LOL, yeah, me too. But CF is a real mess! Not sure I would want the splinters! I just think if you're gonna go through all that effort, why put G10 on it, otherwise use solid aluminum or G10 fins :-) So, sounds like you're having fun with it... Maybe try it with some plywood then, it won't be so heavy but would be a really strong and fun to finish! Here's a picture of the M150 under vacuum, then peeled before sanding. I'm doing my M165 this year the same way, maybe you should camp out and we will do a few "peel sessions" :-) On Thu, Nov 29, 2012 at 10:38 PM, R Dierking <applerocketry@xxxxxxxxxxx>wrote: > If I worked at at place like Dragonplate, I would need a really big lunch > box - you know, for those scrap pieces ;-) > Oh well, I'm using a sheet of 1/8" thick aluminum I bought at a scrap yard > at $5.25 per pound, and left over G-10. Not that I'm cheap (insert joke > here); just want to see if I can build something with this stuff. I'm not > even sure if it will save weight. > I will get the itching kit to see how it works. > > I would be interested in the vacuum set-up. Would you please post some > photos? > Richard > > Sent from my iPad > > On Nov 29, 2012, at 9:50 PM, "James Dougherty" <jafrado@xxxxxxxxx> wrote: > > I think I would break down and buy the whole sheet :-) > http://dragonplate.com/ecart/categories.asp?cID=65 > > > On Thu, Nov 29, 2012 at 8:49 PM, James Dougherty <jafrado@xxxxxxxxx>wrote: > >> Sorry, 1/32" thick G-10 Garolite >> >> http://dragonplate.com/ecart/product.asp?pID=3925&cID=93 >> >> Ouch, pricy, I know ... >> >> But If you could design the fins to fit those sheets... man oh man. >> >> >> On Thu, Nov 29, 2012 at 8:46 PM, James Dougherty <jafrado@xxxxxxxxx>wrote: >> >>> Richard, >>> What laminates are you using? >>> I have a vacuum setup I am not using if you want to borrow it. >>> -james >>> >>> >>> On Thu, Nov 29, 2012 at 8:36 PM, James Dougherty <jafrado@xxxxxxxxx>wrote: >>> >>>> Actually, Richard, disregard, Cotronics is not what you need for this - >>>> I see what you are doing. >>>> >>>> http://www.jamestowndistributors.com/userportal/show_product.do?pid=12214 >>>> >>>> It's an acid wash which chemically alters the surface as you've >>>> described. >>>> >>>> Very cool! Can you send us a full report? >>>> >>>> >>>> On Thu, Nov 29, 2012 at 8:30 PM, James Dougherty <jafrado@xxxxxxxxx>wrote: >>>> >>>>> That's exactly what it is, like an etching primer you use for metal. >>>>> >>>>> Get some Cotronics 4540 Machinable aluminum or 4525. I have some >>>>> I can give you one at the next launch if you need like pre-kitted 2 oz >>>>> batches ;-) >>>>> >>>>> >>>>> On Thu, Nov 29, 2012 at 6:09 PM, R Dierking <applerocketry@xxxxxxxxxxx >>>>> > wrote: >>>>> >>>>>> I'm thinking it's acid based to chemically etch the material and >>>>>> also a film so the aluminum will not oxidize immediately when exposed >>>>>> again >>>>>> to the air. Some people use wet sanding of the aluminum to prevent the >>>>>> oxidation layer that prevents good bonding. For this technique, slow >>>>>> cure >>>>>> epoxy (30 minute) is used and the aluminum surface is wet sanded with the >>>>>> epoxy. I know, it sounds like a big mess, but it works! >>>>>> >>>>>> For my application, I'm looking to bond 1/8" thick aluminum between >>>>>> sheets of 1/32" thick G-10 Garolite for fins. The attached photo shows >>>>>> the >>>>>> aluminum test peice. >>>>>> >>>>>> Anyway, I'm probably going to try the West Systems Aluminum Etch on >>>>>> some test pieces and see if I can pull the layers apart. >>>>>> >>>>>> Richard Dierking >>>>>> ------------------------------ >>>>>> Subject: [tccrockets] Re: Bonding Aluminum to Fiberglass >>>>>> From: bandman444@xxxxxxxxx >>>>>> Date: Thu, 29 Nov 2012 17:31:47 -0800 >>>>>> To: tccrockets@xxxxxxxxxxxxx >>>>>> >>>>>> >>>>>> I don't, when we bonded the aluminum fins to our N5800 rocket we used >>>>>> LOCtite Hysol 9430 and used a sanding while epoxy on approach. It held to >>>>>> Mach 3 so I guess it was ok. >>>>>> >>>>>> The West Systems kit looks interesting. >>>>>> >>>>>> Bryce Chanes >>>>>> >>>>>> Sent from my iPhone >>>>>> >>>>>> On Nov 29, 2012, at 4:51 PM, R Dierking <applerocketry@xxxxxxxxxxx> >>>>>> wrote: >>>>>> >>>>>> Does anyone have experience using the West Systems 860-8 aluminum >>>>>> etch kit for bonding aluminum to fiberglass? >>>>>> >>>>>> Richard Dierking >>>>>> >>>>>> >>>>> >>>> >>> >> >
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