KR> carbon fiber
Hay Guys, Anyone out there tell me how many yards of carbon fiber I will neen to do my wings and tail section? Robert Pesak
KR> Carbon fiber
With the possible exception being the actual control surfaces themselves, if things work out that you have to fabricate them separate. Otherwise, invest in something else that yield actual improvements, i.e. better engine, wheel pants, lighter high quality paint, Sensenich Prop, etc... Colin Rainey Licensed Mortgage Broker/Branch Manager BCR Capital Funding 386.615.3388 Home Office 407.739.0834 Cell 407.557.3260 Fax brokerpi...@bellsouth.net
KR> Carbon Fiber
Carbon fiber is my new favorite building material. ?I want to use carbon fiber to build the belly board for my KR2. ?I used the material to extend my horizontal stabilizer and I love the way it worked out. So, do you believe that one eighth inch plywood sandwiched between carbon fiber would be strong enough for a belly board 32 by 9 inches?? -How many layers??-My belly board will have 2 inch holes. ?Do I cut the holes before or after I laminate with carbon fiber? ?(Yes, our long discussions have convinced me. ?Please don't think less of me If you believe I don't need holes)-what reinforcements could I use, keeping it thin and aerodynamic. You are all awesome! Thank you. Joe Nunley?CW2 US Army RetiredBaker JROTC Instructor?Baker Florida?
KR> Carbon Fiber
>l. I want to use carbon fiber to build the belly board for my KR2. ++ I just finished my state and federal income taxes so this is an easy question. I used 1/4 inch foam for a very similar sized board with one layer of KR glass on each side and 1" holes in the board . http://myplace.frontier.com/~flesner/19.jpg The hinge is epoxied to the board (many 1/8" holes in the hinge with a strip of glass over the hinge) with 5 each 3/16" bolts holding the hinge to the fuselage. A piece of cheap 1/4" pine glued to the inside of the fuselage where the bolts penetrate. I added a foam wedge (glassed)for an air ramp just forward of the hinge. A single jack screw extends the board to near 90 degrees and it has survived in airspeeds of 110+ MPH. Larry Flesner
KR> Carbon Fiber
I made my with 3/32 birch. I followed ?Mark Langford's design and mine is as stiff as a-well you know-.?I was going to cut my holes ?after I did my flight testing.?We've had some pretty intense discussions on holes or no holes. ?So I was going to do both and document the difference. Start with no holes and then add the holes. ?I personally believe the holders are more efficient. ?Maybe we get a few of us doing that so we can figure that out. ?Holes are no holes and finally put it to rest. Paul ViskBelleville Il.618 406 4705 Sent from my Sprint Samsung Galaxy S? 6. Original message From: bjoenunley via KRnet Date: 3/21/2016 9:31 PM (GMT-06:00) To: KRnet Cc: bjoenunley Subject: KR> Carbon Fiber ??? Carbon fiber is my new favorite building material. ?I want to use carbon fiber to build the belly board for my KR2. ?I used the material to extend my horizontal stabilizer and I love the way it worked out. So, do you believe that one eighth inch plywood sandwiched between carbon fiber would be strong enough for a belly board 32 by 9 inches?? -How many layers??-My belly board will have 2 inch holes. ?Do I cut the holes before or after I laminate with carbon fiber? ?(Yes, our long discussions have convinced me. ?Please don't think less of me If you believe I don't need holes)-what reinforcements could I use, keeping it thin and aerodynamic. You are all awesome! Thank you. Joe Nunley?CW2 US Army RetiredBaker JROTC Instructor?Baker Florida? ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR>Carbon Fiber
I dont have a AS&S book or Wicks book but I know the fiberglass strength is in there. Can someone give me the strengths of KR fiberglass, The carbon fiber glass and the Kevlar. Comparing weight to strength. Has anyone used Kevlar, it is a tad cheaper than carbon fiber and said to be stronger and lighter than carbon fiber. for the 5OZ it has a tesile strength of 620X655. Can someoen explain that to me? I want to know the difference of that and normal 5.85 KR cloth. Justin KR2S
KR>Carbon Fiber
Justin Wrote: >Has anyone used Kevlar, it is a tad cheaper than carbon fiber and said to be stronger and lighter than carbon >fiber. Kevlar is not as strong when loaded in compression. It is mostly used for impact resistance rather than structural applications. Replacing fibreglass or carbon fiber with Kevlar is not a trivial excercise and requires appropriate design considerations, especially in heavily loaded applications. Hope that helps. Ameet Savant asav...@notes.state.ne.us
KR>carbon fiber/
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KR>carbon fiber/
