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KSP2 Artemis Recreation


Ghostii_Space

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5 hours ago, Fletch4 said:

again with the glossy, lego parts...

I think most YTbers are going a bit overboard with the coloring schemes, almost nobody even touched the transparency option that probably will make everything a little less glossy and lego-like. Also basically everyone went for bright and saturated colors.

The same can be said about the dev screenshots so far, it's like everyone is using the color palette only in two dimensions, completely forgetting that they can tone down the colors a bit or that the transparency setting is a continuous axis and not a boolean switch.

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On 9/3/2022 at 11:59 AM, Ghostii_Space said:
The #Artemis mission inspired our team to fly our own recreation in KSP2. We’d be lying if we said we made it to orbit on our first try.
 
From all of us at #KSP2 to all of our friends NASA Artemis there is no shame is reverting to VAB :wub:

As I've noted before, unless you re-balanced the Vector engines {or their analogues} it's only a look alike. 

 

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34 minutes ago, Tweeker said:

As I've noted before, unless you re-balanced the Vector engines {or their analogues} it's only a look alike.

Kerbin is 1/10th the size of earth, nothing is going to function in KSP like it does in real life. And they did actually nerf the Vector's thrust by quite a bit: in what we've seen from the ESA event, its thrust is 850kN compared to 1000 in KSP1. (And 2200kN on the IRL RS-25, for reference.)

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1 hour ago, obney kerman said:

Kerbin is 1/10th the size of earth, nothing is going to function in KSP like it does in real life. And they did actually nerf the Vector's thrust by quite a bit: in what we've seen from the ESA event, its thrust is 850kN compared to 1000 in KSP1. (And 2200kN on the IRL RS-25, for reference.)

Thrust of 850 kN is still about 2X more than it should be.  The RS-25's thrust  is about 1/8th that of an SRB at lift off,  In KSP it's about 1/4 to 1/3th, mainly owing to the Vector being greatly OP.  IRL the SRBs are 15,000 kN, to  the RS-25s 160 kN at lift off, giving a ratio of  8.06:1  In KSP the Cyldesdale booster are 3300kN to the Vectors 936kN at lift off,  or about 3.52 to one.  

The vector has been broken for a very long time, and a big part of the reason is that it was oversized to account for the fact that the Kickbacks were undersized. The Vectors make about 70% of the thrust of a Mastodon, which is an F-1 analogue, it should make something closer to 30%.

425kN would be much more appropriate. 

 

  

Edited by Tweeker
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35 minutes ago, Tweeker said:

Thrust of 850 kN is still about 2X more than it should be.  The RS-25's thrust  is about 1/8th that of an SRB at lift off,  In KSP it's about 1/4 to 1/8th, mainly owing to the Vector being greatly OP.  425kN would be much more appropriate.

Honestly, it kind of sounds like more of a case of underpowered SRBs than overpowered Vectors.

Shuttle/SLS SRBs: 15,000+ kN
'Clydesdale', largest SRB in game: 3,300kN
RS-25: 2,279kN
KS-25: 850kN

So the answer is to add 3.75m solid boosters in future? Maybe?

Edited by obney kerman
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53 minutes ago, obney kerman said:

Honestly, it kind of sounds like more of a case of underpowered SRBs than overpowered Vectors.

Shuttle/SLS SRBs: 15,000+ kN
'Clydesdale', largest SRB in game: 3,300kN
RS-25: 2,279kN
KS-25: 850kN

So the answer is to add 3.75m solid boosters in future? Maybe?

Not really, when the Mammoth engine was add it was with the Kickback boosters.   The Clydesdales weren't added until much later. The Mammoth was balanced to work with the Kickback as a pseudo SLS, The Kickbacks were too small and as a result the Vectors/Mammoth was too large.  

The KSP SLS consisted of 4x Vectors making 4,000kN and 2X kickback making 1350kN.  Because the Vectors are so OP you could ditch the SRBs altogether and ad one more  Vector. That would not work IRL. With the Vectors the core stage of  a  KSP Artemis  analogue would account for 75% of the liftoff thrust of the , vs 25% IRL. 

The Clydesdales have since been added and their specs are proportional  to the five segment booster, ~22% of the thrust.  Which is IMHO a good ratio to real life performance for KSP, alot of other engines in KSP fall in this range. The Cheetah has ~22% of the thrust of a LR-91, the Skiff has ~23% the thrust of a J-2, a Mastodon has ~17.5% of the thrust of the F-1. So there is a definite  range the ratio of KSP to IRL performance should be.  

The Vector's however falls far outside this range, It's performance is closer to 50% of real life  ---- ~935 kN vs 1860 kN at sea level.  425kN at sea level would be about right.  

  

Edited by Tweeker
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