From: KR-net users group digest[SMTP:kr-net@telelists.com] Sent: Saturday, October 23, 1999 11:13 PM To: kr-net digest recipients Subject: kr-net digest: October 23, 1999 KR-net users group Digest for Saturday, October 23, 1999. 1. Admin cranky 2. Re: Retract Landing Gear Question 3. Change in Profile 4. visit 5. House Paint. 6. Dr Dean, Gathering awards 7. Epoxies and such 8. C.G. Indicator 9. Engine for Sale Update 10. Re: C.G. Indicator 11. Test #2 12. Looking for KR-2 13. Re: House Paint. 14. Re: Passing the Torch 15. Re: New Wing 16. UNCLE - YOU WIN BOBBY 17. Panel Planner CD? 18. Re: New Wing 19. Re: C.G. Indicator ---------------------------------------------------------------------- Subject: Admin cranky From: "Ross R. Youngblood" Date: Sat, 23 Oct 1999 00:38:19 +0000 X-Message-Number: 1 I like a good email flame war as good as the next web junkie. However I think I'd better lay some ground rules. 1) Flaming emails are tolerated until the Admin gets Cranky. If you don't own a KR, or are actively building a KR, and you post a flamer... I can require approval of your posts prior to them making it to the list. My cranky meter is getting near the 80% point. I like it when the old timers to the net get into a flame war, it's fun, but if you are not building somthing, try to stay out of the fray, until you go buy some spruce sticks. 2)We all have our nights/days where we do "me too" emails. I usually delete these, but others have problems with these, watch the me too emails unless you have posted some technical stuff recently. For example, a link to photos, or a tip, or a nifty question. 3) Suspension... If you are "suspended" you will still get KR-net email, so you can privately steam over how foolish everyone is, your posts however will go into the "standby" pile until your lazy admin or one of the other list moms gets around to "moderating" the post and approving it for the list. Jeff Scott is one of the super assistants here, and for the moment, he is unable to approve stuff (my problem to fix for him). So at the moment being suspended is going to be very bad and painful, It might even hurt. I'm considering getting Jim Faughn to record the KR-song and have it play on your PC every night when you log on. (Actually I like the KR-song, this just seemed like a funny thing to try and do... everyone is so serious on this list lets LIGHTEN up!) Go sand somthing already! 4) Re-admission You will be re-admitted once your admin feels better and maybe has an answer for a pesky KR-problem he has been thinking about. 5) Early Re-admission If you own a set of KR-plans you can email the serial number of the set to krnet@krnet.org, this will tell me that you are actually considering building a KR, and have junior cadet license to flame and complain. If you have spruce sticks, then send the invoice number and shipping costs for your spruce, and this is flyboy license to flame. If you have sanded your KR, and have the dusty carpet and jewlery bills for the wife to prove it, then you have near full flaming status. If you have a flyable KR, then let me know, I will warn the rest of the group that you were mistakenly dropped, and you may flame away... unless the rest of the group gets tired of you and wants you removed. These seem like really subjective rules, and I like them. I think someone needs to work up a KR flamecount rating, perhaps we can just start a seperate email list just for flaming and chatting, and keep the technical stuff seperate. That way the folks who want to socialize and make the occasional KR comment can do so without messing with the KR builders and flyers who need support. (Man, too much coffee tonight... whew!) Rain Station Zebra... (my computer here) is going offline for good. Your admin is packing up the computer and preparing for the great road trip with the smelly dog and evil cat to Phoenix. When we are back up we will be Dust Station Zebra... When I get there you can expect the consistant poor service and long winded emails you have come to expect from your KR-net admin. I'm thinking about updating our web site. I discovered some more cool stuff that Teleport lets us do, and I found that if I refer folks to Amazon.com to buy books, we get up to a 15% cut. So I am starting to look into that. One of the crazy ideas I had tonight was to try and be a distributor of plans for Rand Robinson. I'm checking on the costs to do credit card processing, (so far it's $$$), and considering on talking to Jeanette. Currently this is my crazy idea, and I don't know if Jeanette will be interested, or if it would be a good deal for anyone. Also, it occured to me, that if enough of the KR-netters needed to purchase somthing (aka the canopy deal that seemed to work out well.) we can get some group buying leverage for both purchases from Rand Robinson, and also for things like GPS systems, nuts bolts, I don't know. I