Dave Jeltema wrote: >>Has anyone coverd the wings with either carbon or kevlar? if so how was the >>process different from glass?<< Yes, see http://home.hiwaay.net/~langford/owings.html . The only difference in using it is it's a little more difficult to tell when the fabric is completely wetted out, and you can't see through it afterward, but otherwise it's the same. Saving weight is not a good reason for using carbon fiber on wings (I know you didn't ask that question, but a previous poster did). I used it, but I had a good reason (adding torsional rigidity because I have huge flaps). The weight of 5.85 ounce carbon fiber is the same as the KR cloth that's called for in the plans, so there is no opportunity for weight reduction, except in places where there are two layers called for, and there aren't many of those on the KR. On the other hand, what carbon fiber DOES do for you is make the skin a lot tougher and stiffer, so it's less likely to deform and separate from the foam over time, and if you drop a screwdriver on your wing, it just bounces off. The canopy and/or door frame and control surfaces are one place that I would definitely use carbon fiber on, as well as the cowling. My carbon fiber cowling weighs 4 pounds complete, compared to the 14 pound fiberglass Revmaster cowling. Kevlar is another story, and I wouldn't touch that stuff with a YOUR ten foot pole. For more on that, go to the KRnet search engine at http://www.maddyhome.com/krsrch/index.jsp and enter "kevlar" as the keyword, and langf...@hiwaay.net in the FROM box, but I've enclosed one of them below. List-Post: krnet@list.krnet.org Date: Oct 19, 2000 5:37 PM From: Mark Langford Subject: Re: KR> carbon or kevlar > First of all which is better? I have 20 ydrs. of > kevlar 1.2 oz. per yd.I do not have carbon yet.The > kevlar is the same strength as 6 oz. glass. Vincent, The opportunities to save weight using carbon fiber aren't all that great, since most of the plane is covered with one layer of whatever cloth you use, and both KR glass and the CF that I used weigh the same. What you CAN get is much stronger parts. The weight savings will be in places where you use several layers, like the canopy frame or wing walks. I'd also use it on ailerons and elevators for flutter resistance. Below is something I posted a while back, again. I think there's a reason why Kevlar is so cheap. -- While I can't lay my hands on any tables of comparative strengths at the moment (I could, but I'm really not in the mood to do any more homework at the moment), from memory I'll say that carbon fiber does fail quickly, but much further up the stress/strain curve than the point at which fiberglass fails, so it is in fact stronger than glass. But you're still talking about force levels like you'd experience in a crash here. The point of using carbon fiber is reduced weight for the same strength as glass, or improved strength with the same weight. Last time I looked, 282 carbon fiber has a strength to weight ratio about 3-5 times higher than regular 7533 "KR" glass, but then it also costs 6 times as much. And let the record show that I'm not saying the KR2S even needs ANY carbon fiber, but it's a great way to make things stronger and stiffer while saving weight in the process. Also, from "Composite Aircraft Design" by Hollman: 1) "Although fiberglass is the least expensive material, graphite fibers are the most promising for aircraft structures because of their low weight, high strength, and high stiffness as shown in Figure 3. The Starship and Voyager are completely built out of graphite and honeycomb and we can expect to see more and more complete aircraft built of this material." 2) "...this is especially true for Kevlar, which has a tensile strength of 60,000 psi and a compressive strength of 23,000 psi. Because of this low compressive strength, Kevlar is almost solely used for fairings, wheel pants, engine cowls, and other fairings in aircraft structures." 3) "However, because of Kevlar's low crompression strength, Kevlar has found limited structural application in aircraft primary structures. Kevlar is difficult to work with and special tools are needed. The above quotes are not where I formed my opinion about Carbon Fiber vs Kevlar, just the first ones I came across to support my argument. Engineering data from many different sources is where I formed my "opinion". You guys are welcome to carry on this debate, but I really need to get back to the basement... --- Personally, there's no amount of benefits of Kevlar that could possibly offset the frustration of trying to work with it. That one little "tracer" thread on carbon fiber rolls has driven me almost to insanity (well, maybe ALL the way, many would argue). That thread invariably ends up on the overlapping joints where there's a material overlap (like wings). Once you sand that little thread, all the fibers stick up, and
KR> carbon fiber
Ron Smith please e-mail me off line. Mike Turner Spin the prop, light the fire, dance among the starsN428CM
KR> carbon fiber
