From: To: Subject: KRnet Digest, Vol 133, Issue 1 Date: Wednesday, August 20, 2003 12:02 PM Send KRnet mailing list submissions to krnet@mylist.net To subscribe or unsubscribe via the World Wide Web, visit http://mylist.net/listinfo/krnet or, via email, send a message with subject or body 'help' to krnet-request@mylist.net You can reach the person managing the list at krnet-owner@mylist.net When replying, please edit your Subject line so it is more specific than "Re: Contents of KRnet digest..." Today's Topics: 1. Re: Question (larry severson) 2. Re: plywood vs composite skins (Brian Kraut) 3. Turtledeck heigth (William Clapp) 4. Re: plywood vs composite skins (Eduardo M. Iglesias) 5. Re: Turtledeck heigth (Louis Staalberg) 6. RE: plywood vs composite skins (Alexander Birca (MD/RMD)) 7. Isn't that PCB idea great? (Serge F. Vidal) 8. RE: Isn't that PCB idea great? (Alexander Birca (MD/RMD)) 9. Re: Isn't that PCB idea great? (Robert Stone) 10. RE: Isn't that PCB idea great? (Alexander Birca (MD/RMD)) 11. Re: Question (gleone) 12. Re: Isn't that PCB idea great? (Mike Turner) 13. RE: Isn't that PCB idea great? (Alexander Birca (MD/RMD)) 14. Re: Isn't that PCB idea great? (Dennis Mingear) 15. Re: new KR builder - spar question (Mike Turner) ---------------------------------------------------------------------- Date: Tue, 19 Aug 2003 17:38:49 -0700 From: larry severson To: KR builders and pilots Subject: Re: KR>Question Message-ID: <5.2.1.1.0.20030819173720.00af3648@pop-server.socal.rr.com> In-Reply-To: <3F40E0AC.000007.01008@bce-kfbivsogxl9> References: <20030817.210319.2872.1.virgnvs@juno.com> Content-Type: text/plain; charset="us-ascii"; format=flowed MIME-Version: 1.0 Precedence: list Message: 1 I would be interested in how you are adding the wing length. At 08:20 AM 8/18/2003 -0600, you wrote: >I'm building a KR-1 >and am extending the wings a couple of feet either directly or through >winglettes (still undecided which way I want to go: >Gene > > > >-------Original Message------- Larry Severson Fountain Valley, CA 92708 (714) 968-9852 larry2@socal.rr.com ------------------------------ Date: Tue, 19 Aug 2003 22:42:50 -0400 From: Brian Kraut To: KR builders and pilots Subject: Re: KR>plywood vs composite skins Message-ID: <3F42E02A.2010905@earthlink.net> References: Content-Type: text/plain; charset=us-ascii; format=flowed MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 2 I am very familiar with printed circuit boards and most of the ones I have seen are a little light on the glass and heavy on the epoxy, but there are a zillion different kinds. Alexander Birca (MD/RMD) wrote: > Hi all, >I know, some time ago here was discussed this question. But there were talking about sides skins to be laminated. For me here is clear, I will do as Eduardo Barros from Argentina. > I would like to ask your opinion about composite sheet which is used for Printed Circuit Board, of course without cooper. >This kind of material I am planning to use just on the spars. Why not plywood, I simple can not obtain it here (aircraft grade) and I would like to avoid using of plywood. But I have this PCB sheet in 2mm thickness, it has about 10 layers of laminated fibers which is pressed together and cooked. Compared with plywood it is much stronger, although there could be some weight penalty (just a little), which is not significant. Any idea? I hope you will understand my question, sorry for my English. > > BR, >Alex > >_______________________________________________ >see KRnet list details at http://www.krnet.org/instructions.html > ------------------------------ Date: Tue, 19 Aug 2003 22:58:12 -0400 From: "William Clapp" To: "KR builders and pilots" Subject: KR>Turtledeck heigth Message-ID: <003f01c366c6$e5aec5e0$10fcd241@clapp> Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: list Message: 3 Last week I sent out a question about the heigth of the turtledeck and = canopy. I tried the sit in the plane - level on head and measure = heigth and I came up with 17.5" for my head to barely clear.. What I = wanted to see was a response from someone in the way of a measured = heigth from the longeron to the top of the turtledeck at the point = behind the back seat. I know everyone's may be a little different but I = am interested in this for a couple reasons. 