Questions tagged [amateur-rocketry]

Questions regarding home-made rockets.

Filter by
Sorted by
Tagged with
3
votes
1answer
122 views

Ablative graphite in combustion chamber walls instead of a regenerative cooling loop

Would a graphite ablator be a better cooling method for liquid fuel engines than liquid coolant? It's easier to manufacture so probably cheaper. What information is available on the ablation rate of ...
2
votes
2answers
107 views

Trying to make a program to calculate (liquid) engine size. Can you please help me check for any problems?

So as the title says I am trying to write code to calculate engine size and some other parameters. For the equations, I used mostly : Sutton's Rocket Propulsion Elements 8th Edition, and for the ...
5
votes
1answer
72 views

Source of Gregorek's popular drag equation in ESTES TR-11?

In the early 1970s, Gerald Gregorek wrote a technical note on drag for ESTES (maker of model rockets and parts from what I gather). The note is still very popular in the model rocket community, and it ...
3
votes
1answer
101 views

I don't know where to start with the calculations - rocket engine

Last year I stumbled upon the "How to design, build and test a rocket engine" pdf and since then I have been intrigued by making one (or at least calculating it). So I've been doing some ...
5
votes
2answers
529 views

How does spin stabilization intuitively work?

I am not very familiar with physics or rocketry and I am having a lot of difficulty grasping why spinning a rocket or satellite stabilizes it. Most sources I have looked at have said either that it ...
1
vote
0answers
76 views

Need help finding a clean expression for exit velocity [duplicate]

I'm trying to calculate a engine burning LOX and ethanol (96%) and for that I am using both CEAgui, a GUI for NASA's CEA (Chemical Equilibrium with Applications) code Sutton's Rocket Propulsion ...
6
votes
2answers
724 views

Could HIBEX propellant be used for amateur rockets?

The HIBEX rocket was a precursor to the Sprint missile system deployed briefly back in the 1970s. The rocket was only 18 feet long but had extraordinary performance(an acceleration of 100 G's!). But I ...
1
vote
1answer
90 views

how does the open expander cycle seperate the fuel for the pump and combustion chamber

I'm designing a single open cycle expander rocket engine using propane. However, I've been unable to find out whether or not the fuel is split into the turbine and combustion chamber before or after ...
0
votes
0answers
53 views

Help on Rocket Injector Equation

Hello can someone explain me how can I get the value of (6340) because when I try to solve the given values on the book I get (6423.980075) when I round it off it is still not the right answer can ...
2
votes
0answers
26 views

What's the most optimal method of motor attachment for Horizontal Static Fire Tests?

I'm a college student new to rocketry, and am working on the horizontal test structure for a static fire test of our motors. The max thrust for the booster motor is about 6000 pounds, and the ...
0
votes
1answer
126 views

What materials should I use to make a suborbital amateur rocket and where can I buy them? [closed]

I’m trying to make a suborbital rocket to get some pictures of the Earth but I’m not sure what material’s to use and where to get them. I’ve been thinking of titanium for the shell but I’m not sure ...
1
vote
0answers
440 views

PID Controller for Thrust Vector Controlling of High Power Rocket

We are trying to design a Thrust Vector Control system for a High Power Rocket using PID Controller. Can anyone guide us what approach should we use to create this Controller? Rocket Details: Mass: ...
7
votes
2answers
256 views

Can Amateur Rocketeers use Liquid Nitrogen Dioxide as oxidizer?

I was reading similar question as mine here. But no one talked about Nitrogen Dioxide (NO2). Its boiling point is 21C. So easy to store. But how easy it is to handle compared to Hydrogen Peroxide or ...
3
votes
0answers
127 views

Why are hexa airfoils used on rockets despite having more drag that diamond airfoils?

I was doing a study on airfoils shape for a rocket. I tested the diamond and the hexagonal airfoil with Missile DatCom, RasAero and the Shock Expansion theory and from my results it seems like the ...
1
vote
0answers
192 views

Analyzing Amateur Rocket Stability and Range Safety

I am working with a university bunch of other university students on building a very large amateur rocket. Our objective with this rocket is just to go very high, with no significant payload or ...
2
votes
0answers
98 views

How to determine altitude when altimeters fail?

Specifically for high altitude amateur rocketry, how is altitude determined when you get too high(too low pressure) for barometric altimeters to work? I heard about GPS, however, COCOM limitations ...
1
vote
1answer
133 views

Can I able to use RP 1 and LOX in metal tin small size rockets? Is that possible? [closed]

I love rockets. Planning to build a tin rocket but not with water and air pressure. I would like to build a small metal tin rocket using fuel as RP 1 and oxidizer as LOX. I know this is too hazardous ...
1
vote
0answers
429 views

What is the best fuel for bottle rocket? [closed]

I want to modify my firework bottle rocket to fly a mile high. What will be the best fuel for this? Could fuel used in space rockets be scaled down to work in a large bottle rocket?
6
votes
0answers
768 views

Understanding Coefficient of Drag Verses Mach Number for Launch Vehicles

I've been working on a design for a sounding rocket that can go to the Karman line, that I want to make my senior capstone project next year. As a part of this process, I am making a program to ...
3
votes
1answer
710 views

What speed and altitude can I reach with a primitive sugar rocket?

