Launchable ESSM Model Rocket, 18mm A,B,C motors - Free 3D Print Model

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Carini'sLumpyHead

Education>Engineering

IP Report

Print Profile(1)

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P1P

X2D

X1E

H2D Pro

P1S

H2C

X1 Carbon

H2S

H2D

P2S

A2L

0.2mm layer, 2 walls, 100% infill

Designer

5.4 h

3 plates

5.0(2)

Open in Bambu Studio

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309

Released

Description

Disclaimer

This project, including all 3D models, documentation, and associated information, is provided for informational and educational purposes only. It represents an experimental design and has not been certified, tested, or verified for safety, reliability, or compliance with any standards.

Building, modifying, or operating model rockets involves significant risks, including but not limited to property damage, personal injury, or death. This project is intended for experienced users only.

By using these files or any related information, you acknowledge and agree that you do so entirely at your own risk. The author makes no warranties, express or implied, and assumes no responsibility or liability for any damage, injury, loss, legal consequences, or other issues arising from the use, misuse, construction, modification, or operation of this design.

Users are solely responsible for ensuring that any use of this project complies with all applicable laws, regulations, and safety guidelines in their jurisdiction.

UPDATE: Ran a more accurate simulation, OG model was over-stable due to larger diamater midsection (updated RockSim screenshot). May result in weathercocking. Updated fill in nosecone should alleviate issue (18MAY26). Please re-print and replace nosecone if planning on launching. Optimized for B6-x

Launchable model rocket, based on the RIM-162 Evolved SeaSparrow Missile (ESSM).
Fits Estes 18mm rocket motors (A,B,C).

Approx. 489ft on a B6 motor, 1115ft on a C6

DO NOT CHANGE INFILL. 100% INFILL REQUIRED TO MAINTAIN CP/CG AND FLIGHT STABILITY

See assembly guide below

Documentation (1)

Assembly Guide (1)

Rocket assm instructions ESSM.pdf

Comment & Rating (13)

@Firebro1684

not that controlled looks good tho

The designer has replied

@Lumpy_Head

Launched it twice, and on the second one (b6) is was slightly windy and it definitely turned right off the rail. Which is odd, as it simulated with pretty good stability margin. Might need to double-check that

@Firebro1684

Replying to @Lumpy_Head :

won’t let me rate but I would put 4 stars

@Lumpy_Head

So, took me a bit, but re-ran the sim. Admittedly, I was a bit lazy on the first one, I didn't think the slight change in diameter on such a small rocket would make a difference but it kinda does. The new sim takes into account the larger (by 2mm) diameter midsection, which pushes it slightly over-stable. If there's any wind at all, it'll turn directly into it. I saw that myself last time I launched it; and that's probably what you saw. I have reduced the infill in the nosecone to account for it, gonna publish in a sec. Going to optimize for a B-motor; that way it's in the middle and works for A's and C's too.

@Tommy_Prints

I would like to print my own rockets using OpenRocket, would you happen to know the best export method and workflow?

The designer has replied

@Lumpy_Head

I am not aware of a method to transfer CAD/3d models to/from OpenRocket. Not saying it doesn't exist, but I don't know of one. Workflow depends on what you want to make. Since I was making models that look like existing missiles/rockets, I designed in CAD and then input those dimensions, materials, etc into OR, and then made adjustments to help stability. If you are not trying to emulate a real-world rocket, it's probably better to start in OR, design for stability, and then re-create in 3d

@Tommy_Prints

Replying to @Lumpy_Head :

There IS a way to export the certain features, such as nose cone and body, from OpenRocket into a slicer. The files export in .obj format. However I was not sure if this was the best method or whether or not it would function/attach properly, so I thank you for your advice!

@user_1563058169

Print Profile

0.2mm layer, 2 walls, 100% infill

The back fins tube is a little bit smaller than the main tube. I had to scale it up. but besides that everything was pretty good!!!

(Edited)

The profile uploader has replied

@Lumpy_Head

The motor tube goes inside the body tube

@user_1563058169

Replying to @Lumpy_Head :

oooohh that helps. thank you!!!

@user_3385499148

can you please make a a1mini version please

@Panda124

Print Profile

0.2mm layer, 2 walls, 100% infill

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License

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You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.