I've been iterating on a new Finbay design for the 3-in Menace project.
Documenting the details on that thread.
Documenting the details on that thread.
3D Printing What Are You Printing Today?
- Thread starter DRAGON64
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"Official" Banana for scale! 
https://www.printables.com/model/925899-the-official-banana-for-scalereference
https://www.printables.com/model/925899-the-official-banana-for-scalereference
rharshberger
Well-Known Member
Imperial/US Customary Units or that other measurement system....."Official" Banana for scale!
View attachment 656105
https://www.printables.com/model/925899-the-official-banana-for-scalereference
rharshberger
Well-Known Member
Got this far on the new 3D printer enclosure before the heat in the garage sent me inside. The front gets a window cut out in it as soon as I get the glass /lexan for it and the lid is designed to lift off and is held on by french cleat method. The box wont be air tight but it will allow airflow with the 98mm fan pulling negative pressure. This is for my new Elegoo Saturn 4 Ultra.
I have used something similar. I did a tip to tip layup over some large fins and I just wet the cloth out with acetone first to get the cloth to stick to the fins (ASA). Once evaporated I just wet it out with epoxy resin and it turned out great. I am curious bout the ABS slush option (though it wouldn't work over the cardboard section).
The epaulets on @ljwilley's 3-in Nike Smoke nosecone got me jelly. I love that detail. I decided to figure out how to make my own. I think these turned out ok. The detached ones are a little thick, but the ones baked into the Nosecone AFT section sit better. Lots of options: To Epaulet or not to Epaulet. I still need to print out the Nosecone AFT with Epaulets to verify it prints and doesn't make a huge mess. I printed it with a .5mm support sprue to improve print completion chances. I have printed 8 with three usable ones. I think I got it dialed in now, with 6 more printing.
Epaulets for the Nike Smoke 3-in Nosecone
Printed Model Completed
Epaulets for the Nike Smoke 3-in Nosecone
Printed Model Completed
ljwilley
I’m pretty sure it will work…
Actually, it's 4-in, and I just upscaled the nose cone from bt55 size to 4-in from this file on thingiverse: https://www.thingiverse.com/thing:3196722
I have not seen that model before. I swear I didn't rip it off. It's a really cool model in clear.
Today, I was puttering around with one of my new Extreme kits, the Bull Pup, and realized how much I hate wrapping tape on the end of Estes BP motors to make a thrust ring. Earlier this week, I watched a few YT videos on the "Tech Ingredients" channel regarding the building of sugar motors, where I got the idea of a thrust ring. I popped over the RCS and looked around and sure enough, I found that they offered 29mm thrust rings for their cases. I figured it wouldn't be difficult to make a model to do the same on the Estes 29mm motors. It only took me 4 iterations. The best part is the motor and the thrust ring fin inside the tail cone retainer for the Bull Pup, which I thought would be an issue.
It's a tight fit. A film of epoxy or thin CA would assist in locking it down but as it is, it's very difficult to pull off, but doable.
It's a tight fit. A film of epoxy or thin CA would assist in locking it down but as it is, it's very difficult to pull off, but doable.
I thought it a bit naughty to talk about the Bull Pup kit without at least a picture. This will be released on Printables soon. If you want an advanced copy, here you go.
It assembles almost exactly like the others I have released. The only difference is you need to epoxy the threaded nosecone coupler into the nosecone. The accessories for this can be found here: https://www.printables.com/model/883157-support-models-for-my-bt6029mm-extreme-series-rock
It assembles almost exactly like the others I have released. The only difference is you need to epoxy the threaded nosecone coupler into the nosecone. The accessories for this can be found here: https://www.printables.com/model/883157-support-models-for-my-bt6029mm-extreme-series-rock
(Reposted from my Laserloc 223 Build Thread) I designed and printed some "disposable" ejection canisters. The hole in the bottom is large enough to allow the leads of the e-matches I have to pass through but tightly with no powder leaks. It can hold 1.5 grams of powder, and 1 gram will reach the top of the match head. 17 x 21mm.
I printed some canisters in ABS to do a live fire test with the Quantum I plan to use to verify 3 things. 1. The Quantum works. 2. The e-matches I have still work. 3. How well the canisters hold up. I been having some stringing issues, normally that is s asign that I need to change the nozzle, but i just did that and didnt fix the issue... so I wonder what else it could be. Thankfully its not to hard to clean it up.
The live fire test went well. The canisters held up nicely, at least outside the airframe. The forward part shrunk a little bit aftwards. Rear measuring 16.99mm and the front end measuring around 16.8mm. I attached the STL so you can make your own canisters if you wish!
