3D Printing Has anyone modeled a Scud nose cone?

[Zyzzyva1000]

Just curious, I was looking into trying to build a clone of the old estes Scud kit. There's a guy on shape ways selling for $65, but that seems a bit ridiculous. Unfortunately I have yet to figure out how to model nosecones well. The rest of the kit has been scanned on space modeling (https://www.spacemodeling.org/jimz/est1340.htm) and so shouldn't be hard to cut some fins and the trim pieces, and stickershock23 has the decals.

If anyone has a model, or something similar, would be appreciated. Ideally something in 2 pieces since I am a bit limited with my smallish (15cm^3) print bed

 

[cwbullet]

Just curious, I was looking into trying to build a clone of the old estes Scud kit. There's a guy on shape ways selling for $65, but that seems a bit ridiculous. Unfortunately I have yet to figure out how to model nosecones well. The rest of the kit has been scanned on space modeling (https://www.spacemodeling.org/jimz/est1340.htm) and so shouldn't be hard to cut some fins and the trim pieces, and stickershock23 has the decals.

If anyone has a model, or something similar, would be appreciated. Ideally something in 2 pieces since I am a bit limited with my smallish (15cm^3) print bed

If you have a rocksim. I have a nose cone.

 

[Zyzzyva1000]

I don't have a rocsim, I can try to make one later though. Do you model based on the rocksim?

 

[cwbullet]

https://www.rocketreviews.com/aardvark-rockets-al-hussein-scud-4027.html
Close enough?

 

[kjohnson]

https://www.rocketreviews.com/aardvark-rockets-al-hussein-scud-4027.html
Close enough?

Same cone used on the D.A.R.T. and MACH-2 and JimZ has this semi-helpful drawing https://www.spacemodeling.org/jimz/estes/est1379j.png

kj

 

[Bravo52]

Just curious, I was looking into trying to build a clone of the old estes Scud kit. There's a guy on shape ways selling for $65, but that seems a bit ridiculous. Unfortunately I have yet to figure out how to model nosecones well. The rest of the kit has been scanned on space modeling (https://www.spacemodeling.org/jimz/est1340.htm) and so shouldn't be hard to cut some fins and the trim pieces, and stickershock23 has the decals.

If anyone has a model, or something similar, would be appreciated. Ideally something in 2 pieces since I am a bit limited with my smallish (15cm^3) print bed

If you are looking for an STL, seems easy enough in F360. If you have a day or two, I'll knock one out and post it...

 

[Bravo52]

Ok, this was quicker than I thought.... try this. The dimensions are for a BT-60 and the features are a best guess in terms of panel lines. The detail will depend on how you plan to print. Give it a try and let me know what needs adjusting.

 

[cwbullet]

Ok, this was quicker than I thought.... try this. The dimensions are for a BT-60 and the features are a best guess in terms of panel lines. The detail will depend on how you plan to print. Give it a try and let me know what needs adjusting.
View attachment 612742

Thanks. I would have done it later.

 

[Zyzzyva1000]

Ok, this was quicker than I thought.... try this. The dimensions are for a BT-60 and the features are a best guess in terms of panel lines. The detail will depend on how you plan to print. Give it a try and let me know what needs adjusting.
View attachment 612742

Damn that was quick and looks great. Now I just need to figure out how to cut it to print it or finally break down and get a printer with a larger z axis dimension. Thanks!!

 

[ShadowSpire48]

Damn that was quick and looks great. Now I just need to figure out how to cut it to print it or finally break down and get a printer with a larger z axis dimension. Thanks!!

How tall is that STL? A BT60 nose cone should easily fit on something like an Ender 3

 

[Zyzzyva1000]

How tall is that STL? A BT60 nose cone should easily fit on something like an Ender 3

It's just under 200 mm. Sadly with my adventurer 3 I am limited to 150x150x150. I have gotten it setup to be able to print ABS and ASA well, but sadly am limited on size. Waiting to upgrade to something larger than can do higher temp filaments too

 

[Bravo52]

It's just under 200 mm. Sadly with my adventurer 3 I am limited to 150x150x150. I have gotten it setup to be able to print ABS and ASA well, but sadly am limited on size. Waiting to upgrade to something larger than can do higher temp filaments too

What slicer are you using? You should be able to cut it with the slicer. However, here is another version I cleaned up and split for you. You'll need to print the lower section upside down.

 

[Zyzzyva1000]

What slicer are you using? You should be able to cut it with the slicer. However, here is another version I cleaned up and split for you. You'll need to print the lower section upside down.

