[Aachen]

The issue with ksp is that you first need to figure out the rocket design before you start on orbital mechanics (that's why I ended up building my own web simulator for that part anyway, and also because ksp doesn't support my OS)

[lagrange77]

> I ended up building my own web simulator for that part anyway

Is it public?

[Aachen]

Sure, didn't want it to seem like an ad, also because it's not quite ready for prime time, I still intend to make a better UI... https://lgms.nl/p/badgravity/

For something ksp-like, I guess the easiest is to press "play" on the Pluto scenario on the left. Note the hints in the top left. Trying it myself now, it seems the scenario is set quite quickly, so I'd set the simulation "steps per run" to maybe 5, and the thrust should be something on the order of 1 (I thought the scenario data should have set that appropriate to the craft but apparently not)

Edit: oh yeah and it expects arrow keys and a scroll wheel, there is no button overlay implemented for mobile yet

[lagrange77]

Thank you, it's really cool! I started something similar, but way less sophisticated. Basically i implemented a n-Body solver in Julia, compiled it to Webassembly and did the drawing with canvas, like you. This motivated me to work on it again.

> The issue with ksp is that you first need to figure out the rocket design before you start on orbital mechanics

Come on, it's not rocket science.

[nico]

> a n-Body solver in Julia, compiled it to Webassembly and did the drawing with canvas

Awesome, do you have GitHub repo with the code? or a website with it running? would love to see it

[lagrange77]

Unfortunately not, i couldn't solve some (numerical) stability issues and i buried it in my "dev directory". But if i'll get it presentable, i'll be doing a Show HN.

[nico]

Thank you. It would be great if you posted it!

I’ve been simulating some halo orbits and also running into stability issues

It seems it’s pretty typical and depends on the integration method used, as well as the timestep

In general it is quite a hard problem to solve. Mathematically, it’s a very difficult problem. But also computationally, it is almost impossible to fully simulate an n-body system without getting chaotic orbits. Then you have to either cheat (by manually tweaking trajectories) or just picking a pretty small time range for the simulation

[nkrisc]

The design requirements are pretty forgiving and as I recall there are some pre-built rockets you can use.

[mmh0000]

Getting to orbit (or anywhere really) is very well documented in the KSP world. There are tutorials, videos, and guides galore.

This tutorial[1] includes details on how to build your rocket, how to fly your rocket and how to do successful reentry.

[1] https://wiki.kerbalspaceprogram.com/wiki/Tutorial:_How_to_Ge...