Franchon

Ok, thank you for these replies. It's a shame for the reload, do you think it can load new bodies with the internal reload tool (Alt+F12) ?

Ah yes sorry, english is not my native language. For powder rocket, I guess it depends of the canal shape, I read somewhere that Goddard manages to increase the efficiency of powder rocket using a de Laval nozzle, going from 30s to 200-250 of isp (source) The 30s rocket was for an old 1 pound ship rocket, which in design is similar to bottle rocket I guess ?

Let's see, ISP is calculated with the exaust speed (here speed of the water). Assuming a bottle rocket to be a pressure vessel and the pressure converted to speed at the neck, we can use Bernoulli's equation at each end of the convergent: V1²/2+gz1+P1/rho = V2²/2+gz2+P2/rho P1~6barA P2=1 barA z1-z2=15cm V1 = V2/S1*S2 = V2/10 if we assume a bottle of 8 cm in diameter (1.5L) So we have : (V2²-100*V2²)/200 = g(z2-z1) + (P2-P1)/rho V2 = 32 m/s So the ISP of a water bottle is 3 ! But this ISP is decreasing as the volume of air empties out. For a 1.5L bottle filled with 1L of water and 0.5L of air at 6 bar, the pressure decreased down to 2 bar at the end of the thrust, lowering the speed to 14 m/s (ISP of 1.4) So the average ISP is 2.2

Hello fellow kerbalist, One of the big things lacking from KSP is the ability to build directly orbital stuff (of course we can teleport stations in orbit but the kraken does not like it when some are spawn at 1g), i'm wondering if there is a possibility to do a mod giving this ability ? I'm sure a lot of people already discusses about this subject, but I didn't manage to find any discussion on it. I am novice in programmation and only did few part mods for KSP, but if I understood the game's logic, one way of doing this may be: -> Create a part that can be clamped to an asteroid, a planet, etc. -> When it's done, it will create a small body (physical body with a 0g gravity field and no sphere of influence) with the exact same orbit parameters (using Kopernicus I guess) -> On this new physical reference, it should be possible to add a spawn point for ships (using Kerbal Konstruct I guess) As a bonus, we may limit the mass launchable depending on the asteroid size... The few question that I have for the fellow modders are: -> Is it possible to create a spawn point outside of a body reference ? For example on a satellite part ? -> Is it possible to create a body in place of a satellite ? -> If a new body is created within a game session, will it appear immediately, or do we need to load the game again ? -> Can we do a body with a specific mesh, or will it be a sphere with a heightmap ? I can try to work on this, but I will need some tips and tutorials, as I only worked on basic python code. Thank you in advance for your ideas !