I was looking online yesterday for good prices on carbon fiber and found this site. http://www.advancedcompositetraders.com/inven.html They have style 282 cloth for $12.50 a yard. I checked in my last years Aircraft Spruce catalog and they had 282 cloth for $25.75 a yard. This years catalog has it for $16.50 a yard. This seemed strange so I looked in Wicks and they have 282 cloth listed at $28.20 a yard and they also have a C282 commercial grade cloth for $17.19 a yard. I am assuming that the online source and ACS, at least this year, carry the commercial grade. Would anyone happen to know what the difference is? Seems that the commercial grade is 5.8 oz and the other is 5.7. I know that the commercial grade is stronger and lighter than glass so I am assuming that for a KR that there is realy no reason to go with the other type that is over twice the cost. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Ross Youngblood Sent: Saturday, May 22, 2004 7:10 PM To: kr...@mylist.net Subject: KR> N541RY listed on E-bay Howdy Netters... My KR has just been listed on E-bay as Item # 2479793898 If you know someone who is interested in a KR project, have them take a look. This one will go for thousands less than I have put into it. The Cessna Cardinal needs to be fed! -- Regards Ross -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ ___ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> carbon fiber
Brian, Most fibers used for laminating, including E and S glass and carbon fiber, have a coating applied to the individual strands to enhance the adhesion of whatever resin system would be used to glue everything together. That coating has a 5-year shelf life. My thought is if the shelf life is getting ready to expire, then the dealer would reduce the price to move that batch before it expired. The resin will not wet out old fiber very well - been there, done that. Your results may vary. Sid Wood, KR-2 N6242 Mechanicsville, MD sidney.w...@titan.com -Original Message- I was looking online yesterday for good prices on carbon fiber and found this site. http://www.advancedcompositetraders.com/inven.html They have style 282 cloth for $12.50 a yard. I checked in my last years Aircraft Spruce catalog and they had 282 cloth for $25.75 a yard. This years catalog has it for $16.50 a yard. This seemed strange so I looked in Wicks and they have 282 cloth listed at $28.20 a yard and they also have a C282 commercial grade cloth for $17.19 a yard. I am assuming that the online source and ACS, at least this year, carry the commercial grade. Would anyone happen to know what the difference is? Seems that the commercial grade is 5.8 oz and the other is 5.7. I know that the commercial grade is stronger and lighter than glass so I am assuming that for a KR that there is realy no reason to go with the other type that is over twice the cost. Brian Kraut Engineering Alternatives, Inc. www.engalt.com
KR> carbon fiber
I am sure that all three sources move enough CF that expiration is not a problem, but perhaps the commercial grade dousn't have the coating to begin with. I need to call Wicks tomorrow anyway so I will ask what the difference is since they sell both. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Wood, Sidney M. Sent: Monday, May 24, 2004 8:18 AM To: KRnet Subject: RE: KR> carbon fiber Brian, Most fibers used for laminating, including E and S glass and carbon fiber, have a coating applied to the individual strands to enhance the adhesion of whatever resin system would be used to glue everything together. That coating has a 5-year shelf life. My thought is if the shelf life is getting ready to expire, then the dealer would reduce the price to move that batch before it expired. The resin will not wet out old fiber very well - been there, done that. Your results may vary. Sid Wood, KR-2 N6242 Mechanicsville, MD sidney.w...@titan.com -Original Message- I was looking online yesterday for good prices on carbon fiber and found this site. http://www.advancedcompositetraders.com/inven.html They have style 282 cloth for $12.50 a yard. I checked in my last years Aircraft Spruce catalog and they had 282 cloth for $25.75 a yard. This years catalog has it for $16.50 a yard. This seemed strange so I looked in Wicks and they have 282 cloth listed at $28.20 a yard and they also have a C282 commercial grade cloth for $17.19 a yard. I am assuming that the online source and ACS, at least this year, carry the commercial grade. Would anyone happen to know what the difference is? Seems that the commercial grade is 5.8 oz and the other is 5.7. I know that the commercial grade is stronger and lighter than glass so I am assuming that for a KR that there is realy no reason to go with the other type that is over twice the cost. Brian Kraut Engineering Alternatives, Inc. www.engalt.com ___ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> carbon fiber
