[WEB] [1.0.5] KSP Optimal Rocket Calculator v1.20

[Elin]

this is the current suggested design

X2 of stage 2 asparagused into stage 1, all three engines fire at the same time

i believe you need to check the box "Use engine's atmospheric stats"

also, from this site, http://wiki.kerbalspaceprogram.com/w/images/7/73/KerbinDeltaVMap.png

i think your delta V to tylo is wrong

[funkcanna]

So I've started using this tool but really no idea how the ship should look. For example where do the Radial Couplers attach to in Stage 2 and 3? Do they both connect to the main body created in stage 1?

[AbhChallenger]

Requesting this awesome tool updated for KSP 1.0

[Edramone]

Second this request. I really appreciate the work youve done with this tool. Hope to see the update for v.1.0!

[Vheska]

https://github.com/Pyroman515/korc/tree/patch-1

I've updated the numbers in the kspcalc file with the current values I obtained from sandbox mode, download the zip and open the html file.

[Vheska]

http://github.com/Pyroman515/korc/tree/patch-1

I only did edits to the kspcalc.js file to put in the new values the game displayed in sandbox mode. DL zip and open the html file.

[GaryCourt]

Tool has been updated for v1.0!

Also, according to the KSP v1.0 changelog, thrust is now calculated differently. If anyone could provide me the new equations, that would be awesome. Thanks!

[Vheska]

Just wondering if you could put the atmospheric stats option back in. Sometimes it will use an engine on the first stage whose ASL Thrust is significantly lower then it's Vac Thrust and it won't leave the launch pad.

[GaryCourt]

Just wondering if you could put the atmospheric stats option back in. Sometimes it will use an engine on the first stage whose ASL Thrust is significantly lower then it's Vac Thrust and it won't leave the launch pad.

I removed it as I wasn't certain that atmospheric thrust was being calculated properly since KSP v1.0 changed how thrust is calculated. I'm hoping someone can get me the new equations.

[Vheska]

It should just be:

TWR = Fthrust / (tM*g)

where Fthrust is the Max thrust given on the info page in kN, tM is the total mass of the vessel in kg, and g being the acceleration due to gravity.

They give the ASL thrust for each engine on the info panel.

[khearn]

I'm a little confused as to how this design is supposed to work. Note that there are no decouplers listed for stage 3.

[TABLE=width: 500]

[TR]

[TD]Stage[/TD]

[TD]Part[/TD]

[TD]x[/TD]

[/TR]

[TR]

[TD]0[/TD]

[TD]Payload: 1.4t[/TD]

[TD][/TD]

[/TR]

[TR]

[TD]1[/TD]

[TD]TR-18A Stack Decoupler

FL-T200 Fuel Tank x5

LV-T45 "Swivel" Liquid Fuel Engine[/TD]

[TD][/TD]

[/TR]

[TR]

[TD]2[/TD]

[TD]TR-18A Stack Decoupler

FL-T200 Fuel Tank

LV-T45 "Swivel" Liquid Fuel Engine[/TD]

[TD]x3[/TD]

[/TR]

[TR]

[TD]3[/TD]

[TD]FL-T100 Fuel Tank

FL-T200 Fuel Tank x3

LV-T45 "Swivel" Liquid Fuel Engine[/TD]

[TD]x3[/TD]

[/TR]

[/TABLE]

I'm assuming that stage 2 has a single decoupler at the top, with a FL-T200 tank and an engine blow, then radially attached to the sides would be the other two tanks and engines. But I don't understand how stage 3 is supposed to attach to stage 2 without any decouplers. Am I missing something?

All of the designs I'm getting with no radial decouplers are similar to this, with no decouplers listed for stage 3.

Thanks,

Keith

[Vheska]

This happens to me often if I don't have any radial decouplers selected. I'm guessing the tool wants to put in radial decouplers, but knows it can't because none are selected, so it puts nothing instead. In your case, you should probably put a stack decoupler underneath the seconds stage

[GaryCourt]

Just wondering if you could put the atmospheric stats option back in.

Done.

[Edramone]

@GaryCourt would it be possible for you to add an import an export function (e.g. to JSON) so we could save our settings (known techs, and all the other parameters) and import them again? This would be really nice and convenient. Thanks for your great work!

Edited May 6, 2015 by Edramone
typos

[jd284]

To better approximate ascent through an atmosphere, would it be possible to extend the "Use engine's atmospheric stats" option so that it only applies for the first X amount of Delta-V? On Kerbin for example, depending on TWR and how you do the gravity turn, approximately the first 1200-1600 m/s delta-V are atmospheric. Making this an option would give a neat tool to optimise atmospheric ascent.