1) How much variation is = there out there between heigths 2) Does anybody have info about how = much the heigth affects speed? 3) How does heigth affect = rudder/elevator control... I want to keep my plane streamline but if a couple inches for = comfort sake due not affect controlability or speed much then I take = comfort... Some photos Ive seen make it look like some canopies are = only inches above the longerons and others seem really "bubbly". =20 My fore deck is made and am ready to make rear bulkheads and layup = the turtledeck........ Does anybody know where to find 6" urethane foam ? =20 Happy building - Bill ------------------------------ Date: Wed, 20 Aug 2003 00:07:46 -0300 From: "Eduardo M. Iglesias" To: "KR builders and pilots" Subject: Re: KR>plywood vs composite skins Message-ID: <007c01c366c9$54d7e300$d862fea9@portatil> References: Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 4 Dan, Alex. Eduardo Barros put 3 layers of bid and epoxi in the exterior side and one in the interior of the fuselage. Mark Langford has more information about. Have a good work Eduardo Iglesias La Pampa Argentina ----- Original Message ----- From: "Alexander Birca (MD/RMD)" To: "'KR builders and pilots'" Sent: Tuesday, August 19, 2003 7:20 AM Subject: RE: KR>plywood vs composite skins > > Thanks Dan, > I have to say it is not brittle, as about gluing, before it should be sanded, as ordinary Fiberglas. In fact it is a Fiberglas, just difference is in that the fiberglass layers are pressed and cooked at high temperature vs ours wing skins are not pressed and normally cure at room temperature. > > I am not from Argentina, I just mentioned Eduardo Barros site. > > BR, > Alex Birca > Moldova > > > Alex, > I am sure that it is strong, but I am concerned that it would be brittle > and under stress could crack. I would not use it on a spar for sure. I > also question how well it will adhere to another material. > > I am not saying "don't use it", what I am saying is "I would not use it". > > What material are other builders in Argentina using? > > N64KR > Daniel R. Heath - Columbia, SC > > > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > --- > [This E-mail scanned for viruses by Declude Virus] > > --- [This E-mail scanned for viruses by Declude Virus] ------------------------------ Date: Tue, 19 Aug 2003 20:24:07 -0700 From: "Louis Staalberg" To: "KR builders and pilots" Subject: Re: KR>Turtledeck heigth Message-ID: <001301c366ca$8488f160$0200a8c6@toshiba> References: <003f01c366c6$e5aec5e0$10fcd241@clapp> Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 5 From: "William Clapp" To: "KR builders and pilots" Sent: Tuesday, August 19, 2003 07:58 PM Subject: KR>Turtledeck heigth < What I wanted to see was a response from someone in the way of a measured To: "'KR builders and pilots'" Subject: RE: KR>plywood vs composite skins Message-ID: Content-Type: text/plain; charset="ISO-8859-1" MIME-Version: 1.0 Precedence: list Message: 6 Thanks Eduardo, good info. BR, Alex Birca Moldova -----Original Message----- From: Eduardo M. Iglesias [mailto:emiglesias@cpenet.com.ar] Sent: Wednesday, August 20, 2003 6:08 AM To: KR builders and pilots Subject: Re: KR>plywood vs composite skins Dan, Alex. Eduardo Barros put 3 layers of bid and epoxi in the exterior side and one in the interior of the fuselage. Mark Langford has more information about. Have a good work Eduardo Iglesias La Pampa Argentina ----- Original Message ----- From: "Alexander Birca (MD/RMD)" To: "'KR builders and pilots'" Sent: Tuesday, August 19, 2003 7:20 AM Subject: RE: KR>plywood vs composite skins > > Thanks Dan, > I have to say it is not brittle, as about gluing, before it should be sanded, as ordinary Fiberglas. In fact it is a Fiberglas, just difference is in that the fiberglass layers are pressed and cooked at high temperature vs ours wing skins are not pressed and normally cure at room temperature. > > I am not from Argentina, I just mentioned Eduardo Barros site. > > BR, > Alex Birca > Moldova > > > Alex, > I