Can JB Weld Survive Mach 2? (1,700 MPH / 2,700 Km/h)
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- Опубликовано: 4 июл 2024
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This is it, folks! In the final battle of J-B Weld vs. supersonic rocket powered flight, I build a 75mm minimum diameter rocket that my Patreon supporters and I dubbed "Third Charm's the Try" and fly on a Cesaroni M1675 Pink rocket motor. The projected top speed is around Mach 2.2, or around 1,700 MPH (2,700 Km/h). This rocket was built only with J-B Weld and J-B Quick for structural bonding. There is no tip-to-tip composite layup, no fillers in the epoxy, and no other reinforcement of any type. It's just a good composite bond with J-B Weld and some meticulous surface preparation.
Want to see the other JB Weld Builds? Here they are!
• Can JB Weld Survive 1,...
• JB Weld Rocket vs. Sup...
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Love this so much - I still think the next logical step is to roll your own tubes using JB weld instead of laminating epoxy
That is so incredibly cursed. Might not be too painful on a small size. 29mm JB weld rocket?
I’m telling you Joey it’s the way to go!
Make the JB-Wocket
If the Hot Glocket can be made so can the J.B. WEEEEEEEELD
If JB Weld didn't survive this, nothing else would have either. I used it for my last two rockets including a 54mm minimum diameter kit and a 2.6" Pike that flew an L805 on its maiden flight. When I was a teen in '86, I used it to repair a cracked bell housing on my Thunderbird and she just kept right on a-truckin'. Also, you kids need to get off my goddamn lawn.
Dude that's sick AF! What's even more crazy is the speed that rocket traveled, burning the paint off the nose cone with sheer air friction! Great job new subscriber here.
If Joe Barnard can make a high power rocket from hot glue, you can definitely make one entirely from JB Weld 😂 🚀.
We talked about that on our podcast with Joe recently! It's definitely possible but I'm not sure it's worth it lol
You could use that rocket with the same motor as a booster attached to a sustainer with a long-burn motor like the Aerotech M685W-PS with an 11.3 second burn time. Maybe it'll touch Mach 2.5 and hit 50K feet? It would be another great test of the limits of JB Weld.
Using the booster with the glued in coupler might present some issues, but it could definitely be done. Maybe some day
Congratulations!
Awesome flight!
I think it needs to be left "as is"
Take it along with you as a "show piece"
Great videos man, just got into this RUclips genre, and Amateur Rocketry myself, and it's fascinating for someone who knows organic chemistry damn well.
Great vid, and awesome flight!
We need a full jb weld rocket
Congratulations on a great flight!
Sick flight Braden. Great build overall. Love the pink motor and the glitter print job.
Display it like a trophy man. Good job, and thank you for the decals they looked great.
Dude that was awesome
Congrats on a great flight! ... Sounds like you need to paint the rocket with JB Weld :)
So glad I found your channel. You should have a lot more subscribers.
Good job... It was flown art FAR. I fly my own home brew M in min diameter rockets there as well.
You're a brave soul for using the chute release but hey man it worked and congrats! I had a brand new JL chute release sit in my gear box for years, and after seeing soooo many others fail with it I ended up gifting it to my local club for fund raising. My 1st min dia just showed up from Tim, so I need to figure out the whole chute deploy without a release. Awesome flight Braden!
De-gassing should also help the epoxy mix be more consistent from batch to batch.
Convert it to a booster and stage it with a min-diameter 54mm 🙂. With a longer burn booster and a long-burn K in the sustainer, I bet you could push 40k.
Now do an actual JB Weld rocket cast from JB Weld instead of just glued together with JB Weld.
Would mixing in glass balls/fibers or carbon fiber chop into the JB weld help the strength on the fillets? Might make it harder to get smooth, but that's what sanding and paint is for.
I have a theory that adding milled glass or chopped carbon doesn't really do anything for strength more than any other thickening agent would considering both get their strength from the weave of cloth or the wind angle when filament wound.
