- Joined
- Oct 2, 2018
- Messages
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- 325
I'd just get a new stiffy coupler and rebuild the top section with some fresh pieces. Really too bad when that happens. I see why guys use plastic rivets on the big stuff.
Yeah, I saw that happen. It was painful to witness.On the subject of drag separation - I suffered a catastrophic separation at Midwest Power. My first flight was on a J275 and it was picture perfect. So, naturally I had to try a K185 long burn Well, about 2 seconds into an 8 second burn the nosecone popped off and the rocket shredded. It seems odd to me that I’d suffer a separation on my second flight and at much lower altitude and speed than the J275, but that’s my best guess as to what happened. At any rate, here’s my before and after photos for your viewing pleasure(?).
View attachment 437499
View attachment 437498
The good news is the fin can is completely solid still and I can probably do something with it - still have to figure out what exactly. Any ideas?
And a replacement Goblin is on order already
~Dave~
What size vent hole did you have in the bottome/booster?On the subject of drag separation - I suffered a catastrophic separation at Midwest Power. My first flight was on a J275 and it was picture perfect. So, naturally I had to try a K185 long burn Well, about 2 seconds into an 8 second burn the nosecone popped off and the rocket shredded. It seems odd to me that I’d suffer a separation on my second flight and at much lower altitude and speed than the J275, but that’s my best guess as to what happened. At any rate, here’s my before and after photos for your viewing pleasure(?).
View attachment 437499
View attachment 437498
The good news is the fin can is completely solid still and I can probably do something with it - still have to figure out what exactly. Any ideas?
And a replacement Goblin is on order already
~Dave~
What size vent hole did you have in the bottome/booster?
If you use epoxy it is a tank; I have launched everything from H's to J's. It is now my test platform and just a workhorse. The choice of 29mm, 38mm, and 54mm allows for a launch as long as a motor vendor is on the field.Really tempted to get the LOC Goblin. Digging the idea of square fins and wood glue. Fast and easy build is quite attractive.
https://www.rocketryforum.com/threads/cert-1-and-2-jolly-logic-challenge.158100/What fillet size y'all using? Most pics I've seen look like the internal fillets are pretty thick...tongue depressor-ish? External fillets seem smaller -- presumably because the fin can is so stout.
If you use epoxy it is a tank; I have launched everything from H's to J's. It is now my test platform and just a workhorse. The choice of 29mm, 38mm, and 54mm allows for a launch as long as a motor vendor is on the field.
I just made it through all nine pages of this thread after skipping over past it many many times, and I was most impressed by the use of Ultracote to eliminate that entire painting process. Looks like I now have to go on YouTube and learn all about how to apply Ultracote.
I'm rather amazed that I have never seen a thread on this before where you would think that this would be one of the most highly used techniques to eliminate all of the painting in rocketry. There must be something really disadvantageous to do it this.
I just made it through all nine pages of this thread after skipping over past it many many times, and I was most impressed by the use of Ultracote to eliminate that entire painting process. Looks like I now have to go on YouTube and learn all about how to apply Ultracote.
I'm rather amazed that I have never seen a thread on this before where you would think that this would be one of the most highly used techniques to eliminate all of the painting in rocketry. There must be something really disadvantageous to do it this.
There's a BIG disadvantage to Ultracoat IMHO...It's largely because of ding dongs such as myself. I tend to abuse the finish of my rockets. I try to be careful but I fear that putting in the extra work and money (although I don't know that it's much more expensive than paint) to make it look so pretty means it's doomed to scratching and the like. Flying the rocket is not the issue - its the transportation or road rash as its called. Currently, I am working on creating good rocket transport habits but I am not quite there where I want to ultracoat everything - yet. I may get there someday. It's a process.
You mean I’m not the only one who just chucks a bunch of rockets into the back of the car for the trip to the launch?
Good to know…
Maybe we could start a support group.
There's a BIG disadvantage to Ultracoat IMHO...It's largely because of ding dongs such as myself. I tend to abuse the finish of my rockets. I try to be careful but I fear that putting in the extra work and money (although I don't know that it's much more expensive than paint) to make it look so pretty means it's doomed to scratching and the like. Flying the rocket is not the issue - its the transportation or road rash as its called. Currently, I am working on creating good rocket transport habits but I am not quite there where I want to ultracoat everything - yet. I may get there someday. It's a process.
Not for a typical launch, no.Ya'll don't even wrap them in a blanket or anything?
I don't know about that.You can't have too many bats!
Ya'll don't even wrap them in a blanket or anything?
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