The 282 has a Kevlar Tracer, so you can see after cure the direction you did lay the cloth. If you ever have to work through that tracer, or decide to sand the surface with the tracer exposed, prepare for hell. I would use the cloth without the tracer, it will do the job. BTW, the Wicks cloth is 50" wide, that Advanced Composite Trader material is only 42" wide, which also may explain some of the price difference. As was mentioned before, C-fiber for use in resin composites are always surface coated, otherways they do no wet and do not stick to the resin. The 282 cloth is made from 3K strands, which means there are 3000 filaments per strand. It is build from a 33MSI fiber, which is the most basic carbon fiber out there. It has a tensile strength of about 500 ksi. Other grades may have higher tensile strenght, or higher tensile modulus. If you would like to learn a bit about different grades of carbon fibers, go to http://www.torayusa.com/cfa/index.htm, which is the home of Toray Carbon Fiber (America). They are, btw, one of the major suppliers to Boeing (through Toray Composites in Seattle). You find some good information about different grades of carbon fibers there. And if you go to www.torayusa.com and hit the Toray Plastics (America) (TPA) link, you can see the building I spend my weekday daytime hours in :=) Wolfgang -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Brian Kraut Sent: Monday, May 24, 2004 7:09 PM To: KRnet Subject: RE: KR> carbon fiber I am sure that all three sources move enough CF that expiration is not a problem, but perhaps the commercial grade dousn't have the coating to begin with. I need to call Wicks tomorrow anyway so I will ask what the difference is since they sell both. Brian Kraut Engineering Alternatives, Inc. www.engalt.com
KR> CARBON FIBER
Duncan It is not that carbon fiber is lighter, it is that it is 5 times stronger than the same single lay up of regular E-glass, so it would take 5 layers of E-glass to equal one layer of carbon fiber. There is where you get either light weight, when it requires strength, so you use carbon fiber in place of multiple layers of glass. If only one layer is called for you get a similar weight but alot stronger part, your choice. Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com http://kr-builder.org/Colin/index.html
KR> Carbon Fiber
Netters, Does anyone that is going to the Gathering have a 12 x 12 inch ³scrap² of carbon fiber that you would be willing to part with? If so and you are willing to bring it to Mt. Vernon, contact me off the net so we can make a deal. Mark Jones, how many more days until the Gathering? Jim Morehead Cameron Park,CA kr...@d-web.com
KR> carbon fiber skin
HI netters, Someone was skinning their plane in carbon fiber... can anyone tell me who that was? David Swanson bdazzca...@aol.com
KR> carbon fiber skin
I think mark langford did -Jeff Wilder CISSP,CCE,C/EH -BEGIN GEEK CODE BLOCK- Version: 3.1 GIT/CM/CS/O d- s:+ a C+++ UH++ P L++ E- w-- N+++ o-- K- w O- M-- V-- PS+ PE- Y++ PGP++ t+ 5- X-- R* tv b++ DI++ D++ G e* h--- r- y+++* --END GEEK CODE BLOCK-- >From: bdazzca...@aol.com >Reply-To: KRnet >To: kr...@mylist.net >Subject: KR> carbon fiber skin >Date: Sun, 25 Jun 2006 23:09:29 EDT >MIME-Version: 1.0 >Received: from lizard.esosoft.net ([38.118.200.18]) by >bay0-mc8-f12.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2444); Sun, >25 Jun 2006 20:09:44 -0700 >Received: from localhost ([127.0.0.1] helo=lizard.esosoft.net)by >lizard.esosoft.net with esmtp (Exim 4.43)id 1FuhTr-000NSY-1u; Sun, 25 Jun >2006 20:09:43 -0700 >Received: from imo-m25.mx.aol.com ([64.12.137.6])by lizard.esosoft.net with >esmtp (Exim 4.43) id 1FuhTf-000NSC-Vdfor kr...@mylist.net; Sun, 25 Jun 2006 >20:09:32 -0700 >Received: from Bdazzcamro@aol.comby imo-m25.mx.aol.com (mail_out_v38_r7.5.) >id g.484.3488afc (39953)for ; Sun, 25 Jun 2006 23:09:29 >-0400 (EDT) >X-Message-Info: LsUYwwHHNt0SUMkARdDBh23tkCH3/j0m8xHl+ZyG2w8= >X-Mailer: 8.0 for Windows sub 6811 >X-Spam-Flag: NO >X-Content-Filtered-By: Mailman/MimeDel 2.1.4 >X-BeenThere: kr...@mylist.net >X-Mailman-Version: 2.1.4 >Precedence: list >List-Id: KRnet >List-Unsubscribe: ><http://mylist.net/listinfo/krnet>,<mailto:krnet-requ...@mylist.net?subject=unsubscribe> >List-Archive: <http://mylist.net/private/krnet> >List-Post: <mailto:kr...@mylist.net> >List-Help: <mailto:krnet-requ...@mylist.net?subject=help> >List-Subscribe: ><http://mylist.net/listinfo/krnet>,<mailto:krnet-requ...@mylist.net?subject=subscribe> >Errors-To: krnet-boun...@mylist.net >Return-Path: krnet-boun...@mylist.net >X-OriginalArrivalTime: 26 Jun 2006 03:09:44.0902 (UTC) >FILETIME=[F98B6E60:01C698CD] > >HI netters, > >Someone was skinning their plane in carbon fiber... can anyone tell >me >who that was? > > > > >David Swanson >bdazzca...@aol.com >___ >Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net >please see other KRnet info at http://www.krnet.org/info.html
KR> carbon fiber skin
Hi Netters, I knew that Mark had his wings done in CF but I found someone awhile ago that was skinning his fuselage in it too. He told me what size and how many layers but cant remember who it was. Anyone know how many layers of glass Eduardo is using down there in Chile with his fuselage? David Swanson bdazzca...@aol.com
KR> carbon fiber skin
That must be an expensive KR. See N64KR at http://KRBuilder.org - Then click on the pics See you in Mt. Vernon - 2006 - KR Gathering There is a time for building and a time for FLYING and the time for building is OVER. Daniel R. Heath - Lexington, SC ---Original Message--- I found someone awhile ago that was skinning his fuselage in it too.