I'm getting interested in amateur rocketry. I'm realistic about it and understand that my skills and technology currently available won't let me construct anything beyond very simple designs, with ...
10
votes
3answers
3k views

Can we use liquid propellants in amateur rockets?

Is it possible and worth it to use liquid propellants like liquid oxygen and liquid hydrogen in amateur rockets? What are the other types of liquid fuel used? Moderator's Note: Remember discussion ...
23
votes
5answers
8k views

What is the feasibility of a rocket hobbyist achieving a LEO orbit with a microsat?

Along with being a rocket hobbyist, I'm also an Amateur Radio Operator. I would like to determine the possibility of placing a "microsat" a miniature packet radio satellite, into a low earth orbit.
2
votes
0answers
106 views

Which solid fuel is optimal for light rocket?

I am in search of comparatively cheap and powerful enough solid fuel. I've found rocket candy, but is it enough to reach 1km altitude? (My aim is a 2 metre high rocket with 0.5kg of payload.)
1
vote
1answer
280 views

new nozzle design, is it a fail?

So I'm an amature rocket scientist. while having a conversation with a friend on a nozzles we though of a new nozzle: Its a double nozzle where it expands a lot and then compress. I want to put this ...
2
votes
1answer
1k views

Problems with the “How to Design, Build and Test Small Liquid-Fuel Rocket Engines” text

For those that have read or consulted the text: How to Design, Build and Test Small Liquid-Fuel Rocket Engines (Rocketlab/China Lake). Otherwise, see steps 10-13 here: https://risacher.org/rocket/...
4
votes
0answers
200 views

Challenges in Development of small scale liquid propellant engines [closed]

Being aeronautical engineering graduate, I have gone through huge literature regarding design of Liquid propellant engines(LPRs). But as I am planning to develop small LPR based on gasoline and oxygen....
32
votes
4answers
10k views

What would one need to do to get an amateur satellite into orbit?

I've recently become interested in amateur satellite packet radio, and I've seen that the bandwidth and thus the bitrate is extremely low on most amateur satellites, not even factoring in noise. So I ...
4
votes
2answers
747 views

How would E85 work as rocket fuel?

In the question Can I make my own RP1? the comments talk about using ethanol and water as rocket fuel. That made me wonder how well easily availible ethanol fuel for cars such as E85 (85% ethanol 15% ...
6
votes
1answer
9k views

Can I make my own RP1? [closed]

Is it possible for me to buy kerosene from a local store and then try to refine it to the extent where it would be considered RP1. If so how would I do it? For those who are wondering me and a group ...
1
vote
3answers
608 views

Is nitrous oxide hypergolic with anything reasonably safe and obtainable?

Can I start an amateur rocket using nitrous oxide as either oxidizer or monopropellant, using a hypergolic slug of something reasonable for use by an amateur rocketeer? What substance could it be?
4
votes
1answer
378 views

Record-setting flights in amateur rocketry

It appears that amateur groups have launched rockets to space (above the Karman line), but these were flights of commercial (Pegasus) rockets by amateur teams. What I am interested in is record-...
3
votes
0answers
118 views

Can a DIY rocket put an object into a stable orbit around earth? [duplicate]

Is it possible for a "home made" rocket to launch an object into a stable orbit assuming a person has calculated the right trajectory?
5
votes
2answers
457 views

Building a ultra-small almost space vehicle

I'm quite interested in small rockets-balloons that can reach more than 50km, thus I want to build one myself (With my school financial support). I just want it to carry like a 350g-450g equipment. ...
6
votes
3answers
4k views

Would a 'small' rocket like this reach space?

I want to build a solid fuelled rocket (I was thinking 3 stage with 2 boosters) that'd launch a micro-satellite (cubesat size) into space but first I want to try reach space (100km) with no payload. ...
2
votes
0answers
90 views

ULA/Ball Aerospace Intern Sport Rocket

So I've seen ULA post about their intern rocket launch a couple of weekends ago and was curious: What are the performance specs on the motors used for the first/second stage? (Class, quantity, etc.) ...
3
votes
3answers
8k views

How did the GoFast 2014 Rocket de-spin?

In this awesome Youtube video of HD footage from the GoFast 2014 Rocket, a de-spin maneuver is performed. Is this a yo-yo de-spin? You can see the de-spin at 0:57 and at 3:47, where it really looks ...
12
votes
1answer
2k views

Whipped cream hybrid rocket

I am currently working on a small hybrid rocket as a summer project. I've decided on using nitrous oxide as the oxidizer, but large tanks are expensive and I don't have a lot of money (I'm in high ...
2
votes
1answer
969 views

Can I launch a homemade rocket from the ground that can reach LEO? [duplicate]

If I had the time and the financial means to do so (and legal rights), could I design, build, launch, and deliver a small (very small) payload to low Earth Orbit? I think it would be awesome to put a ...
23
votes
5answers
49k views

Is it possible to reach space using home-made rocket?

The first stage would be a high altitude balloon, which could reach 30km. Then start a rocket-candy from that high. Without cargo, is it possible to reach the edge of space (Kármán line - 100km), or ...
14
votes
2answers
1k views

Amateur satellite launch

Has there ever been a successful satellite launch done by amateurs? I mean both building the satellite and a rocket to carry it.