Rocket Definition and 1000 Threads

Space X wants to build such a reusable rocket: Why don't they instead use a foldable rotor and land the thing with autorotation? I mean it wouldn't take any fuel.

Homework Statement You're at a mission control for a rocket launch, deiciding whether to let the launch proceed. A band of clouds 5.3km thick extends upwards from 1.9km altitude. The rocket will accelerate at 4.6ms^-2 and it isn't allowed to be out of sight for more than 30s. Should the...

Homework Statement Consider a rocket in space that ejects burned fuel at a speed of v_ex= 2.0 km/s with respect to the rocket. The rocket burns 10 % of its mass in 340 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 170.0 s? (suppose...

I thought this would be a cool kind of topic to put up for discussion. 1)How realistic would a moon base be for mining and production of metals. 2)How realistic would the moon be for a Rocket launch area don't know how to word that. Anyways since the moon has practically no gravity we could...

Homework Statement [SIZE="3"]A rocket has an initial mass of m[SIZE="1"]0 = 30,000 Kg, from which 80% is fuel. The fuel is being burned at a rate of R = 200 kg/s and the gas is expelled with a velocity of v[SIZE="1"]rel = 1.8 km/s. The velocity of the rocket is calculated by: [SIZE="4"]v...

Homework Statement A rocket which has an exhaust speed of 8.0 km/s is to have a vertical acceleration of 8.0 m/s2. If the initial mass of the rocket is 6.0x106 kg, at what minimum rate must the rocket consume fuel? Homework Equations F = ma F = RVREL The Attempt at a Solution F...

I want to kindly ask about opinion what will be if : a) rocket's speed < gravitation b) rocket's speed > gravitation ************************************************************ Earth ----- Rocket[W]m >>> constant V [W]- scale can measure kg [m]- person mass Scale is showing Qearth +...

So suppose an astronaut in interstellar space has gas ejecting from her propulsion system. So the gas would cause her to move forward by some distance, d. Then, the F_{thrust} acting on her must be constant (assuming the amount of gas ejected per unit time is constant, and the speed it is...

I've recently learned about the "Tsiolkovsky rocket equation" which can be used to relate initial mass, final mass, rate of fuel change, velocity change, etc.. Except I'm having difficulty applying it to Power. How do you find the instantaneous Power of the engine, fuel, and the total power...

I am sorry for the wall of text but i need some help with a problem in one of my classes. i am still in my semester as an engineer and this problem was given in my college acclimation class (i know it is ridiculous). One fundamental problem in manned space travel is that the enormous...

So, as I pet project I'm designing things, and I've come across an issue: I'm trying to design propellant tanks and such for a vehicle, so I need to find the mix ratio of the propellants. In this case, it's Liquid Oxygen and Methane. CH4 + 2O2 → CO2 + 2H2O Using atomic masses and such, it...

Homework Statement A rocket explodes into two fragments with the following information: Initial trajectory: 150 m/s in the x-direction, mass is 40kg Portion a, post explosion: 45 degree angle above the horizontal, 25kg Portion b, post explosion: 30 degree angle below the horizontal...

background information is that I have been working on code for a rocket launch to the ISS and I have gotten it close. The problem is when calculating the Force of drag, the problem occurs with it. As entering space, and for this "model" were going to say that temperature is 0 K in space or...

Homework Statement A rocket in outer space has a payload of 4050.0 kg and 1.753·105 kg of fuel. The rocket can expel propellant at a speed of 4.300 km/s. Assume that the rocket starts from rest, accelerates to its final velocity, and then begins its trip. How long will it take the rocket to...

Hi, I really need clarification for this problem. Homework Statement A rocket with initial mass M0 is accelerated by expulsion of a partial mass dm of its mass m with a constant velocity u. Write down the differential equation corresponding to the conservation law of momentum for the...

I had an interesting idea for increasing the Specific Impulse and Thrust of a nuclear rocket engine; it's probably not practical - best case scenario 20% increase in exhaust velocity, with proportional increase in thrust, at the cost of 1.5x to 2x weight increase, and likely much lower - but I...

A model rocket is constructed with a motor that can provide a total impulse of 27.5 N · s. The mass of the rocket is 0.173 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance. i know that the equation is p=mv (vector...