am sure that it is strong, but I am concerned that it would be brittle > and under stress could crack. I would not use it on a spar for sure. I > also question how well it will adhere to another material. > > I am not saying "don't use it", what I am saying is "I would not use it". > > What material are other builders in Argentina using? > > N64KR > Daniel R. Heath - Columbia, SC > > > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > --- > [This E-mail scanned for viruses by Declude Virus] > > --- [This E-mail scanned for viruses by Declude Virus] _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ Date: Wed, 20 Aug 2003 10:16:01 +0100 From: "Serge F. Vidal" To: "'KR builders and pilots'" Subject: KR>Isn't that PCB idea great? Message-ID: <000701c366fb$f70a55e0$2c0101c0@ate.com> In-Reply-To: Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 7 Netters, What I really like about the KRNet is the incredible amount of creativity that we manage to pool together. I think that PCB idea is a perfect example. Indeed, it is fiberglass, of the best kind (multiple laminations). And I think it is the first time somebody tries to use it as an aircraft material, but surely, it can't be worse than our usual home-made, first-time builder fiberglass! Now, if somebody with a good knowledge of material properties could study typical PCB sheets to compare its properties with plywood and fiberglass, I think it would not be wasted effort. How much does PCB sheet cost, by the way? Serge Vidal KR2 ZS-WEC Johannesburg, South Africa ------------------------------ Date: Wed, 20 Aug 2003 12:39:39 +0200 From: "Alexander Birca (MD/RMD)" To: "'serge.vidal@ate-international.com'" , "'KR builders and pilots'" Subject: RE: KR>Isn't that PCB idea great? Message-ID: Content-Type: text/plain; charset="ISO-8859-1" MIME-Version: 1.0 Precedence: list Message: 8 Thanks Serge, you understand me right. That is, now I am waiting more opinion on this issue. I do not know how much it cost some where, but for me here it is not expensive (~4$ for 1kg), though I can't find aircraft grade plywood at all. Again, I want to use it just for the spars, so, the weight penalty is not so important due of small quantity. But I guess it could be used for boat as well. BR, Alex Birca Moldova -----Original Message----- From: Serge F. Vidal [mailto:serge.vidal@ate-international.com] Sent: Wednesday, August 20, 2003 12:16 PM To: 'KR builders and pilots' Subject: KR>Isn't that PCB idea great? Netters, What I really like about the KRNet is the incredible amount of creativity that we manage to pool together. I think that PCB idea is a perfect example. Indeed, it is fiberglass, of the best kind (multiple laminations). And I think it is the first time somebody tries to use it as an aircraft material, but surely, it can't be worse than our usual home-made, first-time builder fiberglass! Now, if somebody with a good knowledge of material properties could study typical PCB sheets to compare its properties with plywood and fiberglass, I think it would not be wasted effort. How much does PCB sheet cost, by the way? Serge Vidal KR2 ZS-WEC Johannesburg, South Africa _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ Date: Wed, 20 Aug 2003 06:49:53 -0500 From: "Robert Stone" To: "KR builders and pilots" Subject: Re: KR>Isn't that PCB idea great? Message-ID: <000601c36711$2bf223e0$ba21f218@hot.rr.com> References: Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 9 Where in the world is Moldova????? ----- Original Message ----- From: "Alexander Birca (MD/RMD)" To: ; "'KR builders and pilots'" Sent: Wednesday, August 20, 2003 5:39 AM Subject: RE: KR>Isn't that PCB idea great? > Thanks Serge, you understand me right. > That is, now I am waiting more opinion on this issue. > I do not know how much it cost some where, but for me here it is not expensive (~4$ for 1kg), though I can't > find aircraft grade plywood at all. Again, I want to use it just for the spars, so, the weight penalty > is not so important due of small quantity. But I guess it could be used for boat as well. > > BR, > Alex Birca > Moldova > -----Original Message----- > From: Serge F. Vidal [mailto:serge.vidal@ate-international.com] > Sent: Wednesday, August 20, 2003 12:16 PM > To: 'KR builders and pilots' > Subject: KR>Isn't that PCB idea great? > > > Netters, > > What I really like about the KRNet is the incredible amount of creativity > that we manage to pool together. > > I think that PCB idea is a perfect example. Indeed, it is fiberglass, of the > best kind (multiple laminations). And I think it is the first time somebody > tries to use it as an aircraft material, but surely, it can't be worse than > our usual home-made, first-time builder fiberglass! > > Now, if somebody with a good knowledge of material properties could study > typical PCB sheets to compare its properties with plywood and fiberglass, I > think it would not be wasted effort. > > How much does PCB sheet cost, by the way? > > Serge Vidal > KR2 ZS-WEC > Johannesburg, South Africa > > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > ------------------------------ Date: Wed, 20 Aug 2003 13:57:26 +0200 From: "Alexander Birca (MD/RMD)" To: "'Robert Stone'" , "'KR builders and pilots'" Subject: RE: KR>Isn't that PCB idea great? Message-ID: Content-Type: text/plain; charset="ISO-8859-1" MIME-Version: 1.0 Precedence: list Message: 10 Robert, you will not believe, but it is a real country :-) Just that it is a ve-e-ery small. A exUSSR republic, have a look on the map, between Romanian and Ukraine. Do not ask where is Romania and Ukraine :-) BR, Alex Birca Moldova -----Original Message----- From: Robert Stone [mailto:rstone4@hot.rr.com] Sent: Wednesday, August 20, 2003 2:50 PM To: KR builders and pilots Subject: Re: KR>Isn't that PCB idea great? Where in the world is Moldova????? ------------------------------ Date: Wed, 20 Aug 2003 09:00:00 -0600 (Mountain Standard Time) From: "gleone" To: Subject: Re: KR>Question Message-ID: <3F438CF0.000001.02776@DDMWDD11> References: <5.2.1.1.0.20030819173720.00af3648@pop-server.socal.rr.com> Content-Type: Text/Plain MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: list Message: 11 Larry,=0D =0D The easiest way is to spend a little extra buying longer wood.=20 Alternatively, you could add 12 inches to the wing spars. The standard K= R-1 wing is 17 feet long with wood enough to build it 17.5. Adding a foot to the spar will give nearly a 20 foot wingspan. Winglettes will work, too.= I m running a dry wing and only the header tank. Finished, I expect the pl= ane to be within 50# of the design weight.=0D =0D =0D -------Original Message-------=0D =0D From: KR builders and pilots=0D Date: Tuesday, August 19, 2003 18:40:40=0D To: KR builders and pilots=0D Subject: Re: KR>Question=0D =0D I would be interested in how you are adding the wing length.=0D =0D At 08:20 AM 8/18/2003 -0600, you wrote:=0D >I'm building a KR-1=0D >and am extending the wings a couple of feet either directly or through=0D >winglettes (still undecided which way I want to go:=0D >Gene=0D >=0D >=0D >=0D >-------Original Message-------=0D =0D Larry Severson=0D Fountain Valley, CA 92708=0D (714) 968-9852=0D larry2@socal.rr.com=0D =0D =0D _______________________________________________=0D see KRnet list details at http://www.krnet.org/instructions.html=0D =0D =2E ------------------------------ Date: Wed, 20 Aug 2003 10:30:47 -0500 From: "Mike Turner" To: "KR builders and pilots" , "'Robert Stone'" Subject: Re: KR>Isn't that PCB idea great? Message-ID: References: Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: list Message: 12 I would think the PBC would have the same strength or better than = the plywood but I would want to know what kind of resin was used in the = manafacture of the PBC. If it's made from a vinal ester product, then = that's what I would use to glue it to the wood. If it's made from an = epoxy resin I would use an epoxy resin glue. It's not a question of the = type of glue used for the wood, it has to do with the bonding properties = between the glue and the PBC. Mike Turner ----- Original Message -----=20 From: Alexander Birca (MD/RMD)=20 To: 'Robert Stone' ; 'KR builders and pilots'=20 Sent: Wednesday, August 20, 2003 6:57 AM Subject: RE: KR>Isn't that PCB idea great? Robert, you will not believe, but