the spar >sticks out from the sides evenly, then the distance to the tail, or front >fuselage should measure the same if it is perpendicular to the fuselage. > >Ron Lee ------------------------------ Date: Sun, 28 Jun 1998 23:13:10 -0600 From: "Jeb" Subject: KR: Weights and progress report Well, I haven't posted to KRNET in quite a while so... About 3 weeks ago I got Jeff up and we rolled it out and attached the wings and weighed it. KR2-S with Subaru turbo with Ford Fiesta radiator (with water) Samarai alternator etc...Front deck with fuel tank (empty) canopy just sitting on there loose, turtle deck taped down. No instruments or battery just yet (die hard in the tail??) Nosewheel weight (on slight sloped driveway) .........270 Mains each had ...............135..........................................270 540 C.G. was about 8 inches too far forward. Fuel / Instruments and Me (220) bring it back pretty near add the battery and I believe it'll fly! progress report... After getting the canopy floxed into my homemade frame I spent a while getting the fit just right, (read as correcting mistakes) and then making some hinges. The 1st attempt weren't deep enough so . . . take 2, These work fine. My canopy front lip rotates down and under the forward deck like Don Betcham's I ordered up some gas struts and the ball joints using the info off Mark Langford's webpage. and made some brackets. Now where to put 'em??!! I finally decided to mount the front brackets under the longerons with countersunk screws and lots of flox. The rear canopy ones are floxed to the 3/16" plywood and are very strong with all the flox. I spent yesterday and today prettying up the insides with foam and glass, I just got back in from garage after cutting excess glass out with nice straight lines along the tape I'd overlapped the glass onto. So with the exception of filling and sanding the canopy is DONE! I immedidately installed it onto the hinges and attached the struts and it opens and closes!! Now I need ideas for latching mechinism. I'm thinking of a bar with hooks on the ends to grab pins on either side. Lever in the middle. I recently spent hard earned savings on a new belt drive unit from Reductions Inc in Canada. The one I had I just wasn't comfortable with, John Bryhan jeb@thuntek.net // www.thuntek.net/~jeb/krpage.htm Los Alamos, NM ------------------------------ Date: Mon, 29 Jun 1998 01:43:20 EDT From: HAshraf@aol.com Subject: Re: KR: Wing Attach fittings I would like to purchase a set. Thanks Haris Ashraf ------------------------------ Date: Mon, 29 Jun 1998 04:56:58 EDT From: KenikaS@aol.com Subject: Re: KR: Columbia, TN Dana, Since I'm going to be out of the country during Perry this year, I was hoping you guys would let a 'westsider' come and get his annual KR fix. My son works for Southwest Airlines so I can get to Nashville free. My wife and I have not been to your part of the country and are looking forward to it. Could you please either post or e-mail me directly, directions to Columbia from the Nashville airport, and the phone number of the discount hotel. Looking forward to meeting the group. Thanks, Dennis Steed kenikas@aol.com Salt Lake City, UT ------------------------------ Date: Mon, 29 Jun 1998 07:13:46 -0500 From: Ed Janssen Subject: Re: KR: Swing out Engine Mounts Mike, Fred Keller, who built a very nice KR-1 (back in the '70s, I think) had one. Pretty nifty too. Sure looked like it would make life easier. If I recall correctly, he was using a Revmaster with their dual-headed mag. Picture in Sport Aviation. My three ring notebook with the picture is not immediately handy, but I know I have it and could dig around a bit for it if someone doesn't immediately come up with the date. I'll see if I can find it today. Ed Janssen At 09:39 PM 6/27/98 -0700, you wrote: >Does anyone know if swing out style mounts are covered in Tony's >Firewall Forward book? Or does anyone have an info on them? > >-- >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: Mon, 29 Jun 1998 08:26:27 EDT From: LngDistRep@aol.com Subject: Re: KR: RF Noise filters...Success Jeff, Thanks for the supporting info on the filter. Looks like we are on the right track. Again thanks and keep in touch. Regards, Paul ------------------------------ Date: Mon, 29 Jun 1998 08:44:24 EDT From: Kr2dream@aol.com Subject: Re: KR: KR news letters I would like them please Bob Lasecki 910 Sherwood Dr., #20 Lake Bluff, IL 60044 ------------------------------ Date: Mon, 29 Jun 1998 11:07:08 -0400 From: "Thomas Gatliff" Subject: RE: KR: Columbia, TN Hey Dennis, Figured I would help out Dana a little bit. Below