Homework Statement Consider a rocket traveling in a straight line subject to an external force Fext acting along the same line. a) Show that the equation of motion is m\dot{v}=-\dot{m}v_{ex} + F^{ext} (1) b) Specialize to the case of a rocket taking off vertically (from rest) in a...

Hey everyone. I was hoping I could get some assistance locating some material to research on the launch of the Saturn V rocket. I'm doing my honors project for calculus 1 on rocket launches, and I'm going to be focusing on the Saturn V. I'm going to do an in depth analysis on the forces...

Homework Statement OK, this seems simple but I want to make sure I am not doing something totally wrong. The problem says: use the conservation of mass of a system of many particles to shoe that the thrust force of a rocket that ejects mass at rate \frac{dm}{dt} is equal to F=-v_e...

Hello, I am trying to understand the Tsiolkovsky rocket equation. I am looking at this right now: http://www.math24.net/rocket-motion.html they said that the momentum of the rocket itself is: p1 = (m-dm)(v+dv) and the momentum of the gas was: p2 = dm(v-u) Here is the problem- u is...

Before I ask the question, just want to say hi to everyone and introduce myself. Name's Derrick and I'm a sophomore engineering physics major at WPI. I'm currently in an Intermediate Mechanics course. Onto the problem: Homework Statement A rocket in free space that starts at rest with...

Kinematics question -- Rocket launch Homework Statement A rocket starts from rest and moves upward from the surface of the earth. For the first 10s of its motion, the vertical acceleration of the rocket is given by ay=(2.70m/s3)t, where the +y-direction is upward. A.What is the height of the...

Question, If I make a rocket engine using KNO3 fuel and bentonite clay for the nozzle, shouldn't the ISP of the engine be slightly higher due to the radiation? It would be nearly Immeasurable but nevertheless there. Kind of like the way a NERVA engine works.

A model rocket is fired upward. The rocket's average initial acceleration is 44.5 m/s2 until the fuel burns out in 0.835 s. How high does the rocket go? Ignore the effects of air friction. I was thinking about using the equation x=x(initial)+V(initial)*t+1/2at^2

Hello forum members and thank you for letting me post. My question refers to how rocket thrust works in a vacuum. I know this question has been posted before, but I am still confused about how it works. My understanding is that rockets do not move by pushing against air but move by pushing...

This is a problem I have never really understood. If a rocket engine is fired in a vacuum, does it exert the same force regardless of its velocity? If so, I don't know how to get around the following issue. Say that the chemical energy stored in a particular rocket engine is 100 Joules (I am...

If I were to take a model rocket and secure it upside down to a kg scale, what would I be reading on the scale's display? I would assume it would be the thrust of the rocket but are there other factors at play here? If it is the thrust of the rocket, how would I convert the said value to Newtons?

Homework Statement You must determine the acceleration of a rocket so that its equipment can be designed to survive. The rocket will have a burn time of t = 30 seconds, during which time it flies has a constant acceleration a. Call this Phase 1. After the fuel is exhausted the rocket enters...

Dear visionary inventors, megalomaniac engineers and audacious explorers, Chemical rocket engines aren't up to our desire to hop in the Solar system: go quickly to Mars, deviate Earth-threatening objects, and so many more missions. We need a higher ejection speed to save propellant mass, but...

This is a basic question regarding Lorentz transformations. Let's say we have two observers - S on Earth and S' which we put on a rocket headed for Alpha Centauri (A.C) =). If i choose 2 events like this: rocket leaves Earth rocket arrives on A.C These two events clearly do not...

The danish rocket group Copenhagen Suborbitals are scheduled to perform a sea launch of their first guided rocket, the 5.3 m long http://www.copenhagensuborbitals.com/contentgfx/Sapphire_specs.pdf, on Sunday, June 23th at around 9:00 UTC (11:00 CEST, 05:00 EDT, 02:00 PDT) from the test range ES...

This is actually not a homework but it looks like one.So I posted here Homework Statement A rocket is pushing a box on empty space. The rocket is exerting a force on the blue colored box.In turn the box is exerting the same force on the rocket.The engine(or fire or whatever) it exerting a...

