KR> Spar dimensions

Thanks Mark. That question Was a little premature. I was thrown by the fact that they sent me material for the verticals that was too small (which I had to reorder) and the vagueness of the plans. Makes sense now. Had an issue with which way the laminate was supposed to go and the size stock

KR> Spar dimensions

Chad wrote: > Quick question. The dimensions for the main spar called out in the > plans. 2 5/32" top view. Is that to include the birch ply or is that > the cap only? Spar cap only. The "drawing number 12" covers spar and verticals, and underneath shows the additional web plywood added, with

KR> Spar dimensions

Quick question. The dimensions for the main spar called out in the plans. 2 5/32" top view. Is that to include the birch ply or is that the cap only? Thank you Chad Sent from my iPhone

KR> Spar varnish/wing skins

>At 03:40 PM 9/28/2015, you wrote: >What type of varnish are people using on the spars? + Minwax Helmsman Spar Varnish. I bought mine at a boat supply company way back in the late 90's. I have seen it at Menard's and Home Depot. Mark

KR> Spar varnish/wing skins

At 03:40 PM 9/28/2015, you wrote: >What type of varnish are people using on the spars? + Any good quality varnish should work. Be extra cautious not to varnish where you will have epoxy contacting the wood as in spar caps. Larry Flesner

KR> Spar varnish/wing skins

What type of varnish are people using on the spars? I have a set of Diehl wing skins -should they be stored horizontally or vertically. Thanks Garry Cowles Orlando FL Sent from my iPad

KR> spar attachments

At 05:25 PM 6/12/2015, you wrote: >I thought that also...what could it hurt? But several times I've >wished I hadn't done that, so I could remove the WAF for some reason >or another...

KR> spar attachments

Larry Flesner wrote: > It wouldn't hurt to epoxy the fitting to wood contact surfaces also as they are installed.< I thought that also...what could it hurt? But several times I've wished I hadn't done that, so I could remove the WAF for some reason or another...mounting the wing tanks was

KR> spar attachments

At 11:31 AM 6/12/2015, you wrote: >A couple of other builders were looking >at what I was doing and both recommended that I use a marine varnish on the >bolts before I put them through the spars +++ I'm with Mark on this one. Use epoxy.

KR> spar attachments

Ray Fuenzalida wrote: A couple of other builders were looking > at what I was doing and both recommended that I use a marine varnish on the > bolts before I put them through the spars. If not, they said that the AN > bolts would delaminate and rot the wood spars from the inside. I think the

KR> spar attachments

hello all, Just a quick question. I am redoing the waf's on the wings I have (got beautiful ones from Dan - thanks Dan) and I have a question about the fittings and bolts. I am going to go ahead and do it because it makes sense but I hadn't heard anyone mention it before. Of course I am priming

KR> Spar and WAF stress analysis

the conclusion of the German Test of the Kr Spar and WAF's calculated by Otto Bartsch is: Any reliable built Kr with a MTOW of 1050 pounds is a 4,2 G's plane with a 1,45 safety factor,or a 3,8 G 's x 1,6 plane! Otto Bartsch assured me,that the calculation was carried out somewhat

KR> Spar and WAF stress analysis

That's nice to know... Thanks! On Feb 24, 2015 12:39 PM, "Herbert F?rle" wrote: > > the conclusion of the German Test of the Kr Spar and WAF's calculated by Otto Bartsch is: Any reliable built Kr with a MTOW of 1050 pounds is a 4,2 G's plane with a 1,45 safety factor,or a

KR> spar extensions on KR2s wings

Wing skins, Virg On 10/7/2013 4:51 PM, cruzj12 at frontiernet.net wrote: > Has everyone building the 2s wings built the 12"extensions to plans or is > there another method to get equal or better results? Thanks,... > Joe Cruz > Spencer,NY > KR2S > N6102L >

KR> spar extensions on KR2s wings

Has everyone building the 2s wings built the 12"extensions to plans or is there another method to get??equal or better results? Thanks,... Joe Cruz ??? Spencer,NY KR2S N6102L

