It’s been well over 100 Down Under...
Sent from my iPhone
On Dec 28, 2018, at 6:39 PM, Rich Silva
<richsilv@xxxxxxxxxxx<mailto:richsilv@xxxxxxxxxxx>> wrote:
Oh, I was more thinking of a Warmer Climate… Maybe something Southern
Hemisphere?
From: roc-chat-bounce@xxxxxxxxxxxxx<mailto:roc-chat-bounce@xxxxxxxxxxxxx>
<roc-chat-bounce@xxxxxxxxxxxxx<mailto:roc-chat-bounce@xxxxxxxxxxxxx>> On Behalf
Of R Dierking
Sent: Friday, December 28, 2018 5:10 PM
To: roc-chat@xxxxxxxxxxxxx<mailto:roc-chat@xxxxxxxxxxxxx>
Subject: [roc-chat] Re: Epoxy
Good point about the minimum temperature for curing. I’ve left stuff to cure
in the garage overnight and thought there was something wrong with the way I
mixed it in the morning because it was still very sticky.
Must be nice having a separate rocket workshop Allen. I got busted last time I
cured stuff inside the house. Now, all fiberglassing stays in the garage. :-(
I’m going to try the 209 hardener. Thanks.
Richard
On Dec 28, 2018, at 3:11 PM, Rich Silva
<richsilv@xxxxxxxxxxx<mailto:richsilv@xxxxxxxxxxx>> wrote:
No, no, no… You don’t understand how this works…
If the temp is below 65 degrees, you need to move your project to a warmer
Climate!!!
From: roc-chat-bounce@xxxxxxxxxxxxx<mailto:roc-chat-bounce@xxxxxxxxxxxxx>
<roc-chat-bounce@xxxxxxxxxxxxx<mailto:roc-chat-bounce@xxxxxxxxxxxxx>> On Behalf
Of Allen Farrington (Redacted sender "allen.farrington" for DMARC)
Sent: Friday, December 28, 2018 2:13 PM
To: roc-chat@xxxxxxxxxxxxx<mailto:roc-chat@xxxxxxxxxxxxx>
Subject: [roc-chat] Re: Epoxy
You can use the 209SA hardener for the summer.
All of the speeds need to be above 65 degrees F to cure so having a box in the
winter is good.
Allen
Terseness and mis-spelling courtesy of my iPhone
On Dec 28, 2018, at 2:05 PM, R Dierking
<applerocketry@xxxxxxxxxxx<mailto:applerocketry@xxxxxxxxxxx>> wrote:
And, you should consider the size of what you are fiberglassing when picking
fast or slow hardener. But, I tend to overwork stuff and this takes longer.
:-)
I’m now buying just slow hardener. I live in Temecula, and there’s a lot more
warm months than cold ones. I don’t want to be stuck with fast hardener in the
summer, and when the garage is over 90F I even have to work quickly with the
slow.
Hey, just noticed; is this question from October?
Anyway, I suggest slow hardener and in the cold months have a warm place for
the work to cure. I turned an old chest freezer into an incubator with a small
heater and thermostat.
Richard Dierking
(At the end of December)
On Dec 28, 2018, at 1:15 PM, Allen Farrington (Redacted sender
"allen.farrington" for DMARC)
<dmarc-noreply@xxxxxxxxxxxxx<mailto:dmarc-noreply@xxxxxxxxxxxxx>> wrote:
I base it on the temperature. This time of year, fast is a good choice.
Allen H. Farrington
www.allenfarrington.org<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.allenfarrington.org&data=02%7C01%7C%7Cbae6da6709c4470ded3308d66d19ddbc%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636816355190899642&sdata=83jpaknyGaHlH7cN2T6u3nCrOIHiWUb2LLWDWi1oFes%3D&reserved=0>
On Dec 28, 2018, at 12:44 PM, David Erbas-White
<derbas@xxxxxxxxxxxxxxxx<mailto:derbas@xxxxxxxxxxxxxxxx>> wrote:
On 10/23/2018 3:32 PM, Onawahya Jones wrote:
Do you guys use the fast or slow cure hardener for West Systems?
David Erbas-White
I'll put another vote in for West Systems. Depending on where it goes depends
on my mixture
For external fillets I mix up west systems and colloidal silica until I have a
thick mayo consistency. I can pour and shape fillets with minimal work and the
shape is held well until it dries. I pull the masking tape off when everything
has cured a bit. After all that I feather in the joint bond with bondo and a
round file until the transition does not have any lines.
For internal bonds its west systems and chopped carbon fiber It doesn't take
much until it mixes into a workable hairball. Lots of mixing and then poof,
either too much or just enough. I'd call them internal fillets, but mine are
more of an adhesive wall than a fillet.
For general bonding (ebay coupler and vent band) I use west systems without any
additives
For motor retainer bonding I tend to use JB Weld. Although I assume any high
temp epoxy would be sufficient.
The above worked well for my L3 attempt.If it helps at all my build log can be
found here:
https://www.rocketryforum.com/threads/l3-build-log-wildman-interceptor-a-a-d-98.140941/<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.rocketryforum.com%2Fthreads%2Fl3-build-log-wildman-interceptor-a-a-d-98.140941%2F&data=02%7C01%7C%7Cbae6da6709c4470ded3308d66d19ddbc%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636816355190899642&sdata=VDnzTKziVMxGon1SDJNjgeZH74CIdfiO5S2Kdk4oR9Q%3D&reserved=0>
On Tue, Oct 23, 2018 at 3:19 PM Mike Ostby
<mikeostby@xxxxxxxxx<mailto:mikeostby@xxxxxxxxx>> wrote:
I love Aeropoxy. Available from Aircraft Spruce in Corona.
On Tue, Oct 23, 2018, 2:54 PM Jim Wold
<bb.wolf2@xxxxxxxxxxx<mailto:bb.wolf2@xxxxxxxxxxx>> wrote:
What type of epoxy are you using for your fiberglass rockets, West Marine,
Rocketpoxy, Pro Line of something else?
Jim Wold
