The Rocketry Forum

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  1. EggbertTheAstronaut

    Cold Gas Thruster

    Hello! I am designing a cold gas thruster for a project that will use either N2 or air and I'm having trouble figuring out what my chamber temperature would be. I understand in this case it would be the temperature of the gas before entering the nozzle but I'm not sure if that would just be...
  2. S

    Using Side Thrusters on a missile to create an angular acceleration

    Assume a rocket is standing on the ground with mass = 1000 kg, and near the top of rocket we apply a force of 100 N for say 1 sec,now assume that this is sufficient to tip rocket over/start tipping over. If the rocket is mid air and accelerating at 30m/s^2, then likewise how much force would be...
  3. C

    Vibration Data of Sounding Rockets

    Hi, Can Someone provide me with vibration data of the propulsion system of an actual sounding rocket
  4. M

    Which is a better method of propulsion? Ion engine or ablative laser propulsion?

    Ablative laser propulsion seems like a good bet because it works in both atmosphere and a vacuum and just seems better than Ion engines.
  5. M

    Ion engines in Star Wars don’t work. Alternative?

    I am a lifelong Star Wars fan and I was heartbroken to discover that ion engines could NOT work both in the atmosphere of a planet and space; which is the bread and butter depiction of Star Wars. I have to assume that in the Star Wars universe; somehow, someway scientists figured out how to make...
  6. Q

    Help the growing passion for rockets in Costa Rica

    Hello everybody I belong to a group of students currently undergoing our studies in Mechanical Engineering, Civil Engineering and Electrical Engineering at the University of Costa Rica. We have been involved with Aerospace activities as active members of the Aerospace Engineering Group (GIA)...
  7. Lukun7

    Pro150 motor andd Other O motor question

    On thrustcurve motor browser, I've noticed that the contrail and Gorilla Os are 152mm, and Cesaroni reloads are 161mm. Are these motors really the same diameter? And if not, which MMT size is used more and easier to find?
  8. Jacob Ritzke

    Q-jet angled cap

    Hello, this is first post here so sorry if it's in the wrong place. I recently got 2 new q-jets, I've been using them for a while, but I noticed one of them has it's ejection cap "bent" to the side of the bulkhead (see pic). The black material on isn't any black powder, it's some ink from a pen...
  9. wyattjohnson35

    Rules that Prohibit Propulsive Landing of Rocket or Lander?

    So I am competing in the Battle of the Rockets 2019 competition, and although propulsive landings aren't allowed, I did the math and really want to build a test bed just to get the experience and learn a bit about this subject. I've seen model rockets do propulsive landings in the past with...
  10. J

    38/720 casing question

    Hi all, I'm currently working in a final degree project and I'm designing a nozzle for our university rocket. As it is close of power to the I600R engine I would like to use its casing for my nozzle. My idea is to make the nozzle metalic and screw it in the casing. The problem is the follwing...
  11. J

    Propellant composition

    Hi all, I'm an student doing its final degree project in aerospace engineering. My project is to design a nozzle for the rocket that we do in our university, I have been gathering information but I can't seem to find the following: Regarding Aerotech engines: - Which composition is the Redline...