KR> carbon fiber skin
Not really. I was going to do the 2S in all CF. It has been a while since I figured it out, but it was only something like three or four hundred dollars more, not much over the price of the whole plane. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Dan Heath Sent: Saturday, July 01, 2006 4:46 PM To: kr...@mylist.net Subject: Re: KR> carbon fiber skin That must be an expensive KR. See N64KR at http://KRBuilder.org - Then click on the pics See you in Mt. Vernon - 2006 - KR Gathering There is a time for building and a time for FLYING and the time for building is OVER. Daniel R. Heath - Lexington, SC ---Original Message--- I found someone awhile ago that was skinning his fuselage in it too. ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> carbon fiber material
Hay Mark, I'm getting ready to order my carbon fiber,I know you used cf on your wings and it seems your happy with them.I guess the question I have is,How many layers did you lay up, and what weight did you use? I think I'll just order it from Wicks @ 33.12 per yard unless you can think of a better plan. Thanks. Robert Pesak Hermitage, Tn.
KR> Carbon fiber sources
Does anyone have a favorite source for carbon fiber cloth?? I can tolerate cloth with defects, I.e. broken threads, to keep the cost down.? Years ago someone posted a source for seconds. On Jul 19, 2014 6:28 AM, Steven Eberhart via KRnet wrote: > > I know, this is in an RV but it is a pretty neat Corvair conversion in > the true Area 51 tradition. > > http://www.vansairforce.com/community/showthread.php?t=115396 > > Steve Eberhart > Played around with some KR stuff in the past. > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Carbon fiber sources
This is were I got mine. I'm very happy with them. Very good service and quality and cost.? http://www.carbonfiberdeals.com Paul Visk Belleville Il 618 406 4705 Sent on the new Sprint Network from my Samsung Galaxy S?4. Original message From: Steven Eberhart via KRnet Date:08/07/2014 9:24 AM (GMT-06:00) To: Steven Eberhart via KRnet Subject: KR> Carbon fiber sources Does anyone have a favorite source for carbon fiber cloth? I can tolerate cloth with defects, I.e. broken threads, to keep the cost down. Years ago someone posted a source for seconds. On Jul 19, 2014 6:28 AM, Steven Eberhart via KRnet wrote: > > I know, this is in an RV but it is a pretty neat Corvair conversion in > the true Area 51 tradition. > > http://www.vansairforce.com/community/showthread.php?t=115396 > > Steve Eberhart > Played around with some KR stuff in the past. > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Carbon Fiber Seat
Dean, Your aircraft seat is much more elegant and weight saving than the lead lumps that I have permanently bonded to my floor pan. Please keep us advised of your progress on the backboard. Jim Vance
KR> Carbon Fiber interference
Netters, I am working up my horizontal and vertical stabilizers and was planning to use Carbon Fiber to cover at least the control surfaces and maybe the entire tail. A couple of people have mentioned that carbon fiber interferes with radio signals. Any way to avoid this? Other thoughts? Dean Cooper Jacksonville, FL Email me at dean_coo...@bellsouth.net See my KR project at www.geocities.com/djramccoop1/KR2_Home.html
KR> Carbon Fiber interference
From what I have been able to glean from various articles and talking with several radio techs, the only around the problem is external antennae. I plan on using Kevlar for high stress areas and "S-glass" for the rest. Doug Rupert A couple of people have mentioned that carbon fiber interferes with radio signals. Any way to avoid this? Other thoughts? Dean Cooper
KR> Carbon Fiber and Metal
Why do you need to isolate carbon fiber and metal? Will stainless steel hardware work ok? Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA --- >> This is an example of the problem with many KR messages...a few words >> dashed off in a sentence or two that leave many questions unanswered, >> and probably some worthy KR projects sent to the dump as a result... >> >> Mark Langford >> ML at N56ML.com > > With carbon fiber it is important to isolate it from any metal with a > layer > of fiberglass or something. > > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of jon kimmel >
KR> Carbon Fiber and Metal
Sid Wood wrote: Metal corrosion is often the result of galvanic activity between dissimilar metals. Carbon Fiber conducts electricity and acts like a metal. When carbon fiber and metal are in contact, galvanic action will cause the metal to corrode. Stainless steel is resistant to corrosion but not totally. Why take a chance - separate metal from carbon fiber - use a layer of fiberglass. Dave McCauley > > With carbon fiber it is important to isolate it from any metal with a > layer of fiberglass or something. > > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of jon > kimmel > ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Carbon Fiber and Metal
Graphite is the most corrosive material on the galvanic tables...it will cause just about anything except gold corrode...just put a layer of something in between to prevent it from conducting across. https://sites.google.com/site/mykr2stretch/ https://sites.google.com/site/mykr2stretch/parts-for-sale On Dec 29, 2013 1:25 PM, "smwood" wrote: > Why do you need to isolate carbon fiber and metal? Will stainless steel > hardware work ok? > > Sid Wood > Tri-gear KR-2 N6242 > Mechanicsville, MD, USA > --- > >> This is an example of the problem with many KR messages...a few words >>> dashed off in a sentence or two that leave many questions unanswered, >>> and probably some worthy KR projects sent to the dump as a result... >>> >>> Mark Langford >>> ML at N56ML.com >>> >> > >> >> With carbon fiber it is important to isolate it from any metal with a >> layer >> of fiberglass or something. >> >> From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of jon kimmel >> >> > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Carbon Fiber and Metal