I think adding anything to JB Weld would just make it unusably thick lol
Cool
I'm curious if you could seal in the pain effects of the first flight by doing a resin hot-coat instead of clear paint? Then you could fly it again...
Because if you don't fly it, it isn't a rocket anymore.
At that point, I'd just be adding a tone of unnecessary weight on top of all the already unnecessary weight. Realistically, if I decide to fly it again, it's all getting sanded off.
Would this thing sonic boom? I heard something at 13:06 ??
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have you thought of using JB Weld as the epoxy base for your fibreglass or carbon fibre ?
I've considered it but I'd have to test to see if thinning it enough to laminate with it is functional
@@RocketVlogs Use the slowest version and heat it, rather than adding some thinner. Assuming that JB Weld has a slow version.
@@lr21643 The standard JB Weld is the slowest version to my knowledge. However, heating epoxy up is a great way to make it cure faster 😉
Jb weld bussin
jb weld the world
Sand all the paint off? Nah, give it a bunch of clearcoat. It will survive for at least the first 50 feet.
How much heavier do you think JB weld is vs thickened epoxy?
definitely heavier if not just as heavy. i just built a stretched loc kit with jb weld and its significantly heavier than it was supposed to be
Hard to day depending on epoxy and thickening agent. For example, West System thickened with Colloidal Silica is quite light, but using a fairly thick high-performance epoxy like hysol or Proline 4500 is really the optimal solution for a project like this.
Badass!
The last two flights of my (now "retired") L1 & L2 rocket hit Mach 1.3 & 1.5 respectively, ̶ ̶a̶n̶d̶ ̶I̶ ̶u̶s̶e̶d̶ ̶a̶ ̶j̶o̶l̶l̶y̶ ̶l̶o̶g̶i̶c̶ ̶w̶i̶t̶h̶ ̶z̶e̶r̶o̶ ̶i̶s̶s̶u̶e̶s̶.̶ ̶ ̶I̶ ̶d̶i̶d̶ ̶h̶a̶v̶e̶ ̶a̶n̶ ̶i̶s̶s̶u̶e̶ ̶o̶n̶ ̶a̶n̶ ̶e̶a̶r̶l̶i̶e̶r̶ ̶f̶l̶i̶g̶h̶t̶ ̶w̶h̶e̶n̶ ̶I̶ ̶s̶e̶t̶ ̶i̶t̶ ̶u̶p̶ ̶i̶m̶p̶r̶o̶p̶e̶r̶l̶y̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶m̶a̶i̶n̶ ̶p̶o̶p̶p̶e̶d̶ ̶a̶t̶ ̶A̶p̶o̶g̶e̶e̶,̶ ̶I̶ ̶t̶h̶i̶n̶k̶ ̶I̶ ̶s̶c̶r̶e̶w̶e̶d̶ ̶u̶p̶ ̶t̶h̶e̶ ̶a̶t̶t̶a̶c̶h̶m̶e̶n̶t̶ ̶p̶o̶i̶n̶t̶(̶s̶)̶ ̶f̶o̶r̶ ̶i̶t̶.̶.̶
EDIT: I struck through that statement because the more I think about it, the more I realized It could very well have popped main at apogee, but I just have no idea because it was outta sight and I never saw it come down (thank god for tracking). Either way after I saw this video I'm going to use cable cutters if the design calls for something like this.
the praise:
1. This is of course awesome. A minimum Diameter M that is SHORTER than all the ones I've built so far, YES PLEASE!
2. I got a lot of ideas & helpful information from this (degassing epoxy, the way you did the recovery setup, High altitude ejection charges, etc.). I could see how your recovery setup could also be used for a booster in a 2 stager, which I'm sure people have used before I just hadn't done the research yet. I want to do a small 2 stager this year (some combination of H & H or I, just to get the electronics & process down)
3. CAN you paint a mach 2+ rocket that doesn't have it's paint do that?
No criticisms! :)
I don't think it's related to the speed, necessarily. I've had this particular Chute Release do this a couple of times with some flights and work fine with others.