KR> Re: wingspan / spar analysis (Matt Elder)
Excellent post with a lot of great info to consider. It seems modifications often add weight and risk. Thank you, Matt. In His service, Donald K. Lord Sent from my iPad
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 from the clamps?Ed
KR> WING SPAR WOOD BENDING
Some people make a way to heat the wood that they want to bend. The heat softens the sap/resin in the wood so there is probably not much if any spring back if the softened wood is placed into a jig and left for the sap/resin to reharden or normalize. I have seen photos of some vertical ovens that have been made. They were just simply a tall pipe or can sitting above a pot with steaming water where the rising steam heats the wood and softens the resin in it. Do some looking around on the Internet and I am sure you will find information on this. The ones I have seen were used to soften 1/4"x 1/2" spruce sticks for easy bending the top and bottom sticks for placement into wing rib jigs for the Wittman Tailwind wings. The Tailwind wing uses made up ribs that are placed onto the wing spars then the whole wing surface is covered with thin plywood and now days most builders put a thin layer of fiberglass cloth over that to seal the plywood. Larry H On Oct 16, 2011, at 8:22 AM, "Ed" wrote: > 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 from the > clamps?Ed > > > > ___ > 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> Steam Bending Wood
Here below is a link to steam bending wood. I typed into Google search "how to heat bend wood" Lots of links came up. http://www.primitiveways.com/bending.html Larry H
KR> Methods of Bending Wood
Here is one more link to wood bending http://www.allwoodwork.com/article/woodwork/methods_of_bending_wood.htm Larry H
KR> WING SPAR WOOD BENDING
Steam quickly heats and moistens the fibers in wood so it may be bent with out cracking. Heating the resin or sap has nothing to do with the process. Wood may also be bent by soaking in water for a few days... Native Americans built their canoes this way. Unfortunately, the excessive water sometimes weakens or damages the wood. Another popular method of wood bending is to cut the wood into thin strips and glue the layers together while been held in the desired shape by a clamping jig. I have always noticed a little spring back after making a piece so I over compensate the bend by building the clamping jig to make a slightly sharper bend than needed. Brant Hollensbe West Des Moines, Iowa Bhollensbe at mchsi
KR> Great Saturday, representing KR
I just wanted to report that I had a fantastic Saturday and I hope represented the KR aircraft and the KRnet to my best. Yesterday I participated in the AirFest airshow when it came to my airport, Georgetown Scott County airport in Georgetown Kentucky. A plug for my airport, it received the airport of the year award from the FAA. There were several war birds including a Folke Wolf and a Chinese fighter trainer and others. B 17 rides and fly by's, antiques, modern aircraft, parachute jumpers demonstrations and more. Several thousand people were on hand to watch a great show. What was so special to me was that I won two first place awards for Best Overall Experimental and Best instrument panel. I must admit, it was interesting, unexpected and surprising to see a crowd around my plane all day. Eventually, I was asked to park my plane in front of the main stage for the rest of the show and to come on stage to speak to the crowd about my plane and experimental airplanes. I was honored to win awards because there were so many beautiful planes. I was also honored to represent the KR group and speak about how this group is so helpful and instrumental in the success of the KR aircraft. It was a day filled with a lot of people asking questions and they all wanted to know all they could about my interesting little airplane. I must admit, it was interesting, unexpected and surprising to see a crowd around my plane all day. On top of the awards and speaking to the crowd and being interviewed by radio and TV and being able to answer questions from so many people, especially the younger folks just getting interested in aviation. At times I felt like a sales representative for KR aircraft. Funny. I am proud to be a part of this great group and I hope I represented you all very well. I want to continue to give credit to so many of those in this group who have done so much. I want to name names but I am afraid I would leave out some names that have given so much to this group. I will try to post up some pictures for you all to see. Jeff York Georgetown Scott County Airport Lexington, KY 2010 KR Nationals Peoples Choice and Best interior 2011 Airfest Best Experimental, Best Instrument panel
KR> Encapsulating
Hey gang, I'm working on a new wood project that won't take to the air but it should fly across the water.anyway, I need to encapsulate all the frames and such. What are the current thoughts on how to thin epoxy to get a good flow? Dana Overall Richmond, KY i39 RV-7 slider "Black Magic" Flying..well sorta, useta, kinda Barrett Precision O 360 A1A Hartzell C2YR-1BFP/F7497-2 http://rvflying.tripod.com/blackmagic.jpg http://www.youtube.com/watch?v=MMi05-WU2D0#GU5U2spHI_4 http://rvflying.tripod.com do not archive
KR> Encapsulating
What are the current thoughts on how to thin epoxy to get a good flow? > > Dana Overall > > Have you tried heat? I have used a hair drier many times to get epoxy to flow. You might try some samples to see if it does what you would like. John Backer
KR> Encapsulating
I've heard you can mix rubbing achohal with it and the achohal will evaporate out after you have spread it. You might test that on something first. Mike Turner Edgewood N.M. - Original Message - From: John Backer To: KRnet Sent: Sunday, October 16, 2011 8:05 PM Subject: Re: KR> Encapsulating What are the current thoughts on how to thin epoxy to get a good flow? > > Dana Overall > > Have you tried heat? I have used a hair drier many times to get epoxy to flow. You might try some samples to see if it does what you would like. John Backer ___ 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> Encapsulating
You might want to talk to some of the people in the home made trimaran community. They have had mixed results using total encapsulation. Garry cowles Connected by DROID on Verizon Wireless -Original message- From: Dana Overall To: kr...@mylist.net Sent: Sun, Oct 16, 2011 23:36:16 GMT+00:00 Subject: KR> Encapsulating Hey gang, I'm working on a new wood project that won't take to the air but it should fly across the water.anyway, I need to encapsulate all the frames and such. What are the current thoughts on how to thin epoxy to get a good flow? Dana Overall Richmond, KY i39 RV-7 slider "Black Magic" Flying..well sorta, useta, kinda Barrett Precision O 360 A1A Hartzell C2YR-1BFP/F7497-2 http://rvflying.tripod.com/blackmagic.jpg http://www.youtube.com/watch?v=MMi05-WU2D0#GU5U2spHI_4 http://rvflying.tripod.com do not archive ___ 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> torque wrenches
Believing a torque wrench can have some serious consequences . i just believed one and set head torque on an engine to find i had over torqued it . strippped one crankcase thread completly out in flight = 3 hrs and helicoil sorted that . loss of compression coming out of head seal in flight ... other studs also giving me grief ,,,in all about 8 hrs work but could also have brought me down = safety issues We tested a brand new one right out the box and that was miles out ... So check them all phill From: M&C To: KRnet Sent: Monday, October 17, 2011 5:20 AM Subject: Re: KR> Encapsulating I've heard you can mix rubbing achohal with it and the achohal will evaporate out after you have spread it. You might test that on something first. Mike Turner Edgewood N.M. - Original Message - From: John Backer To: KRnet Sent: Sunday, October 16, 2011 8:05 PM Subject: Re: KR> Encapsulating What are the current thoughts on how to thin epoxy to get a good flow? > > Dana Overall > > Have you tried heat? I have used a hair drier many times to get epoxy to flow. You might try some samples to see if it does what you would like. John Backer ___ 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 ___ 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