KR> spar analysis (Matt Elder)

Hi Matt I would really like to hear any advise you might have for someone considering a "bent" center spar . I was going to purchase new spruce stock possibly 1/4" thick to laminate them. Also any ideas for dealing with the "spring back" effect that happens when a bent lamination is removed

KR> Spar

Larry Instead of doing a 3 piece setup like is in the plans, my spar will be bent up at the fuselage like Darren Cromptons kr. The only difference will be, I am gonna do away with the WAFS so everything will be 1 piece. This should create a little more room for fuel in the wings and allow

KR> Spar vs. Capstrip spruce stock

Thanks for the advice Jeff, Roger, Oscar, and Joe. As you may have figured out, wood is not my most knowledgeable subject. I read "sparcap" in the instructions and assume they would be made from capstrip. Very bad assumption. You guys saved me a bunch of money and time and possibly prevented me

Fw: KR> Spar vs. Capstrip spruce stock

erson" <kenhender...@q.com> To: <kr...@mylist.net> Subject: KR> Spar vs. Capstrip spruce stock List-Post: krnet@list.krnet.org Date: Tue, 30 Mar 2010 13:26:44 -0600 All, Still trying to get my Aircraft Spruce wood order right and I have a few questions. Is capstrip

KR> Spar vs. Capstrip spruce stock

Ken; capstrip stock is planks that have defects here and there but since it's intended to be ripped into capstrips for ribs or framing, the defects can be cut out and worked around. The wood itself is structurally sound, it's just that the plank is interrupted by defects. For spar stock the

KR> Spar vs. Capstrip spruce stock

All, Should have asked this as well. If capstrip is unsuitable for the wing spars is it also unsuitable for the spars used in the horizontal and vertical stabilizers? If so, not a problem as I will calculate width needed including kerf loss, order 5/8" spar stock, and rip them myself.

KR> Spar vs. Capstrip spruce stock

All, Still trying to get my Aircraft Spruce wood order right and I have a few questions. Is capstrip suitable for use as spar and longeron material? In their online catalog Aircraft Spruce states that their capstrip stock is "non-structural". Aren't spars considered structural? The

KR> Spar bolts at WAFs

Larry H said: 4 bolts each spar on one side or 8 little bolts per side or 16 total on both sides. Some may have used 4 per side but if so use a compression spacer between fittings. Probably safest to go the 16 piece route. I bought my KR2 plans built after all was built and just needed mods to

KR> Spar bolts at WAFs

Australian Standards will not allow the 4 separate bolts per spar. They insist on Two bolts with spacer. I used thick wall 4130 spacer and lock nuts. Phil Matheson VH-PKR Australia KR Web Page www.philskr2.50megs.com http://www.vw-engines.com/

KR> Spar stock

Hi and Happy early New Year, This question is for those of you who purchased your wood from Wicks. I am getting ready to build my inboard spars and the lumber wicks sent me is a little over sized. Am I supposed to trim it to the final dimensions after it is glued up, or did Wicks make a

KR> spar fitting

I have sat the centre spars in the fuse for the first time, and they fit very well, excepting the rear spar, the inner edges of the vertical members fore and aft of this spare are closer than the outer edges, there is a lot of bending in the side frame here, I would think the only way to

KR> spar sealing

By all means get the end grain coated to prevent checking in the grain. The top and bottom of the spruce is where you want glass to bond to. The plywood should be OK to coat as foam is the only thing that gets bonded to it. I had done all the inside of mine before the last layer of plywood webs

KR> Spar wood

Hey guys, Since I dont have a set of plans, can anybody tell me what wood I would need to order to build a set of KR2S spars - The center ones, front and rear. The only difference is that they will be 10 feet long - the outboard spars will be standard length. I plan to build the 18%

KR> spar wood

Hey guys,  Since I dont have a set of plans, can anybody tell me what  wood I would need to order to build a set of KR2S spars - The center ones, front  and rear.   The only difference is that they will be 10 feet long  -  the outboard spars will be standard length.  I plan to build the  18%

