motor

Hi! I've been putting together a simulation for a rocket in RocketPy, however it needs the following Rocket motor parameters: dry inertia, nozzle radius, grain number, grain density, grain outer radius, grain initial inner radius, grain initial height, grain...

Hi everyone, I'm Bhadrinathan, an undergrad student at the National Institute of Technology, Trichy (NIT Trichy), India, and I’m excited to announce that we are forming a new rocketry club. NIT Trichy is one of the premier engineering institutes in India, known for its rigorous academic...

I'm helping a friend replace a nozzle lost during a cross-country move. Does anyone have the dimensions of the CTI N2501 nozzle? I assume it's close to one of the two larger AT nozzles pictured here.

LARGE selection of older ISP/AT reloads and accessories available HYBRID hardware, components, and reloads RMS Hardware Delivery to AirFest XXX (2024) on Sunday (unless the rain sticks around, we’re hoping to drive up Saturday evening) Delivery in North Texas or meet you within reason Buy...

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In 2022, I bought a Pro38 I540 advertised as an I540-16A White Thunder. I'm silly for just noticing this now, but the packaging I received says it's an I540-15A White Thunder. The QR code instructions point me to instructions that list 15 seconds as the maximum delay time: But my packaging...

Hi, I recently found this 3D printed Sentinel model, which I printed upscaled to a BT-55 size. I weighed the entire thing and it comes out to 4.7oz (133g). I'm wondering if I could go with a D-12 motor, or if I'd be better off with an E-12 motor? Any thoughts? I can share more info if needed.

Does anyone know of any stores in Virginia that sell HPR motors? I am striking out everywhere I call and wondering if anyone knows of any. Thank you!

Hi All - Happy Holidays!!! It has been years since my last visit here, but I thought I would take a shot and see if anyone could help me out. I have a project I'm working on that would have use of SPENT MMX motor casings. Nozzle in, nozzle out, not a real problem, but definitely the later ones...

Hi everyone, we are new students that are new to rocketry but attempting the American Rocketry Challenge. We've designed our rocket but can't decide on the size on our engine mount. We've simulated the rocket design but everyone says you can't trust it until you fly it and adjust the drag in...

Getting rid of some hardware I'm not using right now. For sale is a 98m 6 grain Cesaroni case, a 98 mm 2 grain case, a 98m set of closures and a 98 mm spacer. The 2 grain case and closures have flown a couple times and I bought them in 2011. The 6 grain case and spacer have never been flown as...

I'm currently gearing up to build my L2 around a CTI K1200WT, currently simming around 11k and Mach 1.25. Realistically, I'm going to fly it on a J140 or something low and slow first so I can actually get certified, but afterward I'd send it on the big boy. I could buy a fresh K1200, but one of...

I have a complete set of 10 - 75 mm research snap ring casings. The longest casing measures 35” the shortest casing measures 14.5”. It also includes a case of nozzles, closures and snap rings. I never was able to get into research motors. With my time constraints buying motors is better for me...

So maybe this a problem no one besides myself needs solved but in all my years of rocketry I didn't think to do this until now. My dad was old school and wouldn't fly a design unless it passed a swing test and with very few exceptions I inherited this part of the hobby from him. (Yeah, I know...

What diameter rockets and motors do you prefer or fly most often? Choose what comes closest from the available choices. Select all that apply. Feel free to explain and add other preferences (e.g., cardboard vs fiberglass, DMS vs RMS, single vs dual deploy, etc) in your post.

Anyone have an Aerotech, Dr. Rockets, Rouse-tech, Monster Motor Works 75/3840 Motor compete with Forward and Aft Closures and seal disk? let me know if you have one in great shape. Thanks Gary T.

Hello, me and my team are preparing for a rocket competition. We were given 2 engine options for us to use in our rocket. First choice is M2150 and second choice is M2020. We have to draw rockets in for 2 options. No problem for M2150. But the dimensions of the M2020 are incorrectly given in...

Hi, I am building a thrust vectoring rocket that has a long duration of burn time. Can anyone provide me an alternative for Aerotech G8 or G11 motor since they are no longer on stock anywhere. Thanks!

I have been wondering about the length of motors vs the length of the motor tube,e question being can you fly a motor that it shorter than the tube in it? e.g. Estes 24mm motors have 2 sizes, the D12 being 7cm long and the E12 being 95mm long. If I had a motor mount with 96mm between the engine...

Hi, First, best wishes for the new year. Today I publish a new version of METEOR. You can now use many different grains configuration (hollow cylinder, finocyl, star and end burner). Let me remind you that: you can also use your own propellant. export the motor result in RASP format (to use...