I just ordered G/Flex 655 Epoxy - 8 oz as my Christmas gift. I hope that it is a good replacement for G5000 Ricket-Poxy. That will be a big relief for us fanatical builders.
working on my first rocket and i have my filets at 1/4 inch wide from the body tube to the edge of my tape. is that wide enough? is there a formula for this? i went with west coast and their filler.
@@daytonpyro It all depends on the size of your rocket. If you sand your fillets smooth, there will be no problem with the flight. The only thing that larger fillets do is add weight; however, your fins will be stronger than most rockets.
The Bob Smith epoxy is good for general use but it can be runny. It's like honey, you put it in one spot then in a few minutes it seems to be everywhere. I've made fillets with it by turning the rocket on its side and slowly pouring on a little bit along the fin root. It gradually self levels so your fillet is not curved, it's triangular. I put a piece of tape on at each end of the fin root to form a dam to keep the epoxy from running off the ends of the fin root onto my table. After it has cured I take the tape off and sand the edges smooth.
RocketPoxy G5000 is excellent for fin fillets. My Estes Mean Machine crashed, and the only thing on the body tub that wasn't destroyed was the fin fillets.
I like Rocketpoxy for fillets where you have already done internal fillets with something else. It doesn't soak into the materials so I wouldn't use if I'm doing external fillets only. BSI is good stuff but I like to stick with the 30 min. formula as I feel the quicker drying epoxies don't have time to soak into the materials. When using BSI I like to heat the materials and let the epoxies soak in hot water for a few minutes as it flows and creeps better when warm.
I was just thinking since I have noticed when some rockets are on the pad baking in the sun waiting to be launched, there have been observed instances that some epoxies become a little pliable and fins may wobbles or just come off. Thank you for the reply though. Much appreciated 🙂👍🚀🪂
I just ordered G/Flex 655 Epoxy - 8 oz as my Christmas gift. I hope that it is a good replacement for G5000 Ricket-Poxy. That will be a big relief for us fanatical builders.
working on my first rocket and i have my filets at 1/4 inch wide from the body tube to the edge of my tape. is that wide enough? is there a formula for this? i went with west coast and their filler.
@@daytonpyro It all depends on the size of your rocket. If you sand your fillets smooth, there will be no problem with the flight. The only thing that larger fillets do is add weight; however, your fins will be stronger than most rockets.
Tim, your videos are such an amazing resource. Thanks for shooting and sharing.
Glad to help.
Tim, as always, your videos and explanations are very understandable and educational.
Thanks for always posting videos.
Very welcome
Great primer on different epoxies!
Thank you! Cheers!
The Bob Smith epoxy is good for general use but it can be runny. It's like honey, you put it in one spot then in a few minutes it seems to be everywhere. I've made fillets with it by turning the rocket on its side and slowly pouring on a little bit along the fin root. It gradually self levels so your fillet is not curved, it's triangular. I put a piece of tape on at each end of the fin root to form a dam to keep the epoxy from running off the ends of the fin root onto my table. After it has cured I take the tape off and sand the edges smooth.
RocketPoxy G5000 is excellent for fin fillets. My Estes Mean Machine crashed, and the only thing on the body tub that wasn't destroyed was the fin fillets.
What about JB weld?
This video was about the products that we currently sell. I'm sure JB Weld has its applications.
JB Weld is great for high heat applications like motor retainers. It's too brittle for most other rocketry applications.
I like Rocketpoxy for fillets where you have already done internal fillets with something else. It doesn't soak into the materials so I wouldn't use if I'm doing external fillets only.
BSI is good stuff but I like to stick with the 30 min. formula as I feel the quicker drying epoxies don't have time to soak into the materials. When using BSI I like to heat the materials and let the epoxies soak in hot water for a few minutes as it flows and creeps better when warm.
Which epoxy becomes soft in a hotter environment?
I haven't tested that. Sorry. You're welcome to try it out and report back to us.
I was just thinking since I have noticed when some rockets are on the pad baking in the sun waiting to be launched, there have been observed instances that some epoxies become a little pliable and fins may wobbles or just come off. Thank you for the reply though. Much appreciated 🙂👍🚀🪂
Thank you Tim!
My pleasure!
hmmm that 15 min epoxy is like peanut brittle. interesting