KR> spar wood

Australia. - Original Message - From: <bdazzca...@aol.com> To: <kr...@mylist.net> Sent: Monday, May 08, 2006 2:14 PM Subject: KR> spar wood Hey guys, Since I dont have a set of plans, can anybody tell me what wood I would need to order to build a set of KR2S spars -

KR> Spar wood

At 11:15 PM 5/7/2006, you wrote: >Hey guys, Since I dont have a set of plans, can anybody tell me what wood I >would need to order to build a set of KR2S spars - The center ones, front >and rear. The only difference is that they will be 10 feet long - the >outboard spars will be standard

KR> Spar wood

What is s the 18% Airfoil? Don ifly...@aol.com wrote: > Hey guys, Since I dont have a set of plans, can anybody tell me what wood I > would need to order to build a set of KR2S spars - The center ones, front > and

KR> Spar wood

Of D F Lively Sent: Monday, May 08, 2006 8:09 AM To: KRnet Subject: Re: KR> Spar wood What is s the 18% Airfoil? Don ifly...@aol.com wrote: > Hey guys, Since I dont have a set of plans, can anybody tell me what

KR> Spar wood

>What is so the 18% Airfoil? Don That is one version of the new low-drag wing, see http://www.krnet.org/as504x/ There are two versions, one is commonly called the 16% airfoil and is for people who already have their spars built; and the other (the 18%) is for new construction. It's advantage

KR> spar wood

> North Richmond > > > Australia. > - Original Message - > From: <bdazzca...@aol.com> > To: <kr...@mylist.net> > Sent: Monday, May 08, 2006

KR> Spar wood

Get the plans Order from AS or Wicks. they know. Also, RR says DO NOT LENGTHEN THE CENTER SPARS, Virg On Sun, 7 May 2006 23:15:06 EDT ifly...@aol.com writes: > Hey guys, Since I dont have a set of plans, can anybody tell me what > wood I > would need to order to build a set of

KR> Spar wood

I am not sure, from reading all of the posts in this thread, if a constant 18% thick wing is what is being discussed here or an 18% tapering to 15%. The 18% AS5048 was originally designed to be used as the root airfoil of a wing that tapered to the 15% AS5045 airfoil at the tip. According to

KR> Spar wood

>I don't remember any discussions about >using the 18% in any configuration other than as a root airfoil tapering >to a 15% at the tip. Steve: Please correct me if I'm wrong but it is my understanding that the center section stub wings are a constant cord of 18% thickness and the outer wing

KR> Spar build

Thanks for the info on spar wood guys. For those interested, I do need a center spar length that is 2 feet longer than normal. The 18% chord AS airfoil will improve the strength and load bearing necessary for my project. The Taller spar is about 20% stronger than the stock spar which

KR> Spar build

Bill: That makes sense as the momentof inertia goes up to the 3rd power of the depth of section (b x h cubed)/12. 8 cubed is 512 vs 7 cubed which which is only 343 so the spar is much stronger so in can probably handle the added bending moment. I know the basics but it would take a good aero

KR> Spar build

It might be time to elaborate on what Steve Eberhart eluded to earlier. After either tunnel tests or analysis (I forget which), Ashok decided there was something he didn't like about the characteristics of the AS5048 near stall...some sort of burble or separation, or something, which is when he

KR> Spar build

Bill: The Formula I used was for a solid beam not a KR2 Spar because the Spar is a "Composite build of (2) solid beams(plywood skins) and the spar caps separated by a distance and the "Crippling" can be ignored. Primarily the added strength comes from the added depth section which is taken to

KR> Spar length/spins

more spin resistent will make recovery more difficult. Mike Turner Jackson, Missouri Swing the prop and light the fire, dance amoung the stars.N642MC - Original Message - From: <jscott.pi...@juno.com> To: <kr...@mylist.net> Sent: Friday, January 27, 2006 7:31 PM

