@@TheRocketeer It is well deserved sir. Does it make any difference whether you use 70 or 91% alcohol? This stuff is impossible to find in the stores these days.
@@petworthtraction The 70% will work just fine. The higher concentration is helpful in removing stubborn epoxy smudges off the airframe and workspace. I purchased mine at Big Lots.
I just used the Rocketpoxy for the first time yesterday, but my 1:1 ratio was much thinner than yours was. I had to hold the cup over the filet so it wouldn't drip off the stick onto the airframe. It set up well enough and the bond is very strong (as expected). Thanks for that tip about changing the end of the craft stick to get in those tight areas behind the fin. I could have used that yesterday.
There are two conditions that can change the viscosity, temperature and age of the product. My basement is cool in the winter time so the product can be a little thick. After about a year the epoxy starts to become a bit stiff. I have ordered Rocketpoxy twice and have not noticed it that thin. I don't think this will affect the strength of the fillet.
So I made a big mistake doing my fillets yesterday. I had an emergency come up and was not able to remove the tape. This am the epoxy is hard as a rock and I have many areas where the tape is stuck to the rocket under the epoxy. What is the best way to clean that mess up?
I recently removed epoxy inside an airframe with a Dremel and a 1 1/4 abrasive wheel. Use the Dremel at half speed and carefully trim along the tape line. This should break the bond at the tape then remove. There will probably be a blunt edge that can be smoothed out with a burr or diamond ball also mounted to the Dremel. Use wood putty or auto body filler (Bondo) to repair and smooth the joint. Good luck and I hope all is well with your family. Chuck
@@TheRocketeer Thanks, I did this and it seems to be looking good. Got 99.5% of the tape off / out from under the joint and then bondo over that edge. Seems to be good so far. I bet I don't mess up by doing this again. LOL
Rocketpoxy is considerably more expensive than Bob Smith's epoxy. Is it really worth the extra cost? In your application after you applied the Rocketpoxy didn't run anywhere. To me that's pretty appealing.
I like RocketPoxy because it has that just right peanut butter consistency. Nice smooth fillets with no runs. I find it needs to be at least 70-75 F or it is a little stiff to mix. The 2 pint size is enough for about 6 high power rockets. I think it is worth the cost for me. You can find it at MadCow on sale now: www.madcowrocketry.com/g5000-rocketpoxy-2-pint/ You can also buy 8 OZ here: www.buyrocketmotors.com/rocketpoxy-g5000-high-strength-epoxy-8oz-with-black-pigment-10-mixing-sticks/ J-B Weld will also work but it always seems to end up a big smeared mess when I use it: www.amazon.com/J-B-Weld-8281-Professional-Reinforced/dp/B014OVHAOY/ref=sr_1_2?dchild=1&keywords=jb+weld&qid=1606825734&sr=8-2 I find that Bob Smith is too runny for me and tends to drip along with plenty of air bubbles. That does not mean it is not useful. I prefer RocketPoxy for filetts. J-B Weld has high heat resistance so I use that on motor mount centering rings. The Bob Smith (BSI) is great for internal filetts because it will run alongside the fin. I am not sure the J-B Weld is absolutely necessary on the motor mount. You could use BSI instead to save $. I hope that helps, Chuck
@@TheRocketeer Chuck, thanks for your valuable input. After going back and forth many times like Connors-McEnroe I decided in favor of BSI. I have some on hand and it's much cheaper than RcketPoxy. Had Madcow actually had some in stock at their sales price I am sure I would have gone in that direction.
After sitting on my Loc Precision V2 for a few years fearing that I'd screw up putting fillets on the fins I finally got started. The Bob Smith ran all over the place. It's nothing that can't be fixed with sandpaper but our time is money. If the 2 pint package will do about 6 rockets it's reasonable to assume that the 8 oz package will do 1.5 rockets. I'd be interested in knowing what the self life is for RocketPoxy. For most people 6 rockets would take a few years if not a lifetime to complete. Hindsight being 20/20 I should have splurged on the RocketPoxy.
You can increase viscosity with epoxy fillers, fumed silica or microballoons can turn a liquid epoxy into a putty or peanut butter consistency, and the effect is completely controllable by how much you add. You can get away with using considerably cheaper epoxies (I use $50/gallon no-name ebay epoxy on my HPR rockets) and a variety of fillers to replicate some much more expensive purpose-made epoxies.
I started one of the most successful Nar section in United States so I understand the obsession of rocketry. . .but High power costs are so off the charts it doesn't really make sense.
I have not spent thousands on a flight but I enjoy high power rocketry because it is challenging. Planning, building, calculating the sim and then casting the fuel. All that adds up to a sense of accomplishment and satisfaction.
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
Just started using this stuff. It makes all the difference in the world! Great stuff!
Great little trick with the isopropanol for smoothing.
Excellent. You kept it short, simple and easy to follow.
Thanks!!
Super easy to understand and well produced video. Thanks for shooting and sharing.
Wow, thanks for the great comment!