Graphite is the most corrosive material on the galvanic tables...it will cause just about anything except gold corrode...just put a layer of something in between to prevent it from conducting across. https://sites.google.com/site/mykr2stretch/ https://sites.google.com/site/mykr2stretch/parts-for-sale On Dec 29, 2013 1:25 PM, "smwood" wrote: > Why do you need to isolate carbon fiber and metal? Will stainless steel > hardware work ok? > > Sid Wood > Tri-gear KR-2 N6242 > Mechanicsville, MD, USA > --- > >> This is an example of the problem with many KR messages...a few words >>> dashed off in a sentence or two that leave many questions unanswered, >>> and probably some worthy KR projects sent to the dump as a result... >>> >>> Mark Langford >>> ML at N56ML.com >>> >> > >> >> With carbon fiber it is important to isolate it from any metal with a >> layer >> of fiberglass or something. >> >> From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of jon kimmel >> >> > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Carbon Fiber speed brake
KR> Carbon Fiber speed brake
Let me try that again...this time as "plain text" so it won't post a blank. Paul Visk wrote: >>I made my with 3/32 birch. I followed Mark Langford's design... Not quite...mine was made from 1/4" Lastofoam, rather than plywood. I'll bet it's even stiffer than an eighth inch plywood base, as the distance between the two carbon fiber sides gives it a very high moment of inertia. I'm sure everybody's seen it already, but http://www.n56ml.com/n891jf/speedbrake/ shows exactly how mine was made. I've deployed it up to 120 mph with no problems, so it is tested and makes a huge difference in slowing the airplane down, as well as improving the view over the nose. If I forget to retract it after landing, I have to give it a lot more power to taxi fast! Mark Langford, Harvest, AL ML "at" N56ML.com www.N56ML.com
KR> Carbon Fiber speed brake
KR> Carbon Fiber speed brake
Just shoot me. I have to figure out how to make "plain text" the default on this goofy web interface, if it's possible. See below... I should add to this that given that you are putting holes in it, plywood core does make perfect sense, and I would laminate it all together and then cut the holes. That's a lot easier than the other way, and it'll work fine. Mark Langford, Harvest, AL ML "at" N56ML.com www.N56ML.com
KR> Carbon Fiber speed brake
> >I should add to this that given that you are putting holes in it, >plywood core does make perfect sense, and I would laminate it all >together and then cut the holes. That's a lot easier than the other >way, and it'll work fine. >Mark Langford ++ Mine has holes and is a foam core (1/4") so I know the foam with holes will work. I'm with Mark on "build the board then cut the holes". Larry Flesner
KR> Carbon Fiber speed brake
I would use a mico flox mixture to seal the edges of the holes. Paul ViskBelleville Il618 406 4705 Sent from my Sprint Samsung Galaxy S? 6. Original message From: Larry Flesner via KRnet Date: 3/22/2016 11:29 AM (GMT-06:00) To: KRnet Cc: Larry Flesner Subject: Re: KR> Carbon Fiber speed brake > >I should add to this that given that you are putting holes in it, >plywood core does make perfect sense, and I would laminate it all >together and then cut the holes.? That's a lot easier than the other >way, and it'll work fine. >Mark Langford ++ Mine has holes and is a foam core (1/4") so I know the foam with holes will work.? I'm with Mark on "build the board then cut the? holes". Larry Flesner ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR>Carbon Fiber for Justin
I dont have a AS&S book or Wicks book but I know the fiberglass strength is in there. Can someone give me the strengths of KR fiberglass, The carbon fiber glass and the Kevlar. Comparing weight to strength. Has anyone used Kevlar, it is a tad cheaper than carbon fiber and said to be stronger and lighter than carbon fiber. for the 5OZ it has a tesile strength of 620X655. Can someoen explain that to me? I want to know the difference of that and normal 5.85 KR cloth. Justin KR2S Justin, just use the door skin plywood from Home Depot Ron Freiberger mailto: rfreiber...@swfla.rr.com
KR>Carbon Fiber for Justin
Justin, I for one, am very pleased to see such an inquisitive mind concerning aviation. It is young fellows such as yourself that keeps aviation going when us old farts are all gone. Mind you, I am only 47 so I plan on being around for quite some time. You remind me of my oldest son when he was 16, full of questions and never satisfied with a simple answer and always wanting to reinvent things. Well, my oldest son is now 26 and an Engineer Graduate of Georgia Tech, with honors I might add. I am told you are 16 to 17 years old and I think you are on track to being a great addition to the aviation world. There have been a lot of flames against you for asking questions which have obvious answers or easy sources to find the answers. For those who have flamed you, I think you deserve an apology. For those who have helped you, they need to be thanked. For those who were just picking at you...well, I hope they remember what it was like when they started aviation and especially building a plane. And, I am willing to bet none of them were 16 when they took on such an enormous task as building an airplane. Justin, keep asking your questions, keep learning, keep progressing and one day we will all be patting you on the back for doing such a good job. Never give up on your dream, and never let your dream give up on you. Keep it up and make us all proud to be associated with such an inquisitive mind. I see another engineer in the making!!! Mark Jones (N886MJ) Wales, WI USA E-mail me at flyk...