<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div>Thanks to all for your help...</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757">Sent via the Samsung Galaxy S® 6, an AT&T 4G LTE smartphone</div></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: Matthew Kebabjian via NSRCA-discussion <nsrca-discussion@lists.nsrca.org> </div><div>Date: 1/26/2016 5:41 PM (GMT-06:00) </div><div>To: "Atwood, Mark" <atwoodm@paragon-inc.com>, General pattern discussion <nsrca-discussion@lists.nsrca.org> </div><div>Subject: Re: [NSRCA-discussion] CF End Grain sheet for Servo/Battery tray? </div><div><br></div></div><div>You right on cheapest, easiest. Lightest is still carbon laminated 2 lb honeycomb. Next lightest is carbon laminated cross grained balsa, about 6 lb stock, which is actually stronger than the honeycomb. But both of these solutions cost 5x what the balsa -ply composite costs. I make the carbon-balsa for firewalls in my gas planes. The 1/4" is plenty strong for 60cc engines.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">The carbon laminates are available from ACP. For those that still make some stuff for your models, I've written about this type of lamination before but might be worth repeating....use a food saver vacuum bag. The honeycomb will require support plates, both sides. I use plexiglass from Home Depot, waxed with PartAll. Balsa needs nuthin.<br><br><br><div>Matt Kebabjian</div><div><br></div></div><div><br>On Jan 26, 2016, at 5:07 PM, Atwood, Mark via NSRCA-discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>> wrote:<br><br></div><blockquote type="cite"><div>
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For me, the lightest, cheapest, strongest, and easiest to make servo tray has always been 1/8” balsa, laminated with 1/64” ply on both sides, with small 1/32” ply doublers where the servo screws go. It’s 2 minutes to laminate a piece of balsa with thick CA
and hand pressure. never splits, easy to cut and shape, torsionally strong and stable, extremely light and very very inexpensive.
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<b style="font-size: 11pt; text-align: -webkit-auto; orphans: auto; widows: auto;" class=""><span style="font-family: Lato, sans-serif; color: rgb(101, 100, 106);" class="">MARK </span></b><b style="font-size: 11pt; text-align: -webkit-auto; orphans: auto; widows: auto;" class=""><span style="font-family: Lato, sans-serif; color: rgb(128, 189, 1);" class="">ATWOOD</span></b></div>
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<div class="">On Jan 26, 2016, at 4:48 PM, Peter Vogel via NSRCA-discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org" class="">nsrca-discussion@lists.nsrca.org</a>> wrote:</div>
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He was talking about servo trays, but I agree, very brittle, layer joints aren't often very strong <br class="">
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On Tue, Jan 26, 2016 at 12:57 PM -0800, "Anthony Romano via NSRCA-discussion"<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:nsrca-discussion@lists.nsrca.org" target="_blank" class="">nsrca-discussion@lists.nsrca.org</a>></span><span class="Apple-converted-space"> </span>wrote:<br class="">
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<div dir="ltr" class="">I would test that thoroughly before committing to a critical part like a battery tray. Most 3D printed parts have limited strength due materials as well as the "grain" created in the printing process. Use them a lot for prototyping at
work but they rarely last.
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To:<span class="Apple-converted-space"> </span><a href="mailto:vanputte@cox.net" class="">vanputte@cox.net</a>;<span class="Apple-converted-space"> </span><a href="mailto:nsrca-discussion@lists.nsrca.org" class="">nsrca-discussion@lists.nsrca.org</a><br class="">
Date: Tue, 26 Jan 2016 20:46:35 +0000<br class="">
Subject: Re: [NSRCA-discussion] CF End Grain sheet for Servo/Battery tray?<br class="">
From:<span class="Apple-converted-space"> </span><a href="mailto:nsrca-discussion@lists.nsrca.org" class="">nsrca-discussion@lists.nsrca.org</a><br class="">
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<p class="ecxMsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Now that I have a 3D printer, I’m gonna try printing my servo trays in my next build. Should be an easy part to design and pretty strong.</span></p>
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<p class="ecxMsoNormal" style="text-indent: -0.25in;"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 78, 121);" class=""><span class="">-<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';" class=""> <span class="Apple-converted-space"> </span></span></span></span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 78, 121);" class=""> Robert
Beaubien</span></p>
<p class="ecxMsoNormal" style="text-indent: -0.25in;"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 78, 121);" class=""><span class="">-<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';" class=""> <span class="Apple-converted-space"> </span></span></span></span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 78, 121);" class=""> <a href="http://droneplastics.com/" class="">DronePlastics.com</a></span></p>
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<p class="ecxMsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">“Dear Algebra, Please stop asking us to find your X. She's never coming back and don't ask Y.”</span></p>
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<p class="ecxMsoNormal"><b class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="Apple-converted-space"> </span>NSRCA-discussion
[<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org" class="">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>]<span class="Apple-converted-space"> </span><b class="">On Behalf Of<span class="Apple-converted-space"> </span></b>Ronald Van Putte via
NSRCA-discussion<br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Tuesday, January 26, 2016 1:45 PM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span>General pattern discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org" class="">nsrca-discussion@lists.nsrca.org</a>><br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [NSRCA-discussion] CF End Grain sheet for Servo/Battery tray?</span></p>
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<p class="ecxMsoNormal">I have been using trays made from 1/8" 5-ply plywood, with 6mm carbon fiber tubes down the sides.</p>
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<p class="ecxMsoNormal">On Jan 26, 2016, at 2:27 PM, Stuart Chale via NSRCA-discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org" class="">nsrca-discussion@lists.nsrca.org</a>> wrote:</p>
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<p class="ecxMsoNormal">I like 1/8" fiberglass end grain balsa sheet. Still pretty light and strong and probably cheaper than the carbon fiber equivalent. <br class="">
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On Jan 26, 2016, at 2:24 PM, Larry Diamond via NSRCA-discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org" class="">nsrca-discussion@lists.nsrca.org</a>> wrote:</p>
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<p class="ecxMsoNormal">What are you using for Servo/Battery trays and where is the best source?</p>
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<p class="ecxMsoNormal"><span style="font-size: 10pt; color: rgb(87, 87, 87);" class="">Sent via the Samsung Galaxy S® 6, an AT&T 4G LTE smartphone</span></p>
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