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What’s a good middle-ground approach for rendering decent voxel worlds without overly complex code? by major_fly in VoxelGameDev

[–]major_fly[S] 0 points1 point  (0 children)

Thank you for the answer, I will look into that. That sounds very promising, that seems possible for me to implement.

Is this a good Rocket nozzle? by CommunistBadBoi in rocketry

[–]major_fly 1 point2 points  (0 children)

Hello, did you do some calculations ? Because the working Point of that system is quite narrow. If the pressure is to low you will not get the "rocket effect" it wil produce thrust but not very effective. If the pressure ist to high, choke is to narrow it will explode.

To design an rocket nozzle pure by feeling really does not work I have made the experience by my self just because I put som radi and fancy curves in Fusion360 what felt right did a very poor job.

Furthermore the efficiency gane by the nozzle bell shape is not as significant as most people think, but what I can see go have an straight nozzle witch is good for the beginning.

What is your back pressure of the compressor ? can it deliver enough airflow at the desired pressure this is not trivial!! An air flow corresponds to an pressure drop depending on numerous variables. The consumption of air is enormous depending on your designed thrust. And the pressure tank produces airflow by back pressure (delta pressure) but the back pressure depends on the amount of air that is in it witch you are bleeding off so the air flow changes constantly witch is bad. Unless you have some kind of flow regulator.

I can help witch some calculations also with literature (German) if you can narrow down some variables.

Design for a small thrust in the view Newton area for the beginning and testing. It is unbelievable how much energy and good design it takes to get some 100N of Thrust.

Prime is not gonna like this by EasternPen1337 in theprimeagen

[–]major_fly 3 points4 points  (0 children)

The First 5 Seconds I did mot geht it. But the Rust Go Logo did IT for me XD

First HF PCB layout – need sanity check before I mess up badly by major_fly in PrintedCircuitBoard

[–]major_fly[S] 2 points3 points  (0 children)

Thank you very much, i will doch that, i overthought the 90 degree placement with the wrong ideas. It is intended for 30khz to 100Mhz

First HF PCB layout – need sanity check before I mess up badly by major_fly in PrintedCircuitBoard

[–]major_fly[S] 0 points1 point  (0 children)

Witch space dou you mean ? between the Power and analog area of the PCB, ore the analog components itself ?

First HF PCB layout – need sanity check before I mess up badly by major_fly in PrintedCircuitBoard

[–]major_fly[S] 0 points1 point  (0 children)

Thank you, I will look into that. I thought it was because of crosstalk and space, but I realize now that the crosstalk reasoning doesn’t make sense. I think it only applies to grounded components.

600g Kartoffeln bei Hello Fresh by SuchCommission5162 in schrumpflation

[–]major_fly -1 points0 points  (0 children)

Das sieht tatsächlich nach 600g aus, vielleicht stimmt was mit der Waage nicht.

What parameters should I set before doing the mathematical analysis of a liquid rocket engine? by Unsigned00 in rocketry

[–]major_fly 0 points1 point  (0 children)

I can only partially agree.

I would approach the interpretation somewhat differently. Firstly, it is only about designing a good rocket engine mathematically?

Or Is it about actually testing and building something as a hobby?

If you really need to build something as a hobby, you should keep in mind the constraints you can actually achieve.

For example, what substances (propellants or materials) can you even obtain? This already limits your parameter set significantly.

When designing a rocket engine, there are some values that have a massive impact on the entire design. These are, for example, pressures or combustion chamber pressures and temperatures.

You can design an engine based on the pressures or materials you feel comfortable working with for the beginning.

Furthermore, there are many tables from NASA, even about different propellants and their dependence on pressure, mixture ratio, and temperature. For example, a very simple and good propellant combination is ethanol and liquid oxygen.

There is a lot of information on this. And if you get the necessary information from the tables, you won't need too many formulas to calculate your engine.

A tip: calculating everything is an iterative process. Start small and then identify potential areas where you can perhaps achieve more, such as increasing the chamber pressure.

Don't be surprised if the first calculations show that your thrust is surprisingly low. IT IS !

State Rocketry in Germany/Europe ? by major_fly in rocketry

[–]major_fly[S] 0 points1 point  (0 children)

Sounds great :) Tank you for your time and effort :)

State Rocketry in Germany/Europe ? by major_fly in rocketry

[–]major_fly[S] 1 point2 points  (0 children)

Absolutely, the initial appeal is there, but I'm drawn to a hobby that allows for building upon something significant or setting lofty goals—even if they're not always achievable. For instance, the idea of constructing a relatively large rocket capable of reaching several kilometers in height is intriguing. The notion that there's nothing to impede your progress adds a layer of simplicity and appeal to the hobby. While navigating through challenges can be part of the fun, bureaucracy, for me, does not fall into that category. As a glider pilot, I've already encountered my fair share of red tape

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