don't really have a lot of time for this so I have to figure a way to make the computer do the work, and I have to be out of the loop, otherwise, everyone will be waiting on me to get back from some stupid business trip and compete my part of the job. It's this darn work thing it keeps getting in the way. I hope when I'm done moving that there are at least 3-5 of you KR-netters still left, we should be able to come up with a few things we need to change on our planes that require more glass and sanding, otherwise, I might finish mine. -- Ross ---------------------------------------------------------------------- Subject: Re: Retract Landing Gear Question From: "Ross R. Youngblood" Date: Sat, 23 Oct 1999 01:09:00 +0000 X-Message-Number: 2 Gary, I'd like to know about this "reflexed" issue on the spring bar. I made a drilling error in my spring bar, and decided that since I had no clue what I was doing, I'd better purchase another, rather than chance the thing splitting where the extra set of holes were. As I recall it was a reasonable chunk of $$$. (I am guessing about $80.00 from Aircraft Spruce) It was several years ago. Of course this was before the 'net, and before I had a good relationship with an EAA tech counselor, so it is possible, I could have used the old spring bar with the extra set of holes. At any rate, you can bet, the SECOND time I drilled, I measured twice, drilled once. -- Ross GARYKR2@cs.com wrote: > I need some help from you folks. First, what is the going price for a > spring bar (normal KR2 type). Second, I got wind that the bars are being > reflexed slightly to help when sitting on the ground. True or false? If true, > has this stoped the gear from cracking the glass above it. > I plan to replace my spring bar this winter and would like to start > getting all my ducks lined up awhile. Thanks. > Gary Hinkle Middletown, Pa. > garykr2@cs.com > > --- > You are currently subscribed to kr-net as: rossy@teleport.com > To unsubscribe send a blank email to leave-kr-net-17800J@telelists.com ---------------------------------------------------------------------- Subject: Change in Profile From: "Ross R. Youngblood" Date: Sat, 23 Oct 1999 01:36:23 +0000 X-Message-Number: 3 Based on a suggestion I have heard frequently, I finally changed the REPLY TO: field of KR-net emails to AUTHOR. Now posts to a thread will go back to the AUTHOR and not KR-net. If you want them to go to the AUTHOR AND KR-net, then add kr-net@telelists.com yourself Lets try this on for size... it only took me a few minutes to figure it out... I know, some think I should have done this 2 years ago... -- Ross ---------------------------------------------------------------------- Subject: visit From: "Mark Langford" Date: Sat, 23 Oct 1999 08:12:21 -0500 X-Message-Number: 4 Ed, Let me know when you want to come by. I'm usually around, but some times are better than others, since I might have 2 kids underfoot at certain times on the weekend. Mark Langford, Huntsville, Alabama mailto:langford@hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford ---------------------------------------------------------------------- Subject: House Paint. From: KR2616TJ@aol.com Date: Sat, 23 Oct 1999 09:44:20 EDT X-Message-Number: 5 LURKING FROM THE DIGEST Couple of days behind here guys but I'll express my experience on the house paint issue instead of slurry. The application of slurry prior to laying glass is done to fill the air pockets in the foam on which the glass will be laid. Although there has been discussion of whether the foam is structural in nature you do still want good adhesion between the skin and foam. It works along the same lines as "painting" the spar caps with raw resin prior to laying the glass. You want to use the same bonding material you are going to use in your application of glass, to soak into the base onto which it will be applied. In prior posts some time ago, it was mentioned to use light weight spackling as a filler on foam before glass was applied. This spackling was a sandable product. I used it on my first set of wings, way before our initial discussion here, and when I peeled the glass off later to use the spars with a set of skins, everywhere I used the spackling it delaminated from the foam without taking any foam at all. Back to whether it matters if the glass "sticks" to the foam providing structure at all.............look at some glass applications out there and you will see delamination in the form of bubbles in the glass. This occurs after time, do you really want this on your airplane? Usually this is a result of "dry/lean" areas of resin. Your use of slurry will reduce the likelihood of this occurring. In my opinion (and experience), stick with epoxy based products and use slurry prior to your glassing. It will pay dividends down the road. Remember guys, I'll be a little behind on replying on the KRnet so it