I printed some canisters in ABS to do a live fire test with the Quantum I plan to use to verify 3 things. 1. The Quantum works. 2. The e-matches I have still work. 3. How well the canisters hold up. I been having some stringing issues, normally that is s asign that I need to change the nozzle, but i just did that and didnt fix the issue... so I wonder what else it could be. Thankfully its not to hard to clean it up.
The live fire test went well. The canisters held up nicely, at least outside the airframe. The forward part shrunk a little bit aftwards. Rear measuring 16.99mm and the front end measuring around 16.8mm. I attached the STL so you can make your own canisters if you wish!
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Nv7
Well-Known Member
Actively guided TARC rocket!
Oops... I forgot the STLs... Here you go:
I released the Goblin Extreme BT60 Builder's Kit on Printables. If you nab any of these kits and fly them, please let me know how they go for you.
https://www.printables.com/model/948076-goblin-extreme-model-rocket-bt60-with-a-29mm-motor
I forgot to mention that I have not flown this yet. I plan to launch it at my club's next event, and I will post pictures and video.
https://www.printables.com/model/948076-goblin-extreme-model-rocket-bt60-with-a-29mm-motor
I forgot to mention that I have not flown this yet. I plan to launch it at my club's next event, and I will post pictures and video.
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I made a replacement part for a laser cut chess board kit my son was building. One piece was missing from the box and it the part could be designed and printed far quicker than customer service could even respond for a replacement.
This past weekend, I rescaled my 3-in Nike Smoke builder's kit to accommodate a ULINE 2.67-in mailing tube. This is so I can launch smaller (relative) motors at a smaller field.
I also started working on the 4 and 5.5-in rescale but I need to get tubes before going down that road.
I also started working on the 4 and 5.5-in rescale but I need to get tubes before going down that road.
I published an updated nosecone for 3-in Big Red Max / Great Goblin kits on Printables. Last year, I remixed a model for the 3-in BRM after a disastrous failure during my Level 1 attempt. While that model still works, this one is updated to utilize the nosecone ebay. It also has the option to be printed in one or two pieces, both require the shoulder coupler to be printed separately. The model also includes the IPL-inspired nosecone ebay and a plug if you don't want the added sled weight. I think this model is more robust and flexible for my needs. Help yourselves, if you are in the market for a nosecone
Having a play with a full aerofoil fin generator. NACA 0006 looked like a good candidate.
Hollowed it and put a stiffening grid in. Just need to add a tab and figure out profile surface printing. I'll give it a try at 0.1 layer thickness first. 2 halves = 1 fin. Results tomorrow.......
Hollowed it and put a stiffening grid in. Just need to add a tab and figure out profile surface printing. I'll give it a try at 0.1 layer thickness first. 2 halves = 1 fin. Results tomorrow.......
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Gutter screen.
There's a lovely stainless wedge-shaped drainage cover that has a narrow gap, sheds anything not water, and is incredibly expensive.
Not having the budget of a billionaire, I recreated it in SCAD.
Scad file attached if you want some.....
There's a lovely stainless wedge-shaped drainage cover that has a narrow gap, sheds anything not water, and is incredibly expensive.
Not having the budget of a billionaire, I recreated it in SCAD.
Scad file attached if you want some.....
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Just started a 10 hour print on a 750mm long Nike nosecone. Liking the way Bambu lets you cut into pieces. We'll see if it's string or nosecone in the morning...
This morning I posted a couple of models on Printables.
I mentioned the Bullpup in the "What did you do rocket wise today" thread a couple of days ago. Since then, I have tested the interface surfaces and it fits a LOC 3-in tube well. I printed out the fincan, tailcone, and accessories. I am currently working on the nosecone pieces and the coupler. I hope to have this assembled, painted, and ready for launch later this month.
The modified camera mount was used on my Nike Smoke and it works great. With my previous mounts, I was using velcro straps to hold it into position but the new model has a sliding cover, which is nice because the top has button cutouts. I modified the lens opening so I could use my Runcam2 camera as well as the Runcam6. I added mounting holes and embossed the bottom so you can visually identify the body tube size.
AGM-12B Bullpup 2-in Model Rocket
Bullpup OpenRocket Simulation
Bullpup Build Plates
Bullpup Design
Bullpup Mockup
Runcam6 Camera Mounts - Original and Modified
I mentioned the Bullpup in the "What did you do rocket wise today" thread a couple of days ago. Since then, I have tested the interface surfaces and it fits a LOC 3-in tube well. I printed out the fincan, tailcone, and accessories. I am currently working on the nosecone pieces and the coupler. I hope to have this assembled, painted, and ready for launch later this month.
The modified camera mount was used on my Nike Smoke and it works great. With my previous mounts, I was using velcro straps to hold it into position but the new model has a sliding cover, which is nice because the top has button cutouts. I modified the lens opening so I could use my Runcam2 camera as well as the Runcam6. I added mounting holes and embossed the bottom so you can visually identify the body tube size.