is an earlier post about the Columbia, TN gathering from Dana. Also, the motel of choice is the "Polk" motel. The number is (931) 388-4913 .... considering the number of people going, I would make reservations ASAP.... Thomas Gatliff gatliff@mindspring.com >OK, guys like Mark said, our East Coast Gathering will be held this year at >Maury Co. Airport (MRC) in Columbia, TN, Saturday July 25th. If you are >planning on attending please let Mark Landford, or myself know so that we can >have somewhat of a head count. Thanks for all the responses, I heard from >numerous people off the KRNet. We were obviously unable to accommodate >everyones wishes for the location but I hope you will understand the thought >process. We want to make this a fun flying Saturday and not just a bunch of >builders (like me) and be able to provide hotel space for those who want to >make a weekend of it (I plan on this). We have three people, Troy, Mark and >myself in three different states trying to put this thing together on somewhat >of a short notice so we needed an airport we were familiar with, close to a >major airport for commercial travel, one that was within easy flying distance >of 12 or 15, or more, states and one that had a KR on the field belonging to >someone who would be willing to lend a hand. We know what we have at >Columbia. The FBO was disappointed when we moved the gathering before. Also >we needed a weekend somewhere that nothing else was going on, the airshow was >a nice idea but be want to see KRs flying. If your KR is flying and you can >make it there, come on down (or up). I doubt mine will be finished by then, >but I'll keep at it. Quick reference, Columbia, TN is about 30 nm, by air, >south of Nashville with a 6000 ft. runway, away from everything, great airport >and hopefully will have several flying KRs for all you guys who "need a ride". >Hope you understand our reasoning here guys, and hope to see everyone there. >Again let us know if you are interested...........and pass the word. > >Dana Overall >Richmond, KY >mailto:kr2616tj@aol.com >http://www.geocities.com/CapeCanaveral/Hangar/7085/> -----Original Message----- > From: owner-krnet-l@teleport.com [mailto:owner-krnet-l@teleport.com]On > Behalf Of KenikaS@aol.com > Sent: Monday, June 29, 1998 4:57 AM > To: krnet-l@teleport.com > Subject: Re: KR: Columbia, TN > > > Dana, > Since I'm going to be out of the country during Perry this year, > I was hoping > you guys would let a 'westsider' come and get his annual KR fix. > My son works > for Southwest Airlines so I can get to Nashville free. My wife > and I have not > been to your part of the country and are looking forward to it. Could you > please either post or e-mail me directly, directions to Columbia from the > Nashville airport, and the phone number of the discount hotel. > Looking forward > to meeting the group. > Thanks, > Dennis Steed > kenikas@aol.com > Salt Lake City, UT > ------------------------------ Date: Mon, 29 Jun 1998 09:52:49 -0700 From: Ross Youngblood Subject: Re: KR: Elevator leading edge Rick, DOH! I didn't make that exact mistake, but had to re-do my hinge gap area a second time to get the contour I wanted. Then, recently, I got some epoxy/resin in the hinge gap area, (patch for hangar rash), and guess what... I pulled the glass loose from the stab. side inboard when I attempted to remove the elevator to clean up the mess... they were STUCK together. At any rate, the repair to this repair...causes some minor interference at full elev UP.... so I have to go in and check this out to fix it. -- Regards Ross EagleGator@aol.com wrote: > Now, I KNOW I'm the only one who's made mistakes in building by not thinking > through what the blue prints are telling me and comparing that with how the > airplane will function, but.... > > Just thought I'd share a mistake that is intuitive obvious if you're paying > attention, but it bit me nonetheless. I finished glassing my elevator, and > started working on the installation of the horizontal stab, and decided to fit > the two together now that all the glass work was done. They fit together > perfectly! The only problem was that the elevator leading edge at the tips > locked itself firmly inside the gap seals on the trailing edge of the > horizontal stabilizer. As long as I didn't need to move the elevator, this > would work great ... duh. I forgot to account for the taper of the horizontal > stab and the elevator when I foamed the leading edge of the elevator, and > therefore made it a constant depth from the center to the tips. Oooops. > > The bottom line is that the leading edge depth