will be hard to engage in a open discussion. If you have a direct question, e-mail me direct and I'll respond with a forward to the KRnet if appropiate. Dana Overall 2000 KR Gathering host Richmond, KY mailto:kr2616tj@aol.com http://www.geocities.com/CapeCanaveral/Hangar/7085/ ---------------------------------------------------------------------- Subject: Dr Dean, Gathering awards From: RFG842@aol.com Date: Sat, 23 Oct 1999 09:45:22 EDT X-Message-Number: 6 Don't understand what all the fuss is about. With new KR Netters and builders, of course the same questions are going to come up time and time again. And who knows, mabey next week someone will come up with a new and better answer no one has thought of before! Anyone who hasn't answered the same question twice doesm't have grandchildren. I find it a small price to pay to delete a bunch of posts for the few gems I keep. And a little humor now and then is like the fat bottomed girls, it makes the world go around. Home building is, should be, and better be fun or we're all wasting our time. I have three brand new Tony Bingelis books, Firewall Forward, Sportplane Construction Techniques and The Sportplane Builder. I'd like to donate these for three Newbie Awards honoring the KR Net Grues who have contributed so much to the net, Net Moms choice, for the gathering new year. Please Email me direct with shipping instructions. Tnks, Bob . ---------------------------------------------------------------------- Subject: Epoxies and such From: Mike Mims Date: Sat, 23 Oct 1999 08:54:16 -0700 (PDT) X-Message-Number: 7 I asked Gary Hunter about the various epoxies that are available to us and here is what he said. I had his permission to repost his response here. In short because of the non structural nature of all the fiberglass components he feels that West can be used throughout the KR. Although besides the pumps he does not see the reasoning for using it. It cost much more than most anything else we can buy. Availability may be the key here. Gary Wrote: Recently, I have learned that Gougeon Brothers (makers of the West System Resins) no longer objects to their resins being used in the construction of recreational or experimental aircraft. At one time, their lawyers / insurance carriers did not approve. However, I do believe you should follow their advice as to which resins are most suitable for "PRIMARY" structural components (wing spars) as opposed to miscellaneous non-structural parts like fairings and such. Personally, I believe that the Pro-set Resins are best for Primary Structures and the West System is more appropriate for general non-structural or secondary structural components. Wing skins, cowlings, hatches, inspection plates, wheel pants, fillers and fairing compounds, etc. In my research, I discovered the most attractive feature of Gourgeon's West System was availability. You can buy it at the local boat supply house in quarts and gallons. Next, was the 'mustard' pump dispenser system they provide. HOWEVER, to my surprise, most people seem to ignore the outrageous price they must pay for these conveniences. On average, the West System costs approximately $10.00 / lb. or roughly twice that of EZ-poxy and half again as much as MGS !!! Pro-set is roughly $8.50 / lb. WOE - wait just a minute here. EXTRA for less. Sorry, that doesn't compute in my math book. FACTOID - The EZ-Poxy formulation (originally Safe-t-Poxy) has the longest and largest, flawless track record in experimental airplane construction. At $5.77 / lb. - it almost seems backwards to the pricing on West System. More for less.... MGS is good stuff too. Pricing is a little more. And, it really pays to post cure this one. Kindest Regards, Gary Hunter Technical Service Representative EPOXY RESINS TECHNICAL INQUIRY SHELL CHEMICALS, USA Toll Free in North America - 800-832-3766 International - 281-544-6600 Facsimile - 281-544-6604 Email - gahunter@shellus.com ===== __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com ---------------------------------------------------------------------- Subject: C.G. Indicator From: "J.R.L. Engineering Consortium Ltd." Date: Sat, 23 Oct 1999 10:44:13 -0500 X-Message-Number: 8 With all the talk about how important C.G. is in a KR, would a C.G. Indicator be useful? I've be thinking for some time about the usefulness and discussed it with some of my electronic engineers at GM. We think its feasible and I my include it on my KR. It would require placement of strain gauges on all three points of contact and simply calibrate them and send this info through a eeprom for conditioning and display or alarm light.. What do you think? KRRon ---------------------------------------------------------------------- Subject: Engine for Sale Update From: "garbez" Date: Sat, 23 Oct 1999 10:56:06 -0500 X-Message-Number: 9 Several people have asked me some questions, so I'm putting it on