This isn't a homework problem, and I'm not sure if I'm putting this in the right section, so I apologize in advance if I'm doing something wrong. So far I just learned hamiltonian and Lagrangian mechanics, but I was never taught about how fuel burns when a rocket accelerates, and I'm having a...

If I'm traveling at 22000 miles per second and fire a thruster with an exhaust velocity of 1700 miles per second does the thrust creat drag because I'm going faster? If not what is the effect?

Hey guys, I want to know if I have an equation on thrust correct. I figured what's the acceleration as a function of time. You have the upward thrust = dm/dt v, assuming the mass flow rate and the gas ejection rate is constant and the downward force = -m(t) g, where m=m(t) since it's...

The result found in problem 7.1 says that the velocity of the two stage rocket(v1 in the derivation in the link below) < velocity of a single stage rocket(v2). Am i misinterpreting the results since I thought that the purpose of a multistage rocket was to attain higher terminal velocities. If...

Homework Statement A rocket is launched straight up from the Earth's surface at a speed of 1.80×104m/s . What is its speed when it is very far away from the earth? Answer in m/s Homework Equations K1+U1=K2+U2 The Attempt at a Solution .5mV1^2-(G*m*Me)/r= .5mV2^2-(G*m*Me)/r *** THe mass of...

Hello, I am trying to investigate single-stage rockets and I've come across a particular situation I don't know how to handle. The situation I have is that the rocket in question is burning it's fuel not at a constant rate but at a rate R(\dot{m}). So to find the equations of motion shouldn't...

Homework Statement A Super Loki rocket (http://en.wikipedia.org/wiki/Loki_(rocket )) is used to launch a small payload to above 100 km altitude in a sub orbital flight. Ignoring atmospheric resistance, find the apogee using both numerical and analytic techniques (solve the differential...

Homework Statement I am trying to derive an equation for the net force, or thrust, acting upon a rocket. The equation I get is different from the standard equation given in most textbooks, so I want to know where I am going wrong.Homework Equations F = d(mv)/dt I also make use of the...

Hello, I've been working on calculating the time that a rocket would take to reach ground level, safely. But some things are getting me confused, also I would like to create a formula for this so i can just input values no matter what planet or celestial body you're landing on. To put it in...

Homework Statement Hi guys, I'm working on my water rocket this weekend, and have done most of everything except the parachute deployment. I'm trying to come up with some ideas on how to deploy my parachute. I don't have access to any sort of timer or computer device to deploy it, so am...

I made up a scenario: Let's say I have a rocket at rest in space. The rocket initially weighs 100 kg, 50 kg of which is fuel. If the fuel burns at a constant rate of 1 kg/s and produces a thrust of 100 N out the back of the rocket, what will the rocket's velocity be after it runs out of fuel...

Homework Statement given a graph of the thrust of an engine, we need to determine what mass to make our rocket so that it goes 15m into the air. Here is the graph: http://www.321rockets.com/content/image/26402/800/A8_thrustcurve.jpg I just need some confirmation on if I'm doing it right...

Rocket Project -- need to find mass of rocket to reach 15 m altitude I have a project for grade 11 physics, i have to create a rocket that reaches precisely 15 m altitude, and all I am given is the thrust profile of the engine (force(N) vs time(s) graph) It is an Estes A8-5 engine i have...

A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 59.5E5 kg, of which 7.39E5 kg is fuel. The rocket engine is then fired for 300 s, during which fuel is consumed at the rate of 480 kg/s. The speed of the exhaust products relative to the...

I am a high school teacher attempting to give my students a project for designing a rocket powered by the chemical reaction between acetic acid and baking soda to produce CO2 gas. I have done some simple calculations based on stoichiometric amounts of vinegar and acetic to produce a...

Homework Statement A 1200 kg rocket car is placed at the bottom of a 100 meter long ramp inclined at 10°. The rocket is turned on and it exerts a force of 8300 N for 5.70 seconds, and then it shuts down. Find the speed with which the rocket car leaves the ramp (assume frictionless)...

I am building a liquid fueled rocket engine driven gas generator. I plan to use gasoline for fuel and oxygen gas at a rate of .022lb/sec and O2 at .055lb/sec The chamber is 2.15 in long 1.15 in id with a .238 nozzle. The chamber pressure should be 300 psi with a thrust of 20 pounds. I calculate...