KR> Spar length/spins

006 9:11:49 PM > Subject: Re: KR> Spar length/spins > > I put my tanks in the outer wings amoung other reasons to make it somewhat > more spin resistant. I would agree that it would be somewhat more difficult > to recover "but not much" depending on how much rotatio

KR> Spar length

Obviously I'm missing something here John. Kindly explain the difference between a properly baffled fuel tank in the stub wings versus the same = tank in the outer wing panels. It would seem to me that if wing drop is your concern that the same weight further out would have more of a = detrimental

KR> Spar length

in the outer tanks. Anyone tried it. :-) Feelin embarassed here John. - Original Message - From: "Doug Rupert" <drup...@sympatico.ca> To: "'KRnet'" <kr...@mylist.net> Sent: Friday, January 27, 2006 4:26 PM Subject: RE: KR> Spar length Obviously I'm missing

KR> Spar length/spins

> >Nontheless, I would be interested to know how a KR behaves in a spin >with fuel only in the outer tanks. Anyone tried it. :-) > > John. ++ My KR has outer wing panel tanks only. It's stall is very gentle and straight

KR> Spar length

No need for embarrassment. I thought that was the idea behind this list to exchange ideas among builders and hash things out BEFORE construction and possible costly errors. Doug Nontheless, I would be interested to know how a KR behaves in a spin with fuel only in the outer tanks. Anyone tried

KR> Spar length/spins

On Fri, 27 Jan 2006 06:45:58 -0600 Larry Flesner writes: > > > > >Nontheless, I would be interested to know how a KR behaves in a > spin > > >with fuel only in the outer tanks. Anyone tried it. :-) > > > > John. >

KR> Spar length

Hi Netters, I was wondering if anyone has extended the length of their inner spars to get over fuel without adding a header tank? If so how much was added to total length? I would like to add a total of 12".. Is this possible? I would also be leaving the outer spars their length.

KR> Spar length

luck, Stephen ste...@compositecooling.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of bdazzca...@aol.com Sent: Wednesday, January 25, 2006 2:42 AM To: kr...@mylist.net Subject: KR> Spar length Hi Netters, I was wondering if an

KR> Spar length

PLEASE DON'T. Unless YOU are prepared to do the Engineering math to prove that they will handle the loads. This is the one thing RR does not want to be done, Virg On Wed, 25 Jan 2006 03:42:11 EST bdazzca...@aol.com writes: > Hi Netters, > >I was wondering if anyone has extended

KR> Spar length

Sent: Thursday, January 26, 2006 1:29 AM Subject: RE: KR> Spar length >I increased my stub wing 11 inches on each side. My main reasons for > doing this were to increase my flap area and effectiveness and to > increase wing area due to the weight of my engine. I increased the >

KR> Spar

Thinking of laminating my center spar caps and building in the dihedral. Do I do this at the center of the spar or where the spar exits the fuselage? Patrick Driscoll Saint Paul, MN patric...@usfamily.net --- http://USFamily.Net/dialup.html - $8.25/mo! -- http://www.usfamily.net/dsl.html -

KR> Spar

Pat Driscoll wrote: > Thinking of laminating my center spar caps and building in the dihedral. > Do I do this at the center of the spar or where the spar exits the > fuselage?< If I were doing it I'd do it just outboard of the fuselage or at the fuselage sides. A V in the middle would make

KR> Spar

The plans built are adequate, How mch time do you want to spend building ?? Virg On Mon, 1 Aug 2005 14:26:04 -0500 writes: > Thinking of laminating my center spar caps and building in the > dihedral. Do I do this at the center of the spar or where the spar >

KR> Spar questions

36 To: gle...@rtconnect.net Subject: Re: KR> Spar questions B. Ferguson wrote: > Hello, > > With this discussion on spar strength I was curious to know if any of > the techniques discussed, along with the extra thickness of the 5048 > airfoil, would add enough strength to

KR> Spar questions

Nice work Oscar. One thing most people miss in the analysis, however, is the variability of the materials. Wood can be 50 percent (or more) stronger than the published low limit. So, we need to test the actual parts to be used, or allow a reasonable safety factor for the material variability.