Sorry, should have been more specific. I can cut it in half with my slicer (it then generates a flat surface as the cut edge. What I am trying to figure out how to do is add tabs that allow you to glue them together with more strength (I have an openscad nosecone generator I usually use that allows you to specify printer dimension limitations and then generates pieces with tabs). For something like this though I could just manually glue some scraps across, or use what my slicer generates (which would be 2 flat surfaces the diameter of the nosecone). For low power that should work. The nosecone is awesome, thanks!

Since space modeling has a scan of the fins I can just input that into Cricut and use my machine to score some balsa and finish with a knife. Looks like this is coming together. Thank you again!

 

[Bravo52]

Sorry, should have been more specific. I can cut it in half with my slicer (it then generates a flat surface as the cut edge. What I am trying to figure out how to do is add tabs that allow you to glue them together with more strength (I have an openscad nosecone generator I usually use that allows you to specify printer dimension limitations and then generates pieces with tabs). For something like this though I could just manually glue some scraps across, or use what my slicer generates (which would be 2 flat surfaces the diameter of the nosecone). For low power that should work. The nosecone is awesome, thanks!

Since space modeling has a scan of the fins I can just input that into Cricut and use my machine to score some balsa and finish with a knife. Looks like this is coming together. Thank you again!

Look closer...there is a lip built into the upper half...

 

[Zyzzyva1000]

Look closer...there is a lip built into the upper half...

D’oh. That’s what I get for just previewing it. Will print this asap then. You are truly awesome!

 

[Bravo52]

D’oh. That’s what I get for just previewing it. Will print this asap then. You are truly awesome!

There is likely to be some adjustments that need to be made. I'm not sure how the grooves and panel lines will look when printed. Let me know what needs to be done and I can fix it up pretty quickly. Also check the slip fit of the nose cone to the BT...it might be tight...or loose.

 

[Zyzzyva1000]

There is likely to be some adjustments that need to be made. I'm not sure how the grooves and panel lines will look when printed. Let me know what needs to be done and I can fix it up pretty quickly. Also check the slip fit of the nose cone to the BT...it might be tight...or loose.

So I got the bottom portion printed (wanted to make sure it was workable). Tiny bit loose on estes BT 60 tube (but honestly will just paint it with some epoxy or high fill primer + some tape as needed). The panel lines didn't really print. Maybe it's a resolution issue - 0.2 layer and a 0.6 nozzle. The groove lines printed fine. Will print the top portion tomorrow but honestly this model is great!

 

[Zyzzyva1000]

So not the best pic but printed the rest and it came out nicely. Needs a little sanding and a couple spots of filler (I forgot to slow the print near the tip). Whatever of the panels didn’t come out will just be dealt with using decals. Love the cricut that my wife never uses. Oh and it glued together fine. Could have made ABS slurry glue but I was lazy and used CA and it seems more than sturdy. Turns out 2 wraps of tape was all it needed to fit the bt60. Awesome model, thank you!

 

[cwbullet]

So not the best pic but printed the rest and it came out nicely. Needs a little sanding and a couple spots of filler (I forgot to slow the print near the tip). Whatever of the panels didn’t come out will just be dealt with using decals. Love the cricut that my wife never uses. Oh and it glued together fine. Could have made ABS slurry glue but I was lazy and used CA and it seems more than sturdy. Turns out 2 wraps of tape was all it needed to fit the bt60. Awesome model, thank you!

Tape is a common need to adapt for shrinkage.

 

[Zyzzyva1000]

Tape is a common need to adapt for shrinkage.

Of course, and this was ABS so possibly more shrinkage. What I was trying to convey there was how spot on Bravo52's model is. I initially thought it was looser, but I guess I was bad at estimating on a small nosecone like this. Would always rather wrap a little tape than try and sand down a nosecone shoulder that's too big.

 

[Bravo52]

I changed a few things on the lower portion of the NC that might make it easier to print. I increased the size of the detail and made both raised and recessed versions.

 

[Zyzzyva1000]

Haven’t had a chance to try the updated version. May do that with a version 2. Still like the nosecone and how it looks (has some interest not just being smooth). I just recreated the Estes model for the fins and then did some detail and paint work based on another thread of a 4 inch model on here. Kept it simple (there are decals available to recreate the Estes version but it’s quite busy). Just needs some matte clear coat now. I put a 24 mm motor mount in too so I have more options. Hope I can launch this weekend.

 

[Zyzzyva1000]

Final followup on this, it flew great, and everyone at my club loved it. Cool to be able to recreate a kit that's been OOP since before I was born with 3D printing and some help from @Bravo52

 

[Jeff Curtis]

I'd love to have one of these. What would it cost to print one? I priced it on Xometry and it was $70.