Co2 rocket/grenade launcher by YeetYeet

YeetYeet

Tools>Gadgets

Print Profile(1)

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X1 Carbon

P1S

P1P

X1E

Launcher with 190mm barrel and shell 0.5

12.5 h

1 plate

4.9(13)

Boost

559

951

788

304

Released

Description

Break action rocket launcher that shoots rockets propelled by co2 cartridges. Rockets are held in reusable shells and upon firing, they deploy stabilization fins thanks to rubber bands.

The rockets use 12g co2 cartridges which are often used for airsoft. That makes them quite affordable and available in any airsoft store.
Launcher features picatinny rails on top and bottom of the barrel, making it possible to mount accessories like scope or laser.

For more information and assembly guide see assembly.pdf in files.

BOM:

M3x8 7pcs
M3x60 2pcs
M3x35 2pcs
M3x25 1pc
M3x22 1pc
M4x25 1pc
M4x22 1pc
M4x10 4pcs
M4 nut
Springs 5,5mm OD, length at least 30mm (Springs from HORNBACH)
Torsion spring - wire diameter: ~2.5mm, inner hole diameter: 8mm, outer diameter: 13.5mm, height: ~13mm (I got mine from this clamp)
Nail 2.8mm x 40 (HORNBACH link)
12gram non threaded co2 cartridges
rubber bands

For additional types of rockets or if you want to create your own see
Co2 rockets (Makerworld link)

In the files section you can find honing tool. This is not needed but can be used to smoothen the inside of the barrel. Simply glue sandpaper to it and insert 8mm tube into the center. Mount it onto a drill and use it to smoothen the barrel.

UPDATE: Added shorter 167mm barrel so it can be printed on prusa mini or A1 mini.

Thanks to @Ice_Maniac, who found the correct set of springs and clamps on amazon:
Clamps from amazon
Springs from amazon

Documentation (1)

Assembly Guide (1)

assembly_7b990773-1ac0-4d14-bef6-2154c588b98f.pdf

Comment & Rating (55)

@cchief144

Has anyone else had issues with really rough looking rocket fins? Every other part printed flawlessly. Supports came off clean and easy. I print two rockets and they come out looking great except for the fins. it’s like a sloppy layer shift. So, I print two more and same thing. Being tall, skinny, and print in place I figured they moved during the print but once it reaches the top portion of the fin it prints as it should. Idk what’s going on.

(Edited)

The designer has replied

@YeetYeet

You could try lowering the hotend temperature and increase cooling. It looks like the corners of the layers on fins are lifting which causes the nozzle to bump into it when printing the next layer. This causes movement of the fin resulting in uneven printing.

@cchief144

Replying to @YeetYeet :

I’ll give that a try, thanks.

(Edited)

@cchief144

Replying to @YeetYeet :

So I tried your suggestions with no luck unfortunately. I even tried to print them on one of my ender 3 pros and it was just as bad. I got some to fit inside the shells so hopefully they work but they sure don’t look good. Maybe I’ll try different supports or paint supports on in a couple spots to try to hold them still. I wish I knew what everyone else is doing to get them to print clean. Maybe it’s my filament?🤷🏼‍♂️

@Trinko3D

Could you make a version smaller than 180 mm to fit the A1 mini and Prusa mini?

The designer has replied

@YeetYeet

I will look into that later this week.

@YeetYeet

I added 167mm barrel. The picatinny rails aren't ideal. I will get back to fixing them someday.

@Trinko3D

Replying to @YeetYeet :

thanks

@Ice_Maniac

What a fantastic model! The engineering is really fantastic! I printed this over the course of a couple days, ordered all the hardware (bolts) from a local engineering supplies place, the clamps for the hammer spring are readily available on Amazon - the trigger, barrel catch and firing pin springs are all available from Amazon for a few quid for 10. I wish I could design something like this, it’s a true example of what these printers, and someone who is good with CAD software are capable of. The operation is very smooth and well thought out.

The designer has replied

@Lee1255

Any chance you can send me the links to the amazon parts you used ? I am looking forward to making this one 😀

@YeetYeet

Thank you. Could you post the amazon links for the parts here ? I will add them to the model description.

@Levikulper9

Can I use pen springs?

The designer has replied

@YeetYeet

Pen springs could possibly work for the trigger return and for the nail return. But i think the are too weak.

@Levikulper9

Ok 👌

@billde_cat

These look to be similar but are possibly slightly smaller? Assuming the measurements and my conversion are correct. Any thoughts on if these would work since the links here are for the UK https://a.co/d/eWYkzXH

(Edited)

The designer has replied

@YeetYeet

Based on the picture, it looks like it could work. But its hard to tell without testing it.

@satoshi2024

Print Profile

Launcher with 190mm barrel and shell 0.5

Fun , but my rockets just fly everywhere ..

@YeetYeet

Try looking at the hole left in the co2 cartridge after firing. If it's not centered, then the rockets will be flying randomly because of uneven thrust. Not centered hole could be caused by bent nail or some other misalignment.

@jessemddltn

Print Profile

Launcher with 190mm barrel and shell 0.5

can't find a spring in the US for the hammer yet

@user_2616327165

have you been able to find a spring for the hammer yet?

@Joelski

i cant find x22mm bolts can i sub in x20mm bolts instead?

The designer has replied

@YeetYeet

Yeah probably.

@Poldion

Are the fins angled so there is an rotational force stabilizing the Rocket?

The designer has replied

@YeetYeet

No. Wanted to try that but I never got the time to model the angled fins. That's why I also added .step files for the rockets, so that others can try to model better rockets.