Hey y’all!

Looking for some suggestions for a “big,” preferably 5+ ft long rocket to launch for my L1/L2. I’m looking to spend $400 on the kit so fire away any suggestions you have! I would love to have something that is ideally fiberglass or carbon fiber simply for display purposes as I intend on putting this on display in my room.

Let me know what you guys suggest!!!

Im looking for one which isn't a toy with play-features and what not (which most of the ones I can find seem to be) or a panorama, just a little model of them.

I have a 54mm motor at hand, but it doesn't have a thrust ring on it. I don't think a tape-wrap thrust ring is going to work, and I don't trust gluing a thrust ring on it, either.

Atlas 3 was developed more or less in parallel with the Atlas 5, which replaced it after a few Years. So why did they develop two rockets at the same time?

https://docs.google.com/forms/d/e/1FAIpQLSfClDQhclZahKk8wco3FOeD7yYcnrXbmNQoghdF4P8SS6BGXw/viewform?usp=sharing

So I've been building my first Eggfinder TX Transmitter, and today it told me to test the transmitter via Putty before mounting the Hope Radio module. However, it says to use 9600 baud, 8 data bits, and no stop bits. The thing is, Putty errors when you set stop bits to 0, and as far as my internet research has gone, you can't. Now I'm stuck and I don't know how else I can test my transmitter.

Got any advice?

I have a pro series launch controller and an electron beam launch controller, both Estes. The smaller one (the electron beam) says it’s rated for everything under E sized engines. Would it be an issue if I tried using the large pro series controller on smaller engines like B or C size, since I’m not sure if the smaller controller actually works anymore? I know it’s mainly meant for E and F sized engines but would it not work for the smaller ones as well?

I am currently working on building a 5.5" LOC goblin and am wanting to find a way to add my eggtimer quasar to it for tracking and flight data. Normally I would just use a normal eBay but I am not planning on doing dual deploy so it seems like I won't be able to do it that way. For my 2 other rockets 3" and 4" I added the Mac Performance nose cone eBay's to accomplish this.

Mac Performance doesn't have a 5" model so that's not possible. What are some other options I could do with this? Is it possible to put a normal eBay in the middle and have it release ok without having a second charge on top?

Thanks for the helpful with this.

Im working on a project for school and need to record flight footage. I'm familiar with smaller form factor FPV cameras, but I don't really know how to operate them outside of FPV. The split 4 comes set with an sd slot, so it's really attractive for my purposes. I figure the easiest thing to do would be to separate battery voltage and the camera's power input with a mosfet so that the camera starts recording when current is allowed through, but I don't actually know if that's how these cameras work. Any ideas?

I am in highschool and I am in rocket group.I must learn the rescue and parachute system. How can ı learn

Hi, I want to start rocketry as a hobby, and as a first step, I want to learn the necessary math before diving in. Can you please tell me on the key mathematical concepts or suggest a roadmap that I can follow along the way.

For very high altitude flights (~100km), would it be practical to calculate altitude from the curvature of the earth? It is of my understanding that for a distinct altitude and a distinct FOV (field of view), there should be only one value of 'extent of curvature'. That extent of curvature can then be matched up to the camera FOV to determine the altitude and the upper and lower bounds of the measurement due to the error.

So I want to try electronic ejection on one of my rockets, I have an egg timer apogee that I want to try out. My dilemma is how can I procure the black powder charges that are needed? Also currently I’m 17 so would I run into any trouble if I were to use this method of ejection at a sanctioned launch? Or should I just stick to alternative forms of ejection?

Hello guys where i can find a flight computer on budget and with tutorial? I wanna start building rocket but is there any tutorials online? Do you guys have any budget flight computer with software and its beginner friendly?

I want serious answers if it is possible and if so how i could build a rocket and reach space. I would like to know the requirments of size, cost and if i can obtain the parts easily.

What should I learn, please share tips. Im in highschool atm

Hello, This is Varun from India. I would like to join a rocketry club as a rocket designer. I am a novice to intermediate CAD designer, and I frankly accept I am a beginner to this industry. I would like to gain experience and expertise in designing rockets. Any intruiging offers? Or any ideas to step into this field?

So I basically calculated the theoretical thrust coefficient of my nozzle using: https://onlineflowcalculator.com/pages/CFLOW/calculator.html

https://preview.redd.it/zwum6lx1kq3e1.png?width=975&format=png&auto=webp&s=f12e9697ed0a7198f7c7c2303d5c37ef7257325f

https://preview.redd.it/wyhn8ru2kq3e1.png?width=970&format=png&auto=webp&s=e9fc0935f6cee8837986104c85f3d6dd10805088

Results for the theoretical exit conditions

And then with the obtained data I used the following equation

https://preview.redd.it/2r9fksw4kq3e1.png?width=469&format=png&auto=webp&s=74d30da5d6319664c9d86d65ba1abf46150ef57f

obtaining Cf=1.5531

I then went to ANSYS to simulate the flow through the nozzle

https://preview.redd.it/0n2nt766kq3e1.png?width=1246&format=png&auto=webp&s=c00928f0a163732562780873cde42d744a954d73

and obtained:

pexit = 91161 Pa
Vexit = 1508.92 m/s

which gave me Cf=1.5485

Which doesnt make any sense, as there is practically no loss from the theoretical Cf.

Does anyone have any idea of what I'm doing wrong?

Setup summary on ANSYS:
density based
axisymmetric
Energy: ON
Viscous Realizable, k-e
Fluid: KN/SB

Inlet
Gauge total pressure: 4000000Pa
Supersonic/Gauge initial pressure: 3990000Pa
Temperature: 1592K

Outlet
Gauge Pressure: 101325Pa
Temperature: 293K

Operating pressure: 0Pa

changed the ratio of specific heat to 1.1261 in the reference values

If anyone could help me I would really appreciate it, thank you :)

I live in Romania and I need a BT-60 tube for my new rocket. I searched on the internet and I couldn't find anything. Can anyone help me?

This is a 3D model of the Estes PNC-55D nose cone. It is designed to fit the Estes BT-55 tubing. Nose cone length is about 95.0mm (3.75 inches). Dimensions were taken from the nose cone from an Estes Sea Dart kit. 

You can download it from Thingiverse for free and print it on you 3D printer.

Estes kits that use this nose cone:
Kit # Kit Name
1901 Sea Dart
1930 Wasp
2015 Strike Fighter

https://www.thingiverse.com/thing:6849562

As mentioned, I am a Korean Student who loves Rocketry and I have faced some troubles amid'st my TVC project. I was designing TVC for my rocket but I cannot really get the hang of modeling it. Can anyone provide me STL or STEP files of your project? I am so sorry.... I won't copy it. However I will alter it to fit my design and will seek to improve via your help. Thank you for reading.

Hello, wonderful people of this inspiring community! I was wondering if there are documents/text books/engineering papers you could point to me that highlight the typical turbopump testing procedure within the rocket engine industry. I'm curious to know what is usually done after, say, the numerical analysis is complete; what assembly procedures are required, calculations for bearings and seals, typical operating procedures for performance maps, cryogenic temperature handling, and other practical considerations that I can't even think of. I'm currently going over Huzel & Huang, and some NASA SP reports, but am I missing any other material or media that you could recommend? Thanks a ton!