it is a real country :-) Just that it is a ve-e-ery small. A exUSSR republic, have a look=20 on the map, between Romanian and Ukraine. Do not ask where is Romania and Ukraine :-) BR, Alex Birca Moldova -----Original Message----- From: Robert Stone [mailto:rstone4@hot.rr.com] Sent: Wednesday, August 20, 2003 2:50 PM To: KR builders and pilots Subject: Re: KR>Isn't that PCB idea great? Where in the world is Moldova????? _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ Date: Wed, 20 Aug 2003 17:36:23 +0200 From: "Alexander Birca (MD/RMD)" To: "'KR builders and pilots'" Subject: RE: KR>Isn't that PCB idea great? Message-ID: Content-Type: text/plain; charset="ISO-8859-1" MIME-Version: 1.0 Precedence: list Message: 13 Usually is used two type of resin, epoxy or phenolic. In my case it is epoxy. For PCB production is used only epoxy. BR, Alex Birca Moldova -----Original Message----- From: Mike Turner [mailto:aviator42@msn.com] Sent: Wednesday, August 20, 2003 6:31 PM To: KR builders and pilots; 'Robert Stone' Subject: Re: KR>Isn't that PCB idea great? I would think the PBC would have the same strength or better than the plywood but I would want to know what kind of resin was used in the manafacture of the PBC. If it's made from a vinal ester product, then that's what I would use to glue it to the wood. If it's made from an epoxy resin I would use an epoxy resin glue. It's not a question of the type of glue used for the wood, it has to do with the bonding properties between the glue and the PBC. Mike Turner ----- Original Message ----- From: Alexander Birca (MD/RMD) To: 'Robert Stone' ; 'KR builders and pilots' Sent: Wednesday, August 20, 2003 6:57 AM Subject: RE: KR>Isn't that PCB idea great? Robert, you will not believe, but it is a real country :-) Just that it is a ve-e-ery small. A exUSSR republic, have a look on the map, between Romanian and Ukraine. Do not ask where is Romania and Ukraine :-) BR, Alex Birca Moldova -----Original Message----- From: Robert Stone [mailto:rstone4@hot.rr.com] Sent: Wednesday, August 20, 2003 2:50 PM To: KR builders and pilots Subject: Re: KR>Isn't that PCB idea great? Where in the world is Moldova????? _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ Date: Wed, 20 Aug 2003 08:44:41 -0700 (PDT) From: Dennis Mingear To: KR builders and pilots Subject: Re: KR>Isn't that PCB idea great? Message-ID: <20030820154441.40730.qmail@web12605.mail.yahoo.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii MIME-Version: 1.0 Precedence: list Message: 14 Those are good points. I've spent a few years repairing circuit boards made of this material and my BIG concern is how brittle the material is. Compared to the AC plywood I've used in the past PCB material just doesn't have the "give" that plywood has. In addition it seems to be heavy by comparison, but I haven't actually weighed it to see. I also agree with an earlier post the material does seem to contain more epoxy than glass. I would worry about bonding as mentioned and the structural brittleness that I've noticed while working with the material. I would certainly build some test panels and stress them pretty hard before committing to using PCB material in my plane. If anyone tests this stuff please let us know what your results were. Dennis ... Mike Turner wrote: I would think the PBC would have the same strength or better than the plywood but I would want to know what kind of resin was used in the manafacture of the PBC. If it's made from a vinal ester product, then that's what I would use to glue it to the wood. If it's made from an epoxy resin I would use an epoxy resin glue. It's not a question of the type of glue used for the wood, it has to do with the bonding properties between the glue and the PBC. Mike Turner ----- Original Message ----- From: Alexander Birca (MD/RMD) To: 'Robert Stone' ; 'KR builders and pilots' Sent: Wednesday, August 20, 2003 6:57 AM Subject: RE: KR>Isn't that PCB idea great? Robert, you will not believe, but it is a real country :-) Just that it is a ve-e-ery small. A exUSSR republic, have a look on the map, between Romanian and Ukraine. Do not ask where is Romania and Ukraine :-) BR, Alex