needs to be tapered > commensurate with the taper in thickness of the horizontal stab so that it has > the clearance to rotate inside the gap seal. Intuitively obvious to most, but > I guess everyone's common sense takes a vacation occasionally. I hope this > helps someone else out! > > Cheers, > Rick Junkin > EagleGator@aol.com > St. Charles MO ------------------------------ Date: Mon, 29 Jun 1998 09:54:06 -0700 From: Ross Youngblood Subject: Re: KR: Swing out Engine Mounts Mike, He has pictures of swing out mounts in the book, but doesn't go into too much detail. I think however, that some of the pics might also be in the other books. -- Ross Micheal Mims wrote: > Does anyone know if swing out style mounts are covered in Tony's > Firewall Forward book? Or does anyone have an info on them? > > -- > 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: Mon, 29 Jun 1998 10:04:32 -0700 From: Ross Youngblood Subject: Re: KR: Mounting center spars Dean, Tony Bengellis covers this in his books (I think), he has a chapter on alignment. What I did first was to level the "boat" using a water level. I got an empty 1 gallon milk jug and bought some clear tubing at the hardware store.. about 25 feet. You stick the tubing into the jug so that you have about 6-12" inches coiled at the bottom to insure that the tube doesn't come un-ported. Then I tied a loop around the handle. Fill the jug with water and get some food coloring to color the water. Then I used two different attachments at various times to make a level. You can tape a metal graduated rule (I had a stanley square/level with a metal rule), and you can use this to check the height of the fuselage at various points. I had the jug placed on a stool near the middle of the plane, and the plane was on a KR-Kart. (See past newsletters). So, then it was first a matter of leveling the fuselage fore/aft, then left,right. Then with the fuselage jigged in place, I measured from the tip of the FWD spar to the tail post, and also to the center of the fwd fuselage X-member. I did these measurments a couple of times and averaged them. Putting all of this in the logbook. Then I waited a week, did it again, without looking into the logbook first to see if I got the same measurements, when I did, I decided it was time to epoxy the buggers in. Then I did one last check before epoxying in the 5/8" sq blocks to the fuselage sides. I also found that you don't really need a metal rule, you can use masking tape to tape a 5/8" piece of spruce to the end of the tubing, and use a Sharpe marker to make a mark, then you can go around to see if the other sides are lining up to the mark. Or make pencil marks where the water hits at various points. The water level also comes in handy for setting dehideral and washout. I put the trig stuff (algebra stuff) in a newsletter article once, get your calculator out do some sines and cosines, and you know how many degrees 1/16" error is with a water level. It's not much. -- Regards Ross Dean R. Collette, MD wrote: > Netters, > > When all of you (who are a lot further along than I am) mounted the center > spars to the fuselage - how did you make sure that the spars are > perpendicular? > > I have a couple of ideas, but I'd like to know what's been tried and worked. > It seems that I am a little gun-shy lately. > > Dean > mailto:drdean@execpc.com ------------------------------ Date: Mon, 29 Jun 1998 13:19:52 -0400 From: smithr Subject: KR: hardware Now that I'm down to serious assembly on the elevator, I've got a few questions on hardware for the hstab/elevator: 1. While temporarily trying some AN bolts in tight holes, the cadmium plating has worn off or been scratched. Should I still use these bolts? 2. Should you glue the bolts in with t88 as you install them? I assume this is a bad idea as they can never then be removed without spar damage. 3. Should you put a washer under the bolt head as well as under the nut? I assume the answer to this is no. 4. Do you cover up the elevator hinge assembly with glass/epoxy or leave it open for inspection or cover it with a transparent inspection plastic? My hstab/elevator is looking good. I can't imagine trying to do it without Langford's one-piece rib trick and his great trick of gluing the alum hinges prior to drilling. Thanks Mark!!. Also the 3/16 steel rod was needed. The hard part was getting all 4 ribs in one plane. Water level didn't work. A piece of string (my favorite tool) stretched tight did work. Bob Smith (Its finally hit me what a big job building a KR is!) ------------------------------ Date: Mon, 29 Jun 1998 10:39:41 -0700 From: Micheal