the net. The 1835 is a gpasc with Accessory package #1 and #6. I bought it from a guy that was build a KR and quit. The engine had never been installed in an aircraft until I bought it. When I bought the engine I took it all apart to check for proper build, as I have been an auto machinist for 25 years. When I installed it in my KR I upgraded the heads to the Hi performance .044 heads with 40x35.5 stainless steel valves, hi-rev springs, steel billet retainer, silicon bronze valve guides, 3/4 long reach spark plugs, and drilled them for a secondary ignition. It has a rev-flow carb. There is only 13 hours of run time on the engine of which 4 hours are in flight. The engine is flying my KR2 at 1000 lbs gross and getting 600 fpm climb and 135 cruise. The numbers for the engine are: CHT 350 OIL TEMP 190 EGT 1200 COMPRESSION 140 OIL PRESSURE 100 COLD 60 WARM It does not burn oil. I have $5,700 invested and am asking $4,000 for firewall forward or best offer. This engine is very strong and you will get everything so you can just bolt to your firewall and go fly. Mike Garbez N998MG Griswold, IA (712) 778-2449 msgtlg@netins.net ---------------------------------------------------------------------- Subject: Re: C.G. Indicator From: marmet Date: Sat, 23 Oct 1999 13:47:25 -0400 X-Message-Number: 10 This is a multi-part message in MIME format. --Boundary_(ID_HITJw1nduxpIWiFOC4sFiQ) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit I dont know about the others, but I sure would like to hear more about this. JC. C-GZFF Quebec, Canada "J.R.L. Engineering Consortium Ltd." wrote: > With all the talk about how important C.G. is in a KR, would a C.G. > Indicator be useful? I've be thinking for some time about the usefulness and > discussed it with some of my electronic engineers at GM. We think its > feasible and I my include it on my KR. It would require placement of strain > gauges on all three points of contact and simply calibrate them and send > this info through a eeprom for conditioning and display or alarm light.. > What do you think? > > KRRon > > --- > You are currently subscribed to kr-net as: marmet2@videotron.ca > To unsubscribe send a blank email to leave-kr-net-17800J@telelists.com --Boundary_(ID_HITJw1nduxpIWiFOC4sFiQ) Content-type: text/x-vcard; name=marmet2.vcf; charset=us-ascii Content-description: Card for marmet Content-disposition: attachment; filename=marmet2.vcf Content-transfer-encoding: 7bit begin:vcard n:Marcoux;J. C. & Jocelyne x-mozilla-html:FALSE org:M & M adr:;;;;;; version:2.1 email;internet:marmet2@videotron.ca fn:J.C. end:vcard --Boundary_(ID_HITJw1nduxpIWiFOC4sFiQ)-- ---------------------------------------------------------------------- Subject: Test #2 From: Michael Taglieri Date: Sat, 23 Oct 1999 14:00:47 -0400 X-Message-Number: 11 This is Test #2 ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj. ---------------------------------------------------------------------- Subject: Looking for KR-2 From: "Leon Adelstone" Date: Sat, 23 Oct 1999 13:30:4 X-Message-Number: 12 I'm looking to buy a well built KR-2. I'm looking for a safe, flying airplane; not a "project". If your's is not for sale, perhaps you know someone else who has one? Thanx Please reply to UncleLeon@AOL.com ---------------------------------------------------------------------- Subject: Re: House Paint. From: David Moore Date: Sat, 23 Oct 1999 17:54:25 -0700 X-Message-Number: 13 KRnetters, I got into a discussion with Dana about this question of using house paint under a glass lay-up. Would it act as a mold release giving you a skin instead of a finished wing. Ever since this was posted to the net, I have been wondering, could you use "Latex" house paint". >Dave, I really believe that the latex would "dissolve", for lack of a better >term, and permeate the exterior of the lay-up, if used as a mold release. My >experience here showed that it would adhere to the epoxy (somewhat) but did >not adhere to the foam at all, thereby increasing the likelihood of >delamination. In essence what you would be doing is introducing a non >compatible agent between the epoxy and the foam. > >Thanks for the kind words. If you want to forward this to the KRNet please >free to do so. > > >Dana > > > David G. Moore mailto:dgmoore1@gte.net Henderson, Nevada ---------------------------------------------------------------------- Subject: Re: Passing the Torch From: Bobby Muse Date: Sat, 23 Oct 1999 19:21:33 -0500 X-Message-Number: 14 At 12:16 AM 10/22/1999 -0400, you wrote: >>It looks like the "Passing of the Torch" is just about complete. > > >I'm sorry so many people seem to be leaving the list, and I hope they'll >stay on the digest and keep their web pages in place. The KR is an early >design whose designer didn't live to get it completely debugged, so it is >not surprising that some things need to be changed I've sometimes >wondered why people who