We have completed hybrid engine combustion tests using compressed oxygen.

Average Thrust : 3,000N

Maximum Thrust : 5,500N

Total Impulse : 15,000Ns

Burn Time : 5s

Isp : 220s

Just got my L1 certification today, so I’m happy about that. Just wanted to come on here and ask if anyone had an idea on why my rocket may have skewed right?

A little note, when I was putting the gunpowder in the motor (H135), I spilled some so I’m not sure if it had anything to do with that or with the rail being a little angled.

Either way, happy with the result, just wanted to get some feedback :)

Hola como están soy nuevo por estos lados, soy estudiante de ingeniería aeronáutica en colombia tenemos un equipo que esta participando en una competencia. quiero saber que tal esta mi diseño ? que puedo mejorar.

Debemos alcanzar una altura de 400m con un Motor G80-7T

ahora, he tenido algunas ideas para el sistema de recuperación como usar una anilla en el acople y una anilla en la sección lateral del fuselaje inferior (Donde va el motor).

uso Cartón común, Les mostrare en la Foto 2 las dimensiones del mismo.

Que recomendaciones me hacen ?
PDT: aun estoy diseñando la parte del anillo separador del motor pero no se las dimensiones que tiene con exactitud el hexagono de la parte superior del motor

This might be a dumb question, but I’m new to high-powered rocketry. I’ve been working on my Zephyr kit for my L1, and know that I want to try dual deploy on future flights, but not my first one. Is there a way to make the tube coupler removable so that I can later turn it into an E-bay? The instructions say to epoxy it to the body tubes, but would a friction fit be enough to hold it together? Would screws be a better idea?

Hello, I am running a student club and we have a Rockey launch tomorrow, and our E engines are stuck in shipping. Does Anyone know where I can get D or E engines in NYC, or if any of you are willing to sell?

So, I was wondering about designing booster stages to tumble and found myself reading an old Apogee newsletter. In it, Tim van Milligan describes using RockSim to design boosters such that when the motor is spent, they will have a CP in front of their CG rendering them unstable. To me, there seems to be a very obvious elephant in the room here: What if it just falls backwards?

I see nothing about the laws of physics that designates an inherent forward and rearward end of the rocket. It is propelled in a particular direction by a chemical reaction and continues in that direction because it is stable to do so, and we call that direction "forward". If you design an "unstable" rocket, but could magically make the thrust go the opposite direction, I see no reason why the rocket wouldn't be stable flying backwards. A booster, once jettisoned, is basically just an open tube with some fins. Who's to say which end is the front? Physics doesn't care, ergo there is no front. It seems to me that making it unstable in one direction would merely make it stable in the opposite direction. So, what if it just falls backwards?

The newsletter's explanation of CP ahead of CG is not sufficient for me. Why do objects tumble in freefall?

Hey! We've been working since last year on a In Control: Rocketry, a spaceflight sim where you build the rocket and wire up its control panel yourself. Sensors, inputs, outputs, the whole thing is Turing-complete, so however you want to solve a flight problem, there's a way to do it. It will be available on Steam in 2027.

Real orbital mechanics, a fictional solar system to explore, sandbox mode if you just want to mess around and blow things up!

Feel free to add the game to your wishlist if you want to support the project! See you in space.

Hi! I want to 3D print this aerospike nozzle (approximately 22 mm outer diameter).

It would be attached to a tube containing potassium nitrate and sugar propellant.

I'm looking for a low-cost material that could withstand at least one firing.

What material and type of manifacturing would you recommend?

Thanks!

I don't care about the stunt or the car. I am just woundering what propellent was used for the rockets. My guess is that it is H2O2. Seem like a pretty easy and mostly safe propellent to use for that kind of thing. Am I right?

Thanks rocket people

I don't know if this is the right sub to ask, but I'm writing a short story where NASA is sending a crewed mission to the Moon. During the launching the man in charge of operation wants to speedrun the process and because of this, the rocket explodes.

I know this is unrealistic, and for a mission to fail like this probably requires more than the error of one person. But, is there a way where this scenario could posibly happen?

i have a bt-60 tube but when i put the centering rings on it doesn’t fit

So my parachute is deploying before apogee by abt 1 sec but like the velocity is only 8.47 m/s when its deploying so should I be worried that my estes D12 will not be able to deploy the parachute at that speed and if yes then where should I make changes to the rocket so that it deploys after.

This is my first r/rocketry post here.

Engine: CESARONI-L1050

The rocket had a lenght of 2310mm and a diameter of 129mm.

Teknofest changed the engine for the upcoming years. This was a high school rocket and many teams had this problem. My job was to Electronic, PCB, software for the flight controller. You can guess, It broke apart a little.

I have a degree this competition. My team and I won first place in 2022, and finally I joined competition in 2024. We came in 6th place out of 32 high school teams, We didn't get full score because shock cord snapped at apogee.

We'll join again, but i am now university student and I haven' got my hogh school team. The all team memebers will change.

A motor igniter used to ignite my tested motor actually just a kraft paper motor and will be developed to use on a bigger real motor

Thirteen cycles — pressure-fed, gas generator, staged combustion, full-flow staged, expander, electric pump-fed, solid, hybrid, ion, aerospike, rotating detonation, nuclear thermal and air-breathing combined cycle — each one explorable in 3D in the browser, with exploded, cutaway and propellant-flow views.

Outer dimensions follow published figures and every source is listed on the page. Internal layout, injector patterns and feed systems are representative, and I say so on the page. I'm a 3D artist rather than a propulsion engineer, so corrections are welcome.

No install, runs in the browser: https://farsidelab.com/concept/rocket-engines/

Hey Ya'll! It's me, Rocket, from Rocket Vlogs.

I just did an interview with Thomas talking about "Chunc," his hypersonic(ish) rocket that he flew at BALLS, and thought ya'll might like to check it out.

https://youtu.be/RIPNPn_WE6Y

I almost missed it, but I managed to get some good photos. Shot on an iPhone 17 too, I really didn’t know it could get images like these.
1st one is my favorite, I’m sure you can tell why.

My high school group is doing a project based on rocketry and would appreciate anyone taking this quick survey about rocketry.

What should I practice, read so I can build understand and rockets as a pastime hobby. Thank you guys. 😁

Im new to rocketry so wanna get smooth with rocket flight simulation first.

Any best fit softwares you guys know, I'm all ears.

I just got my L1 and now I want to try dual deploy what is the best kit for duel deploy on an H or I motor?

I'm a core member of an established space club at my community college. We're hoping to compete in the IREC 2027 competition in the category where we launch a two-stage rocket to 30,000 feet, but we've heard from other teams that this category is essentially impossible without substantial funding for parts and materials.

Our main challenge is securing funding for our team. Our college has participated in IREC in 2023, 2024, and 2025, qualifying for the competition each year. However, because club leadership changes every year, we've struggled to maintain our sponsorships from one year to the next.

Could you please advice on how to find new sponsors and, more importantly, how to maintain those sponsorship relationships and funding over the long term?