KR> Spar questions

`Standard K R 2 Spar WILL NOT take longer outboard wings and still meet specs, Virg On Tue, 08 Feb 2005 19:10:28 -0600 "B. Ferguson" writes: > Hello, > > With this discussion on spar strength I was curious to know if any > of > the techniques discussed, along

KR> Spar questions

>But again, RR is emphatic about using the -1B wings on the -2 or -2S. This much I am aware of from the 1B posts Mark L. stirred up a few days before Christmas. Read as much as possible on the 1B in the archives. The question would be was this analysis for the original spars in the old airfoil?

KR> Spar questions

B. Ferguson wrote: > This much I am aware of from the 1B posts Mark L. stirred up a few days > before Christmas. Read as much as possible on the 1B in the archives. > The question would be was this analysis for the original spars in the > old airfoil? It would certainly be for the original spars

KR> Spar questions

Hello, With this discussion on spar strength I was curious to know if any of the techniques discussed, along with the extra thickness of the 5048 airfoil, would add enough strength to the center section to allow for fitting of the 1-B wings? Adding a large amount to the span would no doubtedly

KR> Spar questions

B. Ferguson wrote: > Hello, > > With this discussion on spar strength I was curious to know if any of > the techniques discussed, along with the extra thickness of the 5048 > airfoil, would add enough strength to the center section to allow for > fitting of the 1-B wings? Adding a large amount to

KR> Spar questions

Steve wrote- >I would destruction test a pair of spars if I had the capability. I don't >have any way of putting 4500 pounds of pressure on anything, much less >getting the load distributed right. Why test a pair of spars? One will do. And as far as a test setup and apparatus, check out

KR> Spar questions

Oscar Zuniga wrote: > > Why test a pair of spars? One will do. One stock, one laminated. Gotta have a control :) > And as far as a test setup > and apparatus, check out > http://www.flysquirrel.net/wing/spartest.html and see if you can > duplicate the high-tech test setup detailed there... PS;

KR> Spar questions

You can also test a scale model of a spar and obtain good results. Stan Hall discussed the methodology for this in an early Sport Aviation article, two actually. Denny ... Oscar Zuniga wrote: Steve wrote- >I would destruction test a pair of spars if I had the

KR> Spar dimensions

Does anyone have the dimensions of the spar caps (width and depth) and the length and thickness of the blocks between them handy? I'm bored and feel like figuring out how strong the things are. -- Steve N205FT mystic...@swbell.net He who seeks will find, and he who knocks will be let in.

KR> Spar dimensions

Check your plans, Virg Virgil N. Salisbury - AMSOIL www.lubedealer.com/salisbury Miami ,Fl

KR> Spar dimensions

VIRGIL N SALISBURY wrote: >Check your plans, Virg I would if they were here yet... -- Steve N205FT mystic...@swbell.net He who seeks will find, and he who knocks will be let in.

KR> Spar dimensions

And he who waits will get the plans, Virg ( or should this have been sent direct??) On Fri, 4 Feb 2005 14:41:36 -0600 "Bubba" writes: > VIRGIL N SALISBURY wrote: > >Check your plans, Virg > > I would if they were here yet... > -- > Steve > N205FT >

KR> Spar dimensions

VIRGIL N SALISBURY wrote: >And he who waits will get the plans, Virg ( or should this have > been > sent direct??) And he who plans ahead and verifies the spar design in the plane is suitable for his uses will survive to fly again. -- Steve N205FT mystic...@swbell.net He who seeks will

KR> spar carbon fiber

I would still make up 2 samples and test each with and without the carbon fiber to test their different load carrying abilities. I think you may find it interesting. The "cuff" of carbon fiber will move the immediate loading of the spar out board to the bare spar, while the carbon fiber will

KR> spar carbon fiber

Enough about spars already!!! this has been flogged a thousand times. There must be a structural engineer out there somewhere who would be only too happy to answer any questions about this issue. So maybe we can put it to rest, and only focus on the facts of this issue as documented by someone who