@wi.rr.com Visit my KR-2S CorvAIRCRAFT web site at http://mywebpage.netscape.com/n886mj/homepage.html Subject: RE: KR>Carbon Fiber for Justin > I dont have a AS&S book or Wicks book but I know the fiberglass strength is > in there. Can someone give me the strengths of KR fiberglass, The carbon > fiber glass and the Kevlar. Comparing weight to strength. > > Has anyone used Kevlar, it is a tad cheaper than carbon fiber and said > to be stronger and lighter than carbon fiber. for the 5OZ it has a tesile > strength of 620X655. Can someoen explain that to me? I want to know the > difference of that and normal 5.85 KR cloth. > > Justin > KR2S >> > > ___ > see KRnet list details at http://www.krnet.org/instructions.html >
KR>Carbon Fiber for Justin
Mark, Well said, my congratulations to you. The morons who flamed that kid aught to have their ass's kicked. Now all of you dumb jackass's who flamed that kid, flame me and see if I give a dam. Bob Stone, Harker Heights, TX rsto...@hot.rr.com - Original Message - From: "Mark Jones" To: "KR builders and pilots" Sent: Wednesday, June 18, 2003 7:45 PM Subject: Re: KR>Carbon Fiber for Justin > Justin, > I for one, am very pleased to see such an inquisitive mind concerning > aviation. It is young fellows such as yourself that keeps aviation going > when us old farts are all gone. Mind you, I am only 47 so I plan on being > around for quite some time. You remind me of my oldest son when he was 16, > full of questions and never satisfied with a simple answer and always > wanting to reinvent things. Well, my oldest son is now 26 and an Engineer > Graduate of Georgia Tech, with honors I might add. I am told you are 16 to > 17 years old and I think you are on track to being a great addition to the > aviation world. There have been a lot of flames against you for asking > questions which have obvious answers or easy sources to find the answers. > For those who have flamed you, I think you deserve an apology. For those who > have helped you, they need to be thanked. For those who were just picking at > you...well, I hope they remember what it was like when they started aviation > and especially building a plane. And, I am willing to bet none of them were > 16 when they took on such an enormous task as building an airplane. Justin, > keep asking your questions, keep learning, keep progressing and one day we > will all be patting you on the back for doing such a good job. Never give up > on your dream, and never let your dream give up on you. Keep it up and make > us all proud to be associated with such an inquisitive mind. I see another > engineer in the making!!! > > Mark Jones (N886MJ) > Wales, WI USA > E-mail me at flyk...@wi.rr.com > Visit my KR-2S CorvAIRCRAFT web site at > http://mywebpage.netscape.com/n886mj/homepage.html > > > Subject: RE: KR>Carbon Fiber for Justin > > > > I dont have a AS&S book or Wicks book but I know the fiberglass strength > is > > in there. Can someone give me the strengths of KR fiberglass, The carbon > > fiber glass and the Kevlar. Comparing weight to strength. > > > > Has anyone used Kevlar, it is a tad cheaper than carbon fiber and said > > to be stronger and lighter than carbon fiber. for the 5OZ it has a tesile > > strength of 620X655. Can someoen explain that to me? I want to know the > > difference of that and normal 5.85 KR cloth. > > > > Justin > > KR2S > >> > > > > ___ > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > > ___ > see KRnet list details at http://www.krnet.org/instructions.html >
KR>Carbon Fiber for Justin
Thanks Mark, and Robert.Cheered me up for the night A hanger buddy and myself went over carbon fiber compared to KR fiberglass. The results are simple. The weight savings for the entire airplane will be aprox 7lbs and abotu 4X the cost. The entire airplane's fiberglass is around 25 but around 18 with carbon fiber. That seems a minal weight difference to pay 4X as much. If im missing something could I be cleared up. I know Mark L has used carbon fiber for his wings and other parts. Justin KR2S- Varnishing the fuselage - Original Message - From: "Mark Jones" To: "KR builders and pilots" Sent: Wednesday, June 18, 2003 7:45 PM Subject: Re: KR>Carbon Fiber for Justin > Justin, > I for one, am very pleased to see such an inquisitive mind concerning > aviation. It is young fellows such as yourself that keeps aviation going > when us old farts are all gone. Mind you, I am only 47 so I plan on being > around for quite some time. You remind me of my oldest son when he was 16, > full of questions and never satisfied with a simple answer and always > wanting to reinvent things. Well, my oldest son is now 26 and an Engineer > Graduate of Georgia Tech, with honors I might add. I am told you are 16 to > 17 years old and I think you are on track to being a great addition to the > aviation world. There have been a lot of flames against you for asking > questions which have obvious answers or easy sources to find the answers. > For those who have flamed you, I think you deserve an apology. For those who > have helped you, they need to be thanked. For those who were just picking at > you...well, I hope they remember what it was like when they started aviation > and especially building a plane. And, I am willing to bet none of them were > 16 when they took on such an enormous task as building an airplane. Justin, > keep asking your questions, keep learning, keep progressing and one day we > will all be patting you on the back for doing such a good job. Never give up > on your dream, and never let your dream give up on you. Keep it up and make > us all proud to be associated with such an inquisitive mind. I see another > engineer in the making!!! > > Mark Jones (N886MJ) > Wales, WI USA > E-mail me at flyk...