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steveroof

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    The Ultimate Jool 5 Challenge - 1.0 to 1.3

    in KSP1 Challenges & Mission ideas

    Posted · Edited by steveroof
    Fixed the video embedding.

    Hi all,

    Here is my submission to the challenge.

    - Which game versions did you use? 1.0.5
    - What mods did you use, if any? Kerbal Engineer, Precise Node, Planetshine
    - How many Kerbals are on the mission? Five (one for each moon)
    - How many launches was needed to start your mission from Kerbin? Three
    - How much did your mission cost? $740,260
    - Did you needed a refueling mission? No
    - Did you bring additional stuff like satellites, rovers, etc? No
    - Share the delta-V information too, if you tracked it! This was my planning sheet, based on these maps:https://www.reddit.com/r/KerbalAcademy/comments/1qu5jv/deltav_charts/. I ended up with too much fuel at end of the mission because I had LF tanks for the nuke, but also LF/OX tanks to refuel the lander. I brought enough LF/OX to refuel the lander completely after each moon, but I didn't realize that Bop and Pol would take almost no fuel. I also was not planning to have fuel left in the transfer stage, but I did so I put that in the main ship as well during the mission. I used the procedural test weights mod and lots of subassemblies while designing my ships, so that KER would give accurate deltaV info.

    Maneuver DeltaV Note Eccentricity Correction Plane Change Estimate Active vehicle
    Kerbin to Jool transfer, outbound 1920     100 Transfer stage
    Kerbin to Tylo transfer, inbound to low orbit 1050       Transfer stage
    Kerbin to Laythe transfer, inbound to elliptical orbit 50 Aerocapture     Main ship
    Kerbin to Laythe transfer, inbound to low orbit 50 Aerocapture     Laythe lander
    Laythe descent Black boxed       Laythe lander
    Laythe ascent Black boxed       Laythe lander
    High Laythe orbit 590       Lander
    Laythe to Vall transfer, outbound 10       Main ship
    Laythe to Vall transfer, inbound to low orbit 290       Main ship
    Vall descent Black boxed       Lander
    Vall ascent Black boxed       Lander
    Vall to Tylo transfer, outbound 280       Main ship
    Vall to Tylo transfer, inbound to elliptical orbit 10       Main ship
    Low Tylo orbit 760 After arriving in low orbit, lander must refuel at transfer stage     Lander
    Tylo descent Black boxed       Tylo lander
    Tylo ascent Black boxed After arriving in low orbit, lander must refuel at transfer stage     Tylo lander
    High Tylo orbit 760       Lander
    Tylo to Bop transfer, outbound 10   10 0 Main ship
    Tylo to Bop transfer, inbound to elliptical orbit 120   80 530 Main ship
    Low Bop orbit 50       Lander
    Bop descent 250       Lander
    Bop ascent 250       Lander
    High Bop orbit 50       Lander
    Bop to Pol transfer, outbound 60   60 0 Main ship
    Bop to Pol transfer, inbound to elliptical orbit 80   80 230 Main ship
    Low Pol orbit 30       Lander
    Pol descent 170       Lander
    Pol ascent 170       Lander
    High Pol orbit 30       Lander
    Pol to Kerbin transfer, outbound 1070     100 Main ship
    Pol to Kerbin transfer, inbound to surface 0 Reentry direct from interplanetary transfer   0 Main ship
               
    Description DeltaV Max Eccentricity Correction Plane change estimates Total  
    Main Ship delta v, with lander docked 1980 160 860 3000  
    Transfer stage 2970   100 3070  


    - Any additional note or description? I have some aesthetic clipping on my craft...I have angled nosecones clipped into a fuel tank to give a smooth appearance. I thought it would be fine since the nosecones do not have any fuel in them, and the same could be accomplished with normal struts. I do not have any fuel tanks clipped into other fuel tanks.

    Optimal periapse height for orbital capture

    in KSP1 Gameplay Questions and Tutorials

    Posted

    Hi everyone,

    I like to do "Apollo style" missions where I bring a big ship docked with a lander. If I get to a planet and do my capture burn high up, only the lightweight lander needs to go up and down that gravity gradient while the main ship orbits far away. However this method does not take advantage of the Oberth effect for the capture burn. Also that puts alot of burden on the lander to carry enough fuel to get back to the main ship. On the other hand, If I do the capture really low down, I get the Oberth effect, but I also need to expend fuel hauling the entire heavy main ship back up the slope to escape when it's time to go home. For atmospheres, I am guessing aerobraking is the most efficient, even thought you will need to raise that periapse to escape again?

    Tips and advice?

    Thanks!

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