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<DIV>Thanks guys !!</DIV>
<DIV> </DIV>
<DIV>My basement is really humid in summer (I live in Michigan). I do have a dehumidifier and it was set up to 50% most of the time except in winter. I started using it after experiencing wood warp and buckle during the last project. the balsa stick bend to different side before and after using the dehumidifier. As you said, the wood has less problem after put them together. I am thinking leave the wood in the basement with the dehumidifier turned on for a awhile and start building later. My next and 1st 2m size plane project might take me up to 2 years ( I am expecting my 2nd baby next year) to finish. That is why I am concerning about this problem. I hope I can have "a room" for building plane except for the basement...</DIV>
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<DIV>Regards,</DIV>
<DIV> </DIV>
<DIV>Mike Shih</DIV>
<DIV><BR><B><I>Dean Pappas <d.pappas@kodeos.com></I></B> wrote:</DIV>
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<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>Hello Mike,</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>Humidity is a problem, and your dehumidifier is a good idea.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>You should only need to keep the relative humidity under about 50%, generally.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>An unsupported sheet of wood may buckle, and this is generally a sign that the wood was sawed into sheets before it was properly dried, or cut skewed to the grain of the log.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>The situation gets better when the airplane is built, but I have had an airplane change trim after flying half a flight in rainy conditionns at a major contest.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>Three weeks of Summer heat restored the plane's original trim. </FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>Since then, I have not honeycombed my foam wings.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>I had no such problem with an earlier, non-honeycombed, plane that I flew in heavy rain, at the '89 Team trials in Pensacola.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>How humid is your basement? You may need that dehumidifier.</FONT></SPAN></DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=935404417-11112004><FONT face=Arial color=#0000ff size=2>Regards,</FONT></SPAN></DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT face="Times New Roman">Kodeos Communications</FONT> <BR><FONT face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>shih mike<BR><B>Sent:</B> Thursday, November 11, 2004 12:08 PM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> question regarding building balsa wood plane ?<BR><BR></FONT></DIV>Hi Builders, <BR>I got a quick question which might sounds stupid to you. <BR>Usually it takes me about a year to finish building a 60 size balsa wood pattern plane. I found the wood tends to twist or warp a bit after sit on the bench in the basement for few months (half finish). I use the de-humidifier to adjust the humidity at the basement. It is kind of bothering me to have the machine on all the time. I don't know if the humidity is really the cause? how long do you think that I can left the wood or half finish plane sits in the basement without special care? <BR><BR>Thanks very much
<DIV> </DIV>
<DIV>Mike </DIV>
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