@wi.rr.com > Visit my KR-2S CorvAIRCRAFT web site at > http://mywebpage.netscape.com/n886mj/homepage.html > > > Subject: RE: KR>Carbon Fiber for Justin > > > > I dont have a AS&S book or Wicks book but I know the fiberglass strength > is > > in there. Can someone give me the strengths of KR fiberglass, The carbon > > fiber glass and the Kevlar. Comparing weight to strength. > > > > Has anyone used Kevlar, it is a tad cheaper than carbon fiber and said > > to be stronger and lighter than carbon fiber. for the 5OZ it has a tesile > > strength of 620X655. Can someoen explain that to me? I want to know the > > difference of that and normal 5.85 KR cloth. > > > > Justin > > KR2S > >> > > > > ___ > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > > ___ > see KRnet list details at http://www.krnet.org/instructions.html
KR>carbon fiber gear legs
> I know that carbon graphite can be brittle. I think it could build it strong enough but would it be springy enough? Carbon fiber is known for it's stiffness, but what you want in a gear leg is just the opposite. I don't know of anybody that's using a carbon fiber gear leg, and that alone is good enough for me. Fiberglass works great, as as has been demonstrated by the canard guys and most KRs as well. It's also cheaper. I'd stick with fiberglass or aluminum, personally. > I saw that someone made a tail spring in this manner and it got me thinking. That tail spring is Jim Faughn's. Actually, the core is fiberglass (maybe a golf flag pole?) and broke at the Gathering. I was the only guy that had any kind of composite, and it happened to be carbon fiber. I think we wrapped about four layers of 5.85 ounce CF around it We thought it was a temporary fix, but it's still working today... Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net --
KR> Carbon Fiber Carburetor Air Intake
I was working in the hangar tonight and took a few more pictures of the carbon fiber air intake that I made. The front of the carb heat box has a K&N tapered air filter on it and the air intake was laid up in such a way that it slips on tight over the back flange of the filter but has a gap of 1/4" all around the front of the air filter. The air filter is also open on the front end as you can see in the pictures so it not only gets air in the front but also all around the sides as it was designed for. I think the scoop came out pretty well although I've got some filling and sanding to do to it. Check out the pictures if you're interested at my web site: http://www.sharkdriver.zoomshare.com. The pictures are in the "carb heat box" album. It was cold in the hangar but with the 10' X 20' portable garage that my wife bought me last Christmas over the fuselage I can heat it warm enough with a salamander kerosene heater so that a couple of sweatshirts make it comfortable. It is 23 degrees outside, but inside I had it up into the 50's. It makes it workable all winter long here in northwest Ohio. The discussion on radio antenna's has been interesting although I made mine from the RST Engineering kit like Mark Langford did his. I can receive Indy Center from inside my hangar and it's 150 miles away. The lower section of the copper tape I wrapped barber pole style around a plastic 1/4" sink supply line so that it would fit the full length down into the fuselage and hot glued the upper end of the tube to the bottom of the lower vertical stabilizer rib right where the antenna cable attaches. It worked great and I think that this antenna will do fine. I bought a 15' piece of military surplus antenna cable with the fittings already on it for $9.00 so I have about $37.00 total in my antenna and cable. Neal Hornung E-mail: lt1corve...@earthlink.net EarthLink Revolves Around You.
KR> Carbon Fiber Carburetor Air Intake
> I was working in the hangar tonight and took a few more pictures of the > carbon fiber air intake that I made. Nice looking setup, but I need to ask. Are those wood spacers between the engine mount and the fire wall? -- Eric Pitts Terre Haute Ind. http://eric.pitts.mystarband.net "Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, chocolate in one hand, body thoroughly used up, totally worn out and screaming "WOO HOO what a ride!"
KR> Carbon Fiber Carburetor Air Intake
Neal, I have been viewing your construction pictures this morning as I sit out this cold weather. I just wanted to say that you have put together some really great construction pics that are not only great to look at for someone that is not in the construction phase, but also a great resource for those who are in the construction phase who need some hints as to how do I do this and how do I do that? Great visual ads. Jeff York N839BG Lexington, KY. Georgetown Scott County Airport Hanger A5
