[NSRCA-discussion] CF End Grain sheet for Servo/Battery tray?

[Matthew Kebabjian]

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.

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.


Matt Kebabjian


> On Jan 26, 2016, at 5:07 PM, Atwood, Mark via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
> 
> 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.
> 
> MARK ATWOOD
> President
> o.  (440) 229-2502
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> Powering The Digital Experience
> 
> On Jan 26, 2016, at 4:48 PM, Peter Vogel via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
> 
> He was talking about servo trays, but I agree, very brittle, layer joints aren't often very strong 
> 
> Sent from Outlook Mobile
> 
> 
> 
> 
> On Tue, Jan 26, 2016 at 12:57 PM -0800, "Anthony Romano via NSRCA-discussion" <nsrca-discussion at lists.nsrca.org> wrote:
> 
>> 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.
>> 
>> Anthony
>> 
>> To: vanputte at cox.net; nsrca-discussion at lists.nsrca.org
>> Date: Tue, 26 Jan 2016 20:46:35 +0000
>> Subject: Re: [NSRCA-discussion] CF End Grain sheet for Servo/Battery tray?
>> From: nsrca-discussion at lists.nsrca.org
>> 
>> 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.
>> 
>>  
>> -           Robert Beaubien
>> 
>> -           DronePlastics.com
>> 
>>  
>> “Dear Algebra, Please stop asking us to find your X.  She's never coming back and don't ask Y.”
>> 
>>  
>> From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ronald Van Putte via NSRCA-discussion
>> Sent: Tuesday, January 26, 2016 1:45 PM
>> To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
>> Subject: Re: [NSRCA-discussion] CF End Grain sheet for Servo/Battery tray?
>> 
>>  
>> I have been using trays made from 1/8" 5-ply plywood, with 6mm carbon fiber tubes down the sides.
>> 
>>  
>> Ron
>> 
>>  
>> On Jan 26, 2016, at 2:27 PM, Stuart Chale via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
>> 
>>  
>> I like 1/8" fiberglass end grain balsa sheet. Still pretty light and strong and probably cheaper than the carbon fiber equivalent. 
>> 
>> Sent from my iPhone
>> 
>> 
>> On Jan 26, 2016, at 2:24 PM, Larry Diamond via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
>> 
>>  
>> What are you using for Servo/Battery trays and where is the best source?
>> 
>>  
>> Larry Diamond
>> 
>>  
>>  
>> Sent via the Samsung Galaxy S® 6, an AT&T 4G LTE smartphone
>> 
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