want to change everything and feel competent to >do so don't just start from a blank piece of paper in the first place, >but this is an experimental aircraft and people can do what they want. > >Concerning the new wing, I don't think it's fair to label it "criticism" >to want to see a flying example of the thing before we jump for joy. If >computer models and wind tunnel tests were enough to solve all problems, >aircraft firms wouldn't need test pilots. If I understand right, there's >a single plane now flying with the new wing, and it has so many other >changes that the contribution of the wing to the flight characteristics >is unclear. In addition, the wind tunnel models were constructed to >great precision by the various aeronautical engineers, etc., and as a >laminar flow wing, bumps and other errors of a nonprofessional builder >may affect the results further. > >I'm happy that people continue to experiment with new airfoils, and I'll >be even happier when I hear about the test flights of someone who has >built the new wing from scratch on a fairly stock KR-2 or 2-S and >compares its flying characteristics with another fairly stock plane with >the old wing. > >Finally, KR's have been flying safely for more than 25 years, and it's >pretty well known that the rear of the published CG range should be >avoided. If you're suggesting that the recent stall/spin accident of a >grossly overloaded plane somehow proves that the KR needs a different >airfoil, that's complete nonsense. > >Mike Taglieri > > Well said. Bobby Muse N122B - Wimberley, TX mailto:bmuse@mindspring.com ---------------------------------------------------------------------- Subject: Re: New Wing From: Bobby Muse Date: Sat, 23 Oct 1999 20:40:04 -0500 X-Message-Number: 15 At 08:59 AM 10/22/1999 -0500, you wrote: > >I am remaining on KRnet simply to be able to respond to questions about >the new KRnet/UIUC wing. THis post is one of the reasons why I will be >lurking around. I am not going to participate in emotional shouting >matches just provide documented scientific fact that is open to proper >scientific review. > > Since you wanted to respond with scientific fact, I would like to respond with real-life facts. Keep in mine I really wish that the new wing will prove to be better. I will answer each issure you raised not to kill the new wing but to give real base from with to judge. >Troy's plane N100TP old wing vis-a-vis new wing: > >1. Troy's plane is in fact a great example of a stock KR. What is different is that Troy >has spent considerable attention to reducing drag where ever possible. I submit that it is >the perfect example of a stock KR - possibly one of the best examples. Actually, just >about the only non stock thing is the gull wing door. Troy's plane with the new wing >does have a tail modification with 6" greater span and reduced elevator area. This is only going to affect stability not performance or airfoil related handling characteristics. > Troy's KR was a stock KR with shorten fixed main gear, balanced elevator, single gullwing door and original wieght of 514 lbs. >2. THe old wing stalled at 40 mph with a gentle stall. The new wing >stalls at 40 mph with a gentle stall. Neither configuration tended to >drop a wing in the stall. > Given >3. With the old wing best rate of climb was achieved at 90 mph. With the >new wing the same rate of climb is achieved at 120 mph. Better climb >efficiency with implied reduced induced drag on the new wing. > I flew with Troy a lot and he climbed 115mph with the old wing. Even with the old wing Troy's KR is the fastest and best performing KR that I ever flew with. I don't know what he cruised at but the top speed was in the mid 170s mph. >4. With the old wing, at high cruise speeds when you put the nose down it >did not tend to increase speed much implying that drag was a limiting >factor. With the new wing, at high cruise speeds when you put the nose >down it starts picking up speed rapidly implying that the wing is doing >exactly what it was designed for..cruise high and fast with low drag. > When I get full cruise speed in my KR and 'get on step', I can lower the nose maintaining the same attilude and the airspeed will slowly increase, as much as 5 or 6 mph. This has to do with airplane configuration, engine power and prop. >5. Troy did hop up his engine somewhat so it is developing more power. >More power burns more fuel. Troy is experiencing a lower fuel burn at the >same cruise speed than before implying that there is less drag than >before. Remember power cubed, drag squared? Even though the engine is >capable of developing more power he is burning less fuel for the same >cruise speed. Ashok calculated a 10% improvement here for the new wing >and Troy's flight performance supports this.. > How do you really know that he is experiencing lower fuel burn for the same cruise speed? How was it