sdj64

The Ultimate Jool 5 Challenge!

1065 posts in this topic

17 hours ago, sdj64 said:

You can cut out planning maneuvers, as long as you have some footage of executing them.  Also if it's clear where you're going, such as during a long timewarp or on an easy landing on Bop, Pol, or Vall, the middle of that can be cut out.  But any time fuel is tight, piloting is difficult, or the sequence of actions is confusing should obviously stay in your video.

@sdj64 thanks. What about tweaking burns of a couple of dV and rendevous (it's a multi-part ship), include in full?

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10 minutes ago, Kerolyov said:

@sdj64 thanks. What about tweaking burns of a couple of dV and rendevous (it's a multi-part ship), include in full?

you don't have to include all of the tiny burns.  Especially if the resource window is open it will be easy to see fuel differences.

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Posted (edited)

 

Here (finally!) is my entry for the 1st Level of the Jool 5 Challenge:

KSP Version: 1.2.2 Windows 64bit (with comms turned off)

Kerbals: 1 - Valentina Kerman

Launches: 1

Refuelling: No

Mods

Visual Mods:

  • Scatterer
  • Planetshine
  • DistantObject

Info Mods:

  • Kerbal Engineer Redux
  • Precise Node
  • Better Burn Time
  • Trajectories
  • Navyfish Docking Port Alignment Indicator
  • Landing Height
  • Kerbal Alarm Clock
  • Transfer Window Planner

Build mods:

  • RCS Build Aid

Auto-Pilot Mods:

  • GravityTurn
  • Vertical Velocity Controller
  • Horizontal Landing Aid (installed but not used on this mission)

 

The Mission Consists of 4 main parts:-

  1. Laythe space plane (will be abandoned in Laythe orbit after landing there)
  2. Fuel tank unit - this is used to store the fuel needed for upcoming landings and burns.  Will always be in high orbit. The outer tanks can be dropped when empty, has both mixed and liquid only tanks. Has a probe core for independent control.
  3. Drive unit with two nuclear engines.  Used for most of the main burns and also used to start off some of the landing descents. Waits in low orbit for the lander.  Returns to Kerbin and abandoned in Kerbin orbit.  Alsio had probe core for independent control.
  4. Lander this has drop tanks for Tylo and will land on the remaining three moons without the extra tanks.  Also the lander can will return to Kerbin

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zaHjJGYh.png

 

My ship on the launch pad was 1357 tonnes and cost 788,847 roots and had a launch TWR of 1.8

dV left after reaching LKO was 5447 m/s (vacuum) and mass of 268 tonnes

The Tylo lander had 6125 m/s dV (vacuum) and the fully fuelled lander without the Tylo droptanks was 2751 m/s dV

 

Been a blast doing this mission.  Hope to attempt levels two and three soon!

Edited by Kerolyov
Typo correction
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@Kerolyov Congratulations, you have completed the Jool 5 Challenge on Level 1!  I liked the separate drive unit and fuel section, it was an innovative and efficient choice.  Your video was great, one of the best I've seen in striking a balance between being exciting to watch and informative to judge.

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11 hours ago, sdj64 said:

@Kerolyov Congratulations, you have completed the Jool 5 Challenge on Level 1!  I liked the separate drive unit and fuel section, it was an innovative and efficient choice.  Your video was great, one of the best I've seen in striking a balance between being exciting to watch and informative to judge.

Thanks @sdj64 I'm happy to know my editing worked out as was thinking I hadn't cut enough out, if I get time I might upload a second shorter version for more general consumption.

As for the mission I felt I still have a lot to learn in timing my gravity assists as couldn't find a Tylo assist to both capture at Jool and get me into a Laythe orbit without too much dV expenditure to circularise at Laythe, in the end the short burn at periapsis of the Tylo assist and a second burn to get rendevous with Laythe were the most efficient solution I could come up with. 

Second thing I struggled with was the transfer from Vall to Bop, my fuel unit was in the high orbit and so that fixed my ejection angle and couldn't find an easy direct burn solution and had to first do small escape burn then do expensive plane change and then do transfer burn to get there, luckily I had over-engineered the amount of dV  on my ship so had more than enough but think there is probably a better solution.  If anyone has any tips on getting a more efficient Vall to Bop transfer I'd love to hear how you do it.

Final thing to note is my Laythe aerobrakes had to be done in stages to avoid burning up, this ws learnt the hard way and was glad I had saved just before I started the Laythe descent!

