Hi Frank Thanks for your mail.AND REFERANCES.Re Dynal i have it on the hull of my wooden yacht. Apparently its main purpose was to stop the resin running down the hull when applied.So no weight factor problem here. iT MUST HAVE PLENTY OF RESIN AS AFTER I REPAINTED THE HULL EVERY BODY MISTOOK IT FOR FIBRE GLASS ! When the Dynal factor was introduced to me re KR use in the early days of production this sort of answered my question.(MANY MANY EMAILS AGO) WHICH WAS CAN I USE A LIGHTER GRADE OF CARBON THAN THE 6 0Z (APPROX) EGLASS MOST BUILDERS ARE USING NOW. I SUMMISED FROM THE USING OF DYNAL IN THR EARLY DAYS OF KR THAT THE STRUCTUAL INTEGERATY OF THE KR WING DOES NOT RELY ON THE SKIN. (THERE IS ANOTHER POINT OF DEBATE HERE )IF MY CONCLUSION IS CORRECT I CAN THEN USE THE LIGHTEST GRADE OF CARBON OR GLASS THAT IS PRACTICAL. WITH WEIGHT SUCH A CRITICAL ISSUE AND APPARENTLY NO STRUCTUAL COMPRIMISE. I THEN RAISE THE QUESTION WHY ARE BUILDERS USING THE HEAVEIER CLOTH.
REGARDING ONE PIECE WING. I HAVE A MATE IN OZ WHO HAS A CNC MACHINE SHOP. AND HE IS AN AIRPLANE PERSON. HE IS EXPERIANCED WITH WING DESIGHN AN CONSTRUCTION RE THIS METHOD. WE HAVE DISCUSSED DOING THE FOAM PLUG BIT AT LENGH FOR OTHER PROJECTS I AM SURE IT IS THE WAY TO GO. ALL THE BEST TIM, AUSTRALIA t...@dodo.com.au ----- Original Message ----- From: "Frank Ross" <alamo...@yahoo.com> To: "KRnet" <kr...@mylist.net> Sent: Friday, February 17, 2006 3:28 AM Subject: Re: KR> Carbon Fibre and Dynel > Tim, > Click on the following to go to Don Reid's links to early articles on the > KR: > http://aerofoilengineering.com/KR/sportaviation/kr_SA.htm > The article at: > http://aerofoilengineering.com/KR/sportaviation/Kr73-1.HTM > explains the use of Dynel and should answer your question about what is > used "under" the dynel/fiberglass. > Be careful talking on KRnet about Dynel. You could start a thread that > could last for months and have people in a very excited state. > Don't ask how I know... > To address your question - what I learned is that Dynel is no longer used > because it holds more epoxy and the end product ends up being heavier than > the same part made from fiberglass. Strength of the Dynel is not a factor > in the KR as some early KRs were made with Dynel and came out fine. Kayak > builders gave up on Dynel for pretty much the same reasons. > I don't think you'll have those problems with Carbon Fiber. > Frank Ross > > > Tim Haynes <t...@dodo.com.au> wrote: > Hi Doug >> >> > A question re KR2 original > plans. Is it correct the original plans of the KR2 show dynal sheathing as > the nominated wing skin..... Dynal offers no structual bennefits only > acting as a skin to paint.It also weighs almost nothing. Out of interest > if dynal was / is used it would not be premoulded. What technique was > used, was there a layer of thin foam underneath the Dynal. ??? > Regards, > Tim, Australia > t...@dodo.com.au > > > Frank Ross, > EAA Chapter 35, > San Geronimo, TX > RAF Lakenheath, Suffolk, England, UK > Visit my photo album at: > http://photos.yahoo.com/alamokr2 > > --------------------------------- > Yahoo! Mail > Use Photomail to share photos without annoying attachments. > _______________________________________ > 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