Otherwise I find that with the "atmospheric stats" option selected, the upper stages are (relatively) overpowered and heavier than they need to be, and without the option I can't even get off the launchpad because it always seems to prefer engines with low atmospheric thrust. Well I guess they have higher vac Isp so without an atmosphere that makes sense.

[CamiloNino]

Done.

First of all, I registered in this forum to tell you how awesome your tool is. I have been using it for a while.

About the atmospheric stats, I noticed that it is working again when optimizing for mass, but it is still not working for cost.

Thanks for your work, I will see if I can make some improvements too

[AbhChallenger]

With KSP 1.1 on the horizon will you update this great tool to include any changes made to stock parts? If so is there any chance you can include the SpaceY main and expansion parts?

[salajander]

Great tool! Been very useful for getting ideas on building better rockets.

To better approximate ascent through an atmosphere, would it be possible to extend the "Use engine's atmospheric stats" option so that it only applies for the first X amount of Delta-V? On Kerbin for example, depending on TWR and how you do the gravity turn, approximately the first 1200-1600 m/s delta-V are atmospheric. Making this an option would give a neat tool to optimise atmospheric ascent.

Otherwise I find that with the "atmospheric stats" option selected, the upper stages are (relatively) overpowered and heavier than they need to be, and without the option I can't even get off the launchpad because it always seems to prefer engines with low atmospheric thrust. Well I guess they have higher vac Isp so without an atmosphere that makes sense.

Yes - some better heuristics for atmospheric stats would be great. I don't ever want the LV-909 at the launchpad, for instance, but it's great in far upper atmosphere and vaccuum.

Also, sometimes the suggested asparagus builds are a bit ... weird? FLT 100+FLT 200+LV 909 surrounded by 4 x Rockamax 64+Mainsail doesn't really build out that well

[Kerbonavt]

That is exactly the feature I'm missing - a "model atmosphere for first X dv" would be extremely useful to get real "practical" designs.

Linearily transitioning from ISP_atmo to ISP_vacuum while going through that atmospheric dv part would make the simulation even better.

Great tool anyway .

Edited September 23, 2015 by Kerbonavt

[Pro_consul]

There appears to be a limitation that stops the tool from generating SSTO designs. When I set the max # of stages to 1, I get no results, just the banner saying that the most optimal design was found. Am I missing something here?

[Elin]

[TABLE=width: 500]

[TR]

[TD]Stage[/TD]

[TD]Part[/TD]

[TD]x[/TD]

[/TR]

[TR]

[TD]0[/TD]

[TD]Payload: 1.4t[/TD]

[TD][/TD]

[/TR]

[TR]

[TD]1[/TD]

[TD]TR-18A Stack Decoupler

FL-T200 Fuel Tank x5

LV-T45 "Swivel" Liquid Fuel Engine[/TD]

[TD][/TD]

[/TR]

[TR]

[TD]2[/TD]

[TD]TR-18A Stack Decoupler

FL-T200 Fuel Tank

LV-T45 "Swivel" Liquid Fuel Engine[/TD]

[TD]x3[/TD]

[/TR]

[TR]

[TD]3[/TD]

[TD]FL-T100 Fuel Tank

FL-T200 Fuel Tank x3

LV-T45 "Swivel" Liquid Fuel Engine[/TD]

[TD]x3[/TD]

[/TR]

[/TABLE]

I'm assuming that stage 2 has a single decoupler at the top, with a FL-T200 tank and an engine blow, then radially attached to the sides would be the other two tanks and engines. But I don't understand how stage 3 is supposed to attach to stage 2 without any decouplers. Am I missing something?

All of the designs I'm getting with no radial decouplers are similar to this, with no decouplers listed for stage 3.

Thanks,

Keith

this is what I think it means

the second stage attaches to a single decoupler so that stage 3 can be symmetrical (without blocking the engines in stage 2.) stage 3 also connects to the same decoupler (or to the side of the stage 2 tanks)

replace the pod with your 1.4t payload

[Sim^moN]

Hi! Great job on the calculation tool. It's very usefull. 
I noticed that there is no option to build a rocket with MkI Liquid Fuel Fuselage and the LV-N Nerv engine. Any possibility you could add it?
 

[Mike the great]

Can you add the Nerv atomic one? And it doesn't have any liquid fuel only tanks

Great job calculating heavy rockets by the way

 

Edited December 26, 2015 by Mike the great

[Mike the great]

I guess that you may also add some jet engines for in atmosphere flight

Edited December 26, 2015 by Mike the great
Think the previous one is not appropriate

[OldLost]

I have a payload that is 2.5m. How do I tell the tool to start at that size for the remainder of the rocket? It keeps giving me designs that start at 1.25, and that makes a funny looking rocket!