Mike, I am assuming that the difficulty in removing it stems from it being a non-metallic mandrel, as it would be much easier to damage the phenolic? Some...
Naptha works to good effect removing wax in my experience. Though it is solvent and therefore a batch becomes contaminated to the point it is no longer...
Leaving the foam in there is good sometimes, and just drilling out a core to put your electronics in, like what the last poster said. In the event of a...
I have done it this way (teh threaded rod home-made rotisseri, and the foam circles would come free of the threaded rod, spin loose, so I started using a t-nut...
... that's interesting - we're talking about the blue styrofoam, right? I expect the styrene in the polyester resin would eat the blue foam. but your latex...
I have never done vac bagging before, but have been kicking around the idea of using some of these space-saver linen vac bags I have here at home. Anybody...
You may want to look at a few websites before checking it out. I don't know the specs of the vac bag that you are referencing, regardless of what system you...
the vacuum cleaner bags only hold 1-3 psi it is easy to get the food saver big roll of tube plastic and use it but it only goes to a max of 5.5" diameter tubes...
I have only ever used pink foamboard, and did not realize there is a difference b/t one color and another. But, as to your question, latex pant, brushed on,...
... difference b/t one color and another. There is no real difference in chemical makeup with EPS boards due to color. It is merely a trademark. Dow...
Uh, make the plug the right size and put on the right number of layers of cloth? ;) Having the project end up the right size is the trick, but a little ...
Lakestake Rocketry
lakestake@...
Mar 3, 2009 4:08 am
8765
ha, I was hoping it would be that easy. I wasn't sure if there were differences in cloth thickness after it had been wet down with epoxy. Ian...
Yes Ian, each kind of cloth has a certain 'thickness'. Check out Mick's spreadsheet in the files section to get a feel for how much cloth to use. Whether you...
Lakestake Rocketry
lakestake@...
Mar 3, 2009 4:25 am
8767
Anybody ever use Aeropoxy 2032/3660 with West System pumps? West has pumps for 3:1 by volume (Aeropoxy is 100:33 by volume)and they fit the standard size...
Tomorrow I plan to glass the inside of a coupler for the fincan. I plan to use 2 wraps and then wet out a layer of peel ply over it. I will then inflate a...
I can't think of any pitfalls. I don't spend that much time on mine. No one will see it so I don't care what it looks like, and I don't typically care about...
Pop the ballon, after the epoxy gels, but before its fully hard. Wedge ... From: Greg Gleason To: Composite Rockets Sent: Monday, March 02, 2009 8:43 PM ...
Which pumps are those? I have a set of pumps designed for the 105 resin and the 205 or 206 hardener and that ratio is 5 to 1 (resin to hardener). Anyway, you...
O.K. so I just found the 3 to 1 pumps. Sorry. I've never used that product. 306-23 Metering Pump Similar to 306-25 Metering Pump described above. For metering...
... A member in my club posted a very funny story about this exact same process. I'll ask him if it's ok to repost here... Eldred -- I'm raising donations for...
Greg, I can think of two potential problems . . . (1) You might want to "double up" on the balloons to give a little more pressure and reliability ( against...
Peel Ply can be very hard to peel off. Would be even more dificult inside a coupler. (Unless you are using the teflon coated stuff) I would just use parchment...
I have done dozens of couplers and have never seen a balloon strong enough to distort the tubing, but... I have had a lot of trouble with balloons moving the...
Lakestake Rocketry
lakestake@...
Mar 3, 2009 5:06 pm
8779
To All, The use of "cylindrical latex balloons", commonly found at your local pharmacy, can give excellent results. Just be sure to purchase "smooth, plain...
I was just going to say what Matt did. When you put the balloon in, and start to inflate it....Make sure you've got it pretty much in the center (length-wise)....
Been there, Done that......Works well on larger tube diameters. For Very large tubes, some party store sell "HAPPY BIRTHDAY" balloons, but beware some have sat...
Last time I glassed the inside of a six inch coupler, I set it on it's end, lined it with mylar, and poured dry sand inside. Packed it down a little and let it...
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