Mims Subject: Re: KR: Mounting center spars Ross Youngblood wrote: > > > > When all of you (who are a lot further along than I am) mounted the center spars to the fuselage - how did you make sure that the spars are > > perpendicular? > > > > I have a couple of ideas, but I'd like to know what's been tried and worked. It seems that I am a little gun-shy lately. > > > > Dean > > mailto:drdean@execpc.com I don't know, maybe I tend to over simplify things a bit but this is what I did to make sure the boat was level for and aft and side to side. I used a bubble level (the kind carpenters use) across the longerons for side to side then I drew the outlines of the four vertical members (the ones on each side o the spars) on the outside of the fuselage skins. I then drew lines at 90 degrees from these to make a line about 3 feet long that went from just over the forward spar to the aft spar. I used this line as a level reference line (the firewall is not vertical to the fuselage so I didn't want to use it). From this reference line I used my full size rib template that had the main spar location drawn on it and placed it a 2 degrees incidence (3.5 for stock KRs) on the side of the fuselage. I traced around the template with a marker. Now just by looking at the rib drawing on the side of the fuselage over the vertical members I can see where the spar must go. Easy guys,.. easy! No water to clean up afterwards either! :o) ------------------------------ Date: Mon, 29 Jun 1998 14:12:08 EDT From: BSHADR@aol.com Subject: KR: Long tale about a Soob engine - but it has a lesson in it! KRNetheads: This is long and more engine related, but it has a leeson in it too. It was on a AirSig list. Randy Stein BSHADR@aol.com ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ To all Soooberators: I'm a wiser man after a series of incidents you might find instructive: Gory details: A friend and I flew to the London Airshow, about 100NM away. Temps were up a bit when we arrived, but nothing exciting, more like normal temps for this engine. Thought "hmmm" checked oil, was fine, "maybe temps build after an hour or so" (longest XC to date). At the end of the day, started up to head home....hmm no oil pressure, zilch, nada...doesn't make any kind of sense. Everything else is normal..."hmmm, the stupid gauge has always acted weird, probably packed in" We watched the temps, etc through a looong wait to get walked to the flight line, long wait for clearance, etc. everything else is in the green, engine running like a top. Figured, well, if there is anythihng really wrong w/ the pressure, it'll show on TO...temps will start to climb and we'll just come around and plop her down....no problems..temps barely moved w/ long straight out climb to 3000. "OK, that does it, the gauge must be nushed", but we wore the paint off the temp gauges watching them all the way home. Kept the power down to economy cruise all the way. Oil temp never went above 175 and water stayed at 185 as usual, but I kept my usual vigilance for landing areas, diverted north of Chatham, just to be sure. No worries, nice flight home. Next day, flew into Windsor for another fly in...15 min, took a friend for a spin, then home again...all was well, except "just to be sure", I had added an extra 1/2 litre of oil to the beastie...wrong!! wrong!! wrong!! extra oil will end up as corrosion protection in the engine room and down the fuselage...I should know better..done it before. I've been trying for a few extra RPM for TO, so I called Dave Johnson to pick his brain about mechanical advance and the conversation got 'round to the London trip. He said that I could have a bad oil pump, ergo, a spun bearing, which would explain a few other minor nuisances, (TO rpm gradually getting lower over time, etc). I told him that the temps would surely have at least given some indication that some thing was wrong, to which he replied."not necessarily".......gulp! You can see where this missive is going, right? I pulled the prop, cowlings etc. (I was going to make some ignition mods anyway), attached a fresh pressure gauge and fired it up. SHEEEEIIIT!! Some sonofabitch was in the engine banging away trying to get out. Pulled the engine, took it to the guy who rebuilt it, and with a tear said "70 hrs ain't what I call bullet proof" He tore it down, then called to tell me the oil pickup tube fell out 'cause the damn thing should be mounted w/ a clamp. Said he thought that was a lousy design to not have one (!!!???) I pointed out that there WAS one when I tore the engine down to give it to him way back when. He replied, "Well it ain't