AGM-12B Bullpup 2-in Model Rocket
Bullpup OpenRocket Simulation
Bullpup Build Plates
Bullpup Design
Bullpup Mockup
Runcam6 Camera Mounts - Original and Modified
10 hours later...... Cat for scale. Out of Bananas
10 hours later...... Cat for scale. Out of Bananas
I'm bummed out b/c we can't make it to NARAM and it's so close, and my club's launch was canceled due to hot/dry conditions (Colorado is on fire ATM). I went into design mode to distract myself. I found a park bench model that I liked the look of and capped it with a cradle to accommodate a 4-in rocket. To test the print, I scaled it down to 25% and the rocket gods took pity on me. The test print fits BT-20 tubes perfectly. Now I have a display stand for my desk! I put the models up on Printables.
Original Model
Rocket Display Stand
Test Print
Rockets For Ants
Original Model
Rocket Display Stand
Test Print
Rockets For Ants
Over the last couple of days, I have been working on designing an AGM-256 Pitbull in the 2.6-in configuration, trying to maintain the spirit of the OOP LOC model. The fincan takes up most of my 300x300mm bed. Aside from the fincan everything has printed out as expected since I borrowed from other designs.
However, the fincan has been giving me some trouble. I incorporated a boattail in the design with the cutouts on the trailing edge where the fins meet the tail cone. This leaves an area where there isn't a lot of support. I try to keep my supports from interfacing with the part as much as possible to make cleanup easier, but for this design, the practice has proven to be a failure. I love the lines of this model and so I keep pressing forward. Slotting the fins and printing them separately is an option and if I upscale this, will be a necessity. I
To the model, I added 1mm cylinders to the bottom of the fins, in hopes that it would provide a positive anchor to the bed during the point where it's not yet attached to anything. My first test print with this config turned out great! My POS printer had a brain fart and seized up, so the print failed again, however, not before proving that this would work.
The other challenge was to design a seamless screw-in tail retainer. This took a few iterations but I was able to get the design in a "deconflicted" state. The next test print will include a sample from the aft of the fin can and the retainer. I "Believe" a 38mm motor will fit here, but I still have a bit of testing to do.
Here are some pics of the design.
Fusion 360 - Pitbull Fincan Design
Fincan with Standoff Supports
Fincan in Print Preview Mode
Detail of Trouble Area - Standoffs seem to have resolved this issue
However, the fincan has been giving me some trouble. I incorporated a boattail in the design with the cutouts on the trailing edge where the fins meet the tail cone. This leaves an area where there isn't a lot of support. I try to keep my supports from interfacing with the part as much as possible to make cleanup easier, but for this design, the practice has proven to be a failure. I love the lines of this model and so I keep pressing forward. Slotting the fins and printing them separately is an option and if I upscale this, will be a necessity. I
To the model, I added 1mm cylinders to the bottom of the fins, in hopes that it would provide a positive anchor to the bed during the point where it's not yet attached to anything. My first test print with this config turned out great! My POS printer had a brain fart and seized up, so the print failed again, however, not before proving that this would work.
The other challenge was to design a seamless screw-in tail retainer. This took a few iterations but I was able to get the design in a "deconflicted" state. The next test print will include a sample from the aft of the fin can and the retainer. I "Believe" a 38mm motor will fit here, but I still have a bit of testing to do.
Here are some pics of the design.
Fusion 360 - Pitbull Fincan Design
Fincan with Standoff Supports
Fincan in Print Preview Mode
Detail of Trouble Area - Standoffs seem to have resolved this issue
I printed a similar sized fincan in ABS and had a lot of issues with bed adhesion at the fin tips. Would proogressively curl up. I fixed that with some 25mm thin discs along the trailing edge onto the bed. Gave a lot more bonding and created isolated islands of bonding. If one started to pull off the bed, it didn't affect the others.
How hot is the retainer going to get.?
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Test print for a nose cone tracker bay. Trying to replace my old system with one that uses a switch through the side of the cone, so I don't have to pull and disassemble nose cone to turn on or off.
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Parts for bolt together 3" dual deploy rocket.
I ended up building a lattice of 2mm cylinders that interconnects the fins to help keep them in place. The test Print turned out good so I'll Print the can tomorrow. I'm putting the little one to sleep so no pics arm.
I honestly don't know how the retainer will hold up. I'm not set up for ASA or ABS so PETG is what I will test with. I borrowed the design from a smaller version on my BT60 Bullpup. That had no significant melties buy it was only tested on an E16. I have a batch of rockets that need building fir testing. This one might get flown in September.
