KR> Carbon fibre cloth
Does anyone know which weight and weave carbon fibre cloth is considered best for the KR airfoil surfaces? Cheers -- Darren Crompton AUSTRALIA My web site: www.kr-2s.com
KR> Carbon fibre cloth
Hi Darren - Let us know how it works - I am interested in doing the same to save a little weight and increase strength. -dave Darren Crompton wrote: >Does anyone know which weight and weave carbon fibre cloth is considered >best for the KR airfoil surfaces? > >Cheers > >
KR> Carbon fibre cloth
At 07:42 AM 5/31/2007, you wrote: >Hi Darren - Let us know how it works - I am interested in doing the same >to save a little weight and increase strength. > >-dave ++= The KR has proven over time to be quite strong enough using the standard KR cloth. With only one layer of glass from the forward spar to the trail edge, and assuming probably the same amount of resin, I don't see where the extra cost of carbon fiber could be justified financially for the weight savings of the cloth alone which, in all probability, will be about the same. The weight savings generally comes in using less layers of cloth, which in this case. you can't do. The weakest part of the wing is at the attach fittings. Using carbon fiber won't change that. The chain is only as strong as it's weakest link and you're not improving the weak link. Carbon fiber is probably 4 times more expensive. The difference would probably buy a nice hand held radio. :-) Just a thought from the far side... Larry Flesner
KR> Carbon fibre cloth
Larry is absolutely correct, except that I think it is now 5 times more expensive, for no gain. From: Larry&Sallie Flesner List-Post: krnet@list.krnet.org Date: 2007/05/31 Thu PM 12:27:38 CDT To: KRnet Subject: Re: KR> Carbon fibre cloth At 07:42 AM 5/31/2007, you wrote: >Hi Darren - Let us know how it works - I am interested in doing the same >to save a little weight and increase strength. > >-dave ++= The KR has proven over time to be quite strong enough using the standard KR cloth. With only one layer of glass from the forward spar to the trail edge, and assuming probably the same amount of resin, I don't see where the extra cost of carbon fiber could be justified financially for the weight savings of the cloth alone which, in all probability, will be about the same. The weight savings generally comes in using less layers of cloth, which in this case. you can't do. The weakest part of the wing is at the attach fittings. Using carbon fiber won't change that. The chain is only as strong as it's weakest link and you're not improving the weak link. Carbon fiber is probably 4 times more expensive. The difference would probably buy a nice hand held radio. :-) Just a thought from the far side... Larry Flesner ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net Post photos, introductions, and For Sale items to http://www.kr2forum.com/phpBB2/index.php please see other KRnet info at http://www.krnet.org/info.html
KR> Carbon fibre cloth
yep: All that stuff comes from oil! Don - Original Message - From: To: "KRnet" Sent: Thursday, May 31, 2007 1:28 PM Subject: Re: Re: KR> Carbon fibre cloth > Larry is absolutely correct, except that I think it is now 5 times more > expensive, for no gain. > > From: Larry&Sallie Flesner > Date: 2007/05/31 Thu PM 12:27:38 CDT > To: KRnet > Subject: Re: KR> Carbon fibre cloth > > At 07:42 AM 5/31/2007, you wrote: >>Hi Darren - Let us know how it works - I am interested in doing the same >>to save a little weight and increase strength. >> >>-dave > ++= > > The KR has proven over time to be quite strong enough using > the standard KR cloth. With only one layer of glass from the > forward spar to the trail edge, and assuming probably the same > amount of resin, I don't see where the extra cost of carbon fiber > could be justified financially for the weight savings of the cloth > alone which, in all probability, will be about the same. The weight > savings generally comes in using less layers of cloth, which in > this case. you can't do. > > The weakest part of the wing is at the attach fittings. Using carbon > fiber won't change that. The chain is only as strong as it's weakest > link and you're not improving the weak link. Carbon fiber is probably > 4 times more expensive. The difference would probably buy a nice > hand held radio. :-) > > Just a thought from the far side... > > Larry Flesner > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > Post photos, introductions, and For Sale items to > http://www.kr2forum.com/phpBB2/index.php > please see other KRnet info at http://www.krnet.org/info.html > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > Post photos, introductions, and For Sale items to > http://www.kr2forum.com/phpBB2/index.php > please see other KRnet info at http://www.krnet.org/info.html >
KR> Carbon fibre cloth
It has been 15 yrs or better but at 1 of the gatherings Jeanett told a group of use that she had an enginer do a load test of the wing and the carry thru spare gave out before the attach fittings. She was woried about folks adding wing extensions. It was around 92 or 93 Maybe even earler. Larry&Sallie Flesner wrote: At 07:42 AM 5/31/2007, you wrote: >Hi Darren - Let us know how it works - I am interested in doing the same >to save a little weight and increase strength. > >-dave ++= The KR has proven over time to be quite strong enough using the standard KR cloth. With only one layer of glass from the forward spar to the trail edge, and assuming probably the same amount of resin, I don't see where the extra cost of carbon fiber could be justified financially for the weight savings of the cloth alone which, in all probability, will be about the same. The weight savings generally comes in using less layers of cloth, which in this case. you can't do. The weakest part of the wing is at the attach fittings. Using carbon fiber won't change that. The chain is only as strong as it's weakest link and you're not improving the weak link. Carbon fiber is probably 4 times more expensive. The difference would probably buy a nice hand held radio. :-) Just a thought from the far side... Larry Flesner ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net Post photos, introductions, and For Sale items to http://www.kr2forum.com/phpBB2/index.php please see other KRnet info at http://www.krnet.org/info.html - Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on, when.
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