measured? With his float/Gauge? Did he lower his cruise speed to the old cruise speed to test the fuel burn rate and how long or how many hours were flown at that speed to get an accurate test? Even if he does get a better burn rate at cruise, slow speed fuel burn rate will suffer. (snip) >I don't mind criticism but only when it is based on facts or data. THis >is a scientific research and development project. If you see errors in >our data tell us. If you see voids in our testing tell us. Just be >specific. > >Steve Eberhart Steve, I don't want to put a damper on the new wing but I afraid that there are builders out there that may be hanging all of their hopes on a wing that is promissing but not yet proven. That's it. I will make no more comments concerning the new wing. Bobby Muse N122B - Wimberley, TX mailto:bmuse@mindspring.com ---------------------------------------------------------------------- Subject: UNCLE - YOU WIN BOBBY From: Steven Eberhart Date: Sat, 23 Oct 1999 22:22:27 -0500 (CDT) X-Message-Number: 16 It just isn't worth it. Steve Eberhart ---------------------------------------------------------------------- Subject: Panel Planner CD? From: EagleGator@aol.com Date: Sun, 24 Oct 1999 00:57:20 EDT X-Message-Number: 17 Is the Panel Planner CD still floating around? I'd like a chance to play with it for a while, so please drop me an email if you've got it so that I can get on the list. Thanks! I just got 3 gallons of Superfil, a gallon of Smooth Prime, and a circle cutter so I'm ready to do some more finish work and start cutting my panel. Life is good, making progress. Cheers, Rick Junkin EagleGator@aol.com St. Charles MO KR-2S N415RJ, "The Phantom Eagle", 40% complete http://members.aol.com/eaglegator ---------------------------------------------------------------------- Subject: Re: New Wing From: Michael Taglieri Date: Sun, 24 Oct 1999 00:39:52 -0400 X-Message-Number: 18 >>>I am remaining on KRnet simply to be able to respond to questions about >>>the new KRnet/UIUC wing. THis post is one of the reasons why I will be >>>lurking around. I am not going to participate in emotional shouting >>>matches just provide documented scientific fact that is open to proper >>>scientific review. . . . >>Since you wanted to respond with scientific fact, I would like to respond >>with real-life facts. . . . >It just isn't worth it. This list would be a lot more harmonious if people could just live with each others' opinions. Discarding an airfoil that a plane has been using for 25+ years doesn't happen overnight, and nobody should expect it to -- the average person will not change airfoils without a lot of evidence. That will happen when some people build the new wing, and over the next half-dozen years or so, people go to the fly-ins and take rides in each others' planes. Eventually opinions will change one way or the other, and sooner or later, one side will say, "I guess I was wrong." Maybe someday even Jeanette Rand will say that (although I'm not holding my breath). Trying to rush this process by cutting each other down on this list will lead to nothing but pain, and if one side or the other leaves the list in disgust, an eventual peace will just take longer. 99% of the plane is the same, and I hope that proponents of both wings can stay on this list and be friends and help each other build the next generation of KR's. Mike Taglieri ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj. ---------------------------------------------------------------------- Subject: Re: C.G. Indicator From: "Rick Junkin" Date: Sat, 23 Oct 1999 22:13:16 X-Message-Number: 19 On 10/23/99, ""J.R.L. Engineering Consortium Ltd." " wrote: > With all the talk about how important C.G. is in a KR, would a C.G. > Indicator be useful? I've be thinking for some time about the usefulness and > discussed it with some of my electronic engineers at GM. We think its > feasible and I my include it on my KR. It would require placement of strain > gauges on all three points of contact and simply calibrate them and send > this info through a eeprom for conditioning and display or alarm light.. > What do you think? > > KRRon Interesting idea. I'd liken it to the "oil" light in your car, it tells you that you haven't performed the necessary maintenance, or, in this case, the necessary preflight planning. As long as people didn't use something like this as a replacement for calculating/knowing the CG travel throughout each flight, I think it would serve as an "ooops" indicator that you did the CG calc wrong. I'm not aware of anything like this being used on production airplanes, but that doesn't mean it wouldn't be a good idea. What kind of weight penalty and complexity would we be talking about? --- END OF DIGEST --- You are currently subscribed to kr-net as: johnbou@timberline.com To unsubscribe send a blank email to leave-kr-net-17800J@telelists.com