@@TheRocketeer It is well deserved sir. Does it make any difference whether you use 70 or 91% alcohol? This stuff is impossible to find in the stores these days.
@@petworthtraction The 70% will work just fine. The higher concentration is helpful in removing stubborn epoxy smudges off the airframe and workspace. I purchased mine at Big Lots.
I just used the Rocketpoxy for the first time yesterday, but my 1:1 ratio was much thinner than yours was. I had to hold the cup over the filet so it wouldn't drip off the stick onto the airframe. It set up well enough and the bond is very strong (as expected).
Thanks for that tip about changing the end of the craft stick to get in those tight areas behind the fin. I could have used that yesterday.
There are two conditions that can change the viscosity, temperature and age of the product.
My basement is cool in the winter time so the product can be a little thick. After about a year the epoxy starts to become a bit stiff. I have ordered Rocketpoxy twice and have not noticed it that thin. I don't think this will affect the strength of the fillet.
RocketPoxy is the best! I have had some nasty crashes and the fillets have been the only part of the rocket which wasn't destroyed.
Thanks for your comment!
Great Job
So I made a big mistake doing my fillets yesterday. I had an emergency come up and was not able to remove the tape. This am the epoxy is hard as a rock and I have many areas where the tape is stuck to the rocket under the epoxy. What is the best way to clean that mess up?
I recently removed epoxy inside an airframe with a Dremel and a 1 1/4 abrasive wheel.
Use the Dremel at half speed and carefully trim along the tape line. This should break the bond at the tape then remove. There will probably be a blunt edge that can be smoothed out with a burr or diamond ball also mounted to the Dremel. Use wood putty or auto body filler (Bondo) to repair and smooth the joint.
Good luck and I hope all is well with your family.
Chuck
@@TheRocketeer Thanks, I did this and it seems to be looking good. Got 99.5% of the tape off / out from under the joint and then bondo over that edge. Seems to be good so far. I bet I don't mess up by doing this again. LOL
Great video thanks for sharing!
Thanks for watching!
Rocketpoxy is considerably more expensive than Bob Smith's epoxy. Is it really worth the extra cost? In your application after you applied the Rocketpoxy didn't run anywhere. To me that's pretty appealing.
I like RocketPoxy because it has that just right peanut butter consistency. Nice smooth fillets with no runs. I find it needs to be at least 70-75 F or it is a little stiff to mix. The 2 pint size is enough for about 6 high power rockets. I think it is worth the cost for me. You can find it at MadCow on sale now: www.madcowrocketry.com/g5000-rocketpoxy-2-pint/
You can also buy 8 OZ here: www.buyrocketmotors.com/rocketpoxy-g5000-high-strength-epoxy-8oz-with-black-pigment-10-mixing-sticks/
J-B Weld will also work but it always seems to end up a big smeared mess when I use it: www.amazon.com/J-B-Weld-8281-Professional-Reinforced/dp/B014OVHAOY/ref=sr_1_2?dchild=1&keywords=jb+weld&qid=1606825734&sr=8-2
I find that Bob Smith is too runny for me and tends to drip along with plenty of air bubbles. That does not mean it is not useful.
I prefer RocketPoxy for filetts. J-B Weld has high heat resistance so I use that on motor mount centering rings. The Bob Smith (BSI) is great for internal filetts because it will run alongside the fin. I am not sure the J-B Weld is absolutely necessary on the motor mount. You could use BSI instead to save $.
I hope that helps,
Chuck
@@TheRocketeer Chuck, thanks for your valuable input. After going back and forth many times like Connors-McEnroe I decided in favor of BSI. I have some on hand and it's much cheaper than RcketPoxy. Had Madcow actually had some in stock at their sales price I am sure I would have gone in that direction.
After sitting on my Loc Precision V2 for a few years fearing that I'd screw up putting fillets on the fins I finally got started. The Bob Smith ran all over the place. It's nothing that can't be fixed with sandpaper but our time is money. If the 2 pint package will do about 6 rockets it's reasonable to assume that the 8 oz package will do 1.5 rockets. I'd be interested in knowing what the self life is for RocketPoxy. For most people 6 rockets would take a few years if not a lifetime to complete. Hindsight being 20/20 I should have splurged on the RocketPoxy.
You can increase viscosity with epoxy fillers, fumed silica or microballoons can turn a liquid epoxy into a putty or peanut butter consistency, and the effect is completely controllable by how much you add. You can get away with using considerably cheaper epoxies (I use $50/gallon no-name ebay epoxy on my HPR rockets) and a variety of fillers to replicate some much more expensive purpose-made epoxies.
U. R AWESOME
First someone calls me Mister and now you say I am awesome. I sure have come a long ways from mundane : )
So High power rocketeers will spend thousands of dollars on a 30 second or less flight. . .I just don't get it...
I started one of the most successful Nar section in United States so I understand the obsession of rocketry. . .but High power costs are so off the charts it doesn't really make sense.
I have not spent thousands on a flight but I enjoy high power rocketry because it is challenging.
Planning, building, calculating the sim and then casting the fuel. All that adds up to a sense of accomplishment and satisfaction.