there now!" Said he would make sure the tube stayed in somehow this time I said, (after checking the Haynes), just put the right one in where the manual says this time. (gotta be nice if I want my engine back before Xmas...be nice, be nice, be nice, deep breath!....be nice!) Just for fun, I checked my old box of parts that I got back from him after the first rebuild, and guess what I found? Anyway, this tale is getting long, so I'll just say that he said he'd "work with me on the price of repairs" and I should have my engine back in the bird by next weekend. To his credit, he has an excellent rep in town, and has always been fair with me. He probably just screwed up as we all do from time to time. I just wish he'd chosen a different engine to do it on. Whaddya gonna do? I think we'll work it out ok. BTW...crank needed regrind, everything else is fine. Lessons learned: a. trust your gauges...even if it is nuts, the lost time is cheaper than repairs b. never start your engine w/ headphones on. Art Mitchell tried to teach me that...might have heard the engine noises if I'd followed that advice. c. the EA81 must be one hell of a tough engine 75 minutes, 3900rpm, with no oil pressure and no sign of distress. d. my insistence on only flying where I can land safely might not be a bad idea to maintain ------------------------------ Date: Mon, 29 Jun 1998 17:10:15 EDT From: Kr2dream@aol.com Subject: KR: SOOb question I am one of the die-hards who is sold on the idea of using a soob on my KR-2S. I have been told by people who are supposed to be engine professionals that the direct-drive soob must be mounted with the thrust line 2 inches below where the VW crank center would be. They claim that this offset is common and does NOT affect performance. Supposedly there are a lot of them flying offset vertically by 2 inches. Anyone out there knowledgeable enough to comment on the change in performance that might be expected due to the offset? Or am I just being paranoid in questioning and not blindly accepting? I am planning on the EA-81 turbo direct drive rated at 100 hp. Bob Lasecki Confused and sweating in Chicago ------------------------------ Date: Mon, 29 Jun 1998 19:23:29 -0400 From: Donald Reid Subject: Re: KR: SOOb question Kr2dream@aol.com wrote: > > I am one of the die-hards who is sold on the idea of using a soob on my KR-2S. > I have been told by people who are supposed to be engine professionals that > the direct-drive soob must be mounted with the thrust line 2 inches below > where the VW crank center would be. They claim that this offset is common and > does NOT affect performance. The ONLY reason that I can think of why a soob must be 2 inches lower than a Vdub is due to clearance with the cowling. This is just a guess, since I do not know the actual dimensions. I can think of no other rational answer for the question. I agree that a few inches one way or the other will have a minimal effect on the performance. - -- 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: Mon, 29 Jun 1998 19:30:35 -0400 From: Donald Reid Subject: Re: KR: hardware smithr wrote: > > Now that I'm down to serious assembly on the elevator, I've got a few > questions on hardware for the hstab/elevator: > > 1. While temporarily trying some AN bolts in tight holes, the cadmium > plating has worn off or been scratched. Should I still use these bolts? If they are the hinge bolts, it won't make any difference due to the movement. This would remove the plating anyway. If they are on the through-spar bolts, it should not make any difference since the bolts should be painted with varnish prior to final insertion (if they are not glued in with epoxy, which does the same thing) > 2. Should you glue the bolts in with t88 as you install them? I assume > this is a bad idea as they can never then be removed without spar > damage. I did, and yes, removal will be difficult. > 3. Should you put a washer under the bolt head as well as under the > nut? I assume the answer to this is no. Only if you need to adjust the "thickness". If I need two washers, I put one under each side. If three, then I put two under the head and one under the nut. More than three and get the next shorter bolt. > 4. Do you cover up the elevator hinge assembly with glass/epoxy or leave > it open for inspection or cover it with a transparent inspection > plastic? I didn't. I may regret that later; however, cutting out a small area for inspection purposes is easy enough. - -- 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 ------------------------------ End of krnet-l-digest V2 #107 *****************************