KR> spar carbon fiber

At 05:42 PM 12/3/2004, you wrote: >Enough about spars already!!! this has been flogged a thousand times. >There must be a structural engineer out there somewhere who would be only >too happy to answer any questions about this issue. I am a licensed professional engineer and I gave my short answer

KR> spar carbon fiber

Thanks Don. Gav - Original Message - From: "Donald Reid" <donr...@peoplepc.com> To: "KRnet" <kr...@mylist.net> Sent: Friday, December 03, 2004 8:51 PM Subject: Re: KR> spar carbon fiber > At 05:42 PM 12/3/2004, you wrote: > >Enough

KR> spar carbon fiber

- Original Message - From: "GavinandLouise" <gdono...@bigpond.net.au> Subject: Re: KR> spar carbon fiber > > So maybe we can put it to rest, and only focus on the facts of this issue as > documented by someone who really knows. > Gav I am quite

KR> Re: KR spar

Jim I think you missed Marks point. It is not that he too lazy to design a new spar for some other guy. Heck just look at his web site to see what he has done for us. Instead he is busy with his own project and his spars are done. If you or anyone else wants to undertake a redesign of the

KR> Re: KR spar

I was not referring to the spars, I think he has done real well on that, I was thinking of the foam and glass on the fuselage replaceing the plywood it would be a simple test if someone has all the materials. Jim On Sun, 24 Oct 2004 12:44:01 -0500 "Brant Hollensbe" writes:

KR> spar material

Hello netters, I became a Grandfather Saturday. Boy is he good looking. I have been hanging back until I updated my anti virus program. Its done. As far as KR. I used the material list as specified in the plans and Wicks list. Tried to purchase only the wood for the spars. Wrong. I now

KR> Spar taper jig

I have a spar taper jig I used to taper the 89.5 inch spars in the plan view. I can't seem to trash it. If someone wants it you can have it. (although you can make one in about one hour.) I might even bring it to the gathering and put it in the give-a-way pile. (Do we have one of those?) How

KR> Spar taper jig

At 12:31 PM 8/23/04 +, you wrote: >I have a spar taper jig I used to taper the 89.5 inch spars in the plan view. I can't seem to trash it. If someone wants it you can have it. (although you can make one in about one hour.) I might even bring it to the gathering and put it in the give-a-way

KR> spar skins/ Australia

Gavin I just got the price below from Marine Timbers in Melbourne. The $445 was for most of the Spruce need to build a KR Fuse. and the hoop pine ply per sheet. --- Phillip price for hoop pine as per list - $445.00 3/32 (2mm) ply $66.55 1/8 (3mm) ply $66.55. all prices include GST ex

KR> spar skins

Can someone tell me what is the correct skin to use for the spars. I need to place my order this week. The plans call for 3/32 mahog. with birch or popular core. I noticed Mark used birch plywood. According to Wicks prices it would be cheaper and I am about cheaper. Finally (I think this was

KR> spar skins

Subject: KR> spar skins Can someone tell me what is the correct skin to use for the spars. I need to place my order this week. The plans call for 3/32 mahog. with birch or popular core. I noticed Mark used birch plywood. According to Wicks prices it would be cheaper and I am about cheaper. Finally

KR> spar skins

Thanks Brian, I think I will be ordering 2 4x8 sheets of Birch.(for spars only). If anyone needs to stop me let me know. Steven Phillabaum Auburn Alabama> > Use M90. > > I used Mahogany but it did cost a lot. My last two KRs had a lighter > colored wood that I assumed was birch but I was

KR> spar skins

Steven Phillabaum wrote: > I think I will be ordering 2 4x8 sheets of Birch.(for spars only). If anyone needs to stop me let me know. You're right about the cedar. That's the one place on the plane that birch is required, rather than mahogony. Mark Langford, Huntsville, Alabama N56ML "at"

