Need. . . . . .Bigger . . . . . .E.n.g..i...n...........

[PB666]

I was playing around with Real Solar systems mod for KSP.

I get a kick out of how freaking hard it is.

The biggest problem, I need more engine and higher density of thrust per unit of surface area.

I can get the rocket off the ground but when I go to make a gravity turn . . . .

I was looking at the engines, they are either of poor ISP or they have a fraction of the thrust needed to carry 50 tons needed. So im now search Wikipedia for a better rocket engine, lol.

 

[Green Baron]

Isn't that rather gameplay than science & spaceflight ?

Have you tried mods like KW or SpaceY ? Pretty easy with those if remember right ...

[PB666]

I'm actually looking at rocket engines trying to decide which engine I am going build, lol. Should I build an F1 engine or supersize a SSME. So far as yet all my part mods are mine, so that if I need an engine and it exists then I make it in blender and config it in the game. http://www.projectrho.com/public_html/rocket/supplement/RocketChart04_ManualEdit2.pdf

Got a big graphic in front of me right now trying to find something. If I cant get an engine that gets fuel enough to get to Mercury, then I need a final stage engine efficient enough to finish the job.

https://en.wikipedia.org/wiki/RS-27A gee, why build an engine that you cannot throttle.

This is going to make some of you unhappy since you detest the Delta IV program but  . . . . . .

https://en.wikipedia.org/wiki/RS-68

This is the engine I am going with. SSME despite having a higher ISP does not have the energy production per surface area that this engine has and is much easier to block on large fuel tanks.

At 3136kN of Thrust and engine weight of 6.6 t, its a much better choice. Ve of 4140 and 3700 at MSL this is efficient enough to do the job. Its diameter is 2.45m perfectly fitting into the tanks.

 

 

Edited October 30, 2017 by PB666

[MatterBeam]

Have you installed the SMURFF mod or the more complex Realism Overhaul? They adjust the thrust of the engines and the mass of the components to make the rockets perform how they should in real life.

[PB666]

8 minutes ago, MatterBeam said:

Have you installed the SMURFF mod or the more complex Realism Overhaul? They adjust the thrust of the engines and the mass of the components to make the rockets perform how they should in real life.

Not yet most of my parts have already been tranformed to real life values. I just never had the need to a heavy lift engine.

[PB666]

Hmmm, well had to convert everything to H2 and 02.

The ET FT for SST has 629.3 and 106.3 kT of oxygen and hydrogen, respectively. This gives an O:H mass ratio of 5.92:1 (6:1 as the stated burn ratio).

The reaction is 2H₂ + 0₂ = 2H₂0 which 4H = 4.0316  and 2O = 15.9996 mass units this produces a mass ration of 7.93:1.  Seems like there is too much oxygen in the big orange tank.

[KerikBalm]

The need for modded engines/Realism overhaul is why I limited my KSP rescale to 3x rather than ~10x. Of course this means that Eve is a bit smaller than Mercury, and Jool is only ~3/4th the radius of Uranus... but whatever, I don't want to deal with a whole bunch of part mods.

[NSEP]

Add more boosters maybe? Did you change the configs of the boosters? They can definitely help you and give you a great kick.

[ment18]

The M-1 engines might be good, it was a proposed super large hydrolox engine for a rocket that would have otherwise used 12 j-2s.  6.67MN  428s Vac

https://en.wikipedia.org/wiki/M-1_(rocket_engine)

Edited October 31, 2017 by ment18

[Deddly]

On 30/10/2017 at 4:17 PM, Green Baron said:

Isn't that rather gameplay than science & spaceflight ?

Moved to Gameplay Questions. Please just report it next time, then we can get to it sooner, thanks

[Laie]

@PB666 not sure if you've been asking a question or making a statement, seeing as you didn't post it into the Q&A section.

There is of course a reason why RSS recommends to install RealFuels or at least SMURFF. Then again, they're not strictly necessary... all you really really need is sufficiently big tanks.

1952 vision of spaceflight: 6400t takeoff mass (or 7000t, depending on source) to deliver ~100t of spaceplane to a 1700km orbit, including ~35t of payload. On engines with 230-280s ISP, much worse even than stock.

Just for lulz and giggles, I started a RSS career with stock engines over the (long, for me) weekend. Specifically with the idea of recreating the above vessel . Somewhat accidentally, I found myself playing career in that setting -- it was actually quite interesting. However, at default settings the funding falls short once you're out of the easy "firsts".

Edited November 2, 2017 by Laie