Birca Moldova -----Original Message----- From: Robert Stone [mailto:rstone4@hot.rr.com] Sent: Wednesday, August 20, 2003 2:50 PM To: KR builders and pilots Subject: Re: KR>Isn't that PCB idea great? Where in the world is Moldova????? _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html --------------------------------- Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design softwareFrom red-bridge@juno.com Wed Aug 20 09:56:52 2003 Received: from outbound29-sr.lax.untd.com ([64.136.29.170] helo=webmail05.lax.untd.com) by lizard.esosoft.net with smtp (Exim 3.36 #1)id 19pWGS-000OwF-00 for krnet@mylist.net; Wed, 20 Aug 2003 09:56:52 -0700 Received: from cookie.untd.com by cookie.untd.com for <"ls4hEsNnkEddqybMuKN9RprzSLK+79TX9lVqli1NYNuL0Q9eOsiLng==">; Wed, 20 Aug 2003 09:57:59 PDT Received: (from red-bridge@juno.com) by webmail05.lax.untd.com (jqueuemail) id H72TQGTM; Wed, 20 Aug 2003 09:57:59 PDT Received: from [168.215.192.38] by webmail05.lax.untd.com with HTTP: Wed, 20 Aug 2003 16:57:49 GMT X-Originating-IP: [168.215.192.38] Mime-Version: 1.0 X-Original-From: red-bridge@juno.com Date: Wed, 20 Aug 2003 16:57:49 GMT To: krnet@mylist.net X-Mailer: WebMail Version 2.0 Content-Type: text/plain From: red-bridge@juno.com Message-Id: <20030820.095759.14426.4914@webmail05.lax.untd.com> Subject: KR>new KR builder - spar question X-BeenThere: krnet@mylist.net X-Mailman-Version: 2.1b3 Precedence: list Reply-To: KR builders and pilots List-Id: KR builders and pilots List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: List-Help: Hello, Ok, so I've wanted to build a KR-1 since October, 1974 (yes, I still have the magazine) and I just now got around to ordering the plans. They have arrived and I am carefully reading the assembly instructions, trying to visualize this project. Step 4.2.10 includes this note: "the front spars have web full length only on the aft face. The aft spars have web full length only on the forward face." Huh? The accompanying drawings make no indication of this, and, if indeed this is the case, where does the web stop? Do other builders do this? Or, is this, like Monnett's "weight saving" spar holes in the Sonerii, advice best ignored? Should the web be full length of the spar on both faces? Thanks in advance. I'm sure I will have many more questions in the comming months and years. Keith C. Krumwiede Rosedale, IN ------------------------------ Date: Wed, 20 Aug 2003 13:57:04 -0500 From: "Mike Turner" To: "KR builders and pilots" Subject: Re: KR>new KR builder - spar question Message-ID: References: <20030820.095759.14426.4914@webmail05.lax.untd.com> Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: list Message: 15 keith what you read is correct. You get a full web on the rear face of = the forward spar and a full web on the forward face of the rear spar = (outer wings). You also get a web on the front face of the front spar = for the first 12" only. and you get a web on the back of the rear spar = for 12" only. You don't need that extra web it only adds weight Mike Turner ----- Original Message -----=20 From: red-bridge@juno.com=20 To: krnet@mylist.net=20 Sent: Wednesday, August 20, 2003 11:57 AM Subject: KR>new KR builder - spar question Hello, Ok, so I've wanted to build a KR-1 since October, 1974 (yes, I still = have the magazine) and I just now got around to ordering the plans. They = have arrived and I am carefully reading the assembly instructions, = trying to visualize this project.=20 Step 4.2.10 includes this note: "the front spars have web full length = only on the aft face. The aft spars have web full length only on the = forward face." Huh? The accompanying drawings make no indication of this, and, if = indeed this is the case, where does the web stop? Do other builders do = this? Or, is this, like Monnett's "weight saving" spar holes in the = Sonerii, advice best ignored? Should the web be full length of the spar = on both faces? Thanks in advance. I'm sure I will have many more questions in the = comming months and years. Keith C. Krumwiede Rosedale, IN _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 133, Issue 1 *************************************