KR> spar skins

lf Of Mark Langford Sent: Wednesday, June 30, 2004 10:35 PM To: KRnet Subject: Re: RE: KR> spar skins Steven Phillabaum wrote: > I think I will be ordering 2 4x8 sheets of Birch.(for spars only). If anyone needs to stop me let me know. You're right about the cedar. That's the one place on the

KR> spar skins

Sorry about the cedar comment. I had a picture of mahogony in what little brain I have left, and it came out as cedar instead. They kind of look alike, from about a hundred yards or so. I don't have a manual in front of me right now, but I believe the manual says that either mahogany or birch

KR> spar skins

"Somebody else is welcome to check for us..." Ok I'm reading it right now, so I'll have a look p.19. "3/32 plywood 3 ply mahogany, birch or poplar center." Cheers. Peter Bancks stranged...@dodo.com.au http://www.homebuiltairplanes.com http://canardaviationforum.dmt.net

KR> spar skins

For what it's worth, from the KRnet search engine at http://www.maddyhome.com/krsrch/index.jsp , using "birch plywood spar" got a bunch of hits, the one below included. Maybe it's where I got the idea, but I don't think anybody will argue that birch is not the stronger of the two, and hence a

KR> spar skins

And having said that, here's one from Don Reid where he advocates running the grain horizontal, rather than vertical. I'd trust just about anything Don says as gospel. -- List-Post: krnet@list.krnet.org Date: Jul 20, 1999 8:27 AM From: Donald Reid

KR> spar skins

. www.engalt.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of StRaNgEdAyS Sent: Thursday, July 01, 2004 7:44 AM To: kr...@mylist.net Subject: Re: RE: KR> spar skins "Somebody else is welcome to check for us..." Ok I'm reading it right now,

KR> spar skins

[mailto:krnet-boun...@mylist.net]On Behalf Of Mark Langford Sent: Thursday, July 01, 2004 8:06 AM To: KRnet Subject: Re: RE: KR> spar skins And having said that, here's one from Don Reid where he advocates running the grain horizontal, rather than vertical. I'd trust just about anything Don s

KR> spar skins

> thickness # plysparallel perpendicular > 0.125" 3 15.17 5.544 ... but after looking at these numbers, I think I just started an argument with myself. I had to wonder what's wrong with vertical, since that would be "parallel to the grain", and by far the strongest.

KR> spar skins

No one has mentioned the 5/8" vertical spruce blocks that the plans call for when building KR spars. The spars are a variant of an I-beam. The function of the web in any I beam or box beam is to keep the two caps from coming together. No matter what loading is put on the beam - plus or minus

KR> spar skins

At 08:52 AM 7/1/2004, you wrote: > > thickness # plysparallel perpendicular > > 0.125" 3 15.17 5.544 > >... but after looking at these numbers, I think I just started an argument >with myself. I had to wonder what's wrong with vertical, since that would >be "parallel

KR> spar skins

I thought you were an electrical engineer :) On Thu, 1 Jul 2004 09:21:24 -0400 "Wood, Sidney M." wrote: >No one has mentioned the 5/8" vertical spruce blocks that >the plans call for when building KR spars. The spars are >a variant of an I-beam. The function of the web

KR> spar skins

: Thursday, July 01, 2004 9:21 AM To: KRnet Subject: RE: KR> spar skins Plywood has an odd number of plies with outside plies in the same grain orientation. That is the strongest dimension orientation. Sid Wood, Tri-gear KR-2 N6242 Mechanicsville, MD USA sidney.w...@titan.

KR>Spar lamination direction - Oops

My main reason for stating that you should not drill through the glue joint was because it is very hard to keep a drill bit going straight + Good point - could ruin an expensive spar if the drill bit goes walkies. >>>. If I build

KR>Spar lamination direction - Oops

At 09:58 AM 6/10/2004, you wrote: >Thanks - that gives me more confidence. Still bothers me that Don Reid >did not like the idea - I was expecting a boffin (like him) to step up >and declare this to be as good as (or better). > >My instinct is to stagger the WAF bolt holes so as to void having

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