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5 hours ago, Kerolyov said:


Second thing I struggled with was the transfer from Vall to Bop, my fuel unit was in the high orbit and so that fixed my ejection angle and couldn't find an easy direct burn solution and had to first do small escape burn then do expensive plane change and then do transfer burn to get there, luckily I had over-engineered the amount of dV  on my ship so had more than enough but think there is probably a better solution.  If anyone has any tips on getting a more efficient Vall to Bop transfer I'd love to hear how you do it.

Use Tylo. If you arrange a slingshot around plane intersection - it's a very cheap way to make a major plane change (and in this case raise orbit as well). BTW, in the cases of having to use a specific ejection angle due to your parking orbit, it is also possible to arrange a slingshot off the very body you started from (after an orbit or two... sometimes even in half an orbit), if you couldn't find a better solution

5 hours ago, Kerolyov said:

Final thing to note is my Laythe aerobrakes had to be done in stages to avoid burning up, this ws learnt the hard way and was glad I had saved just before I started the Laythe descent!

Yeah, Laythe's upper atmosphere is such a brick wall. Cuts off quickly at the edge but just below that it's almost as draggy as on Kerbin at the same altitudes. Although I faced quite the opposite problem - wanted to lower orbit in several passes, barely avoided falling all the way down to surface on the first

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Posted (edited)

It took me a long time, but I finally came to the point where i could start my Jool 5 mission in my Caveman Evolved plus Munless Night career.
I just Upgraded the R&D center and had very low funds. therefore i am going for the low cost/mass sub-challenge.

KSP 1.3 Linux 64bit

Mods:

[x] Science!
BetterTimeWarpContinued
KAC
KER
Precise Node
RCS Build Aid

The vessel is a SSTO which costs 94452:funds: and has a wet mass of 43.588t

 

Edited by jonny
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Wow, great to see this challenge is still going, did it way back in 0.23

Cheers all.

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You know what, I might actually give this a go. I've been doing to much combat recently, and I need a change before I get back to blowing things up spectacularly. I'm thinking a large mothership made out of Mk3 parts, with a hangar made out of 2 mk3 cargo bays next to each other open to create one big space. Two sections, assembled in orbit, with refuelling craft to fill the tanks before departing. Give me a week or so to discover this design is impractical, and I'll report back. :) 

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Posted (edited)

@sdj64 - I did it on Hard, mission report is found here: 

 

 

Does this mean I get an "Expert" status?

Edited by Xyphos
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On 7/24/2017 at 5:14 PM, jonny said:

It took me a long time, but I finally came to the point where i could start my Jool 5 mission in my Caveman Evolved plus Munless Night career.

Damn that was impressive. Good Job.

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The last 2 moons I had to visit... and anomalies.

 

At least these shuttles need no atmosphere for horizontal takeoff

Funnily enough, there was a very cheap option to get back to Pol, yet I managed to leave so much fuel up there that we had no trouble flying to Bop in a rather straightforward way

 

And then, this time with a proper slingshot, HRO-M flies to Vall

And looks like it still got half the delta v still in the tanks

 

Probably, this shuttle will return to Bop to top off the fuel and then both ships will fly back to Kerbin together

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Posted (edited)

@jonny Congratulations, you have completed the Jool 5 Challenge on Level 1!  Your plane was lightweight and cheap, earning you the top spot in both low cost and low mass!  It was also very part count efficient for a Jool 5 mission.  I thought the nuke on the nose was a unique choice, and I liked the yaw maneuver leaving Kerbin.  You were pretty close to Level 2, but that Tylo lander would probably have to be much bigger to carry 2 Kerbals.

 

@Xyphos Congratulations, you have completed the Jool 5 Challenge on Level 1!  There is no official reward for hard mode, but your piloting was certainly expert-level.  I can see how your decisions both in the design and the execution were focused on safety - maneuvers, parachute landing and vertical takeoff on Laythe, high delta-v on Tylo, excess battery capacity on the ion lander - to ensure confidence despite the lack of quicksaves.  If you ever do the challenge again, you misread the refueling rule.  You are allowed unlimited refueling from your own ship, and the refueling mission is a separate launch from Kerbin meant to allow you to rescue a ship that has run out!  Very informative video as well, thank you for the captions that explained all the complex maneuvers.

 

Sorry for the delay in judging these.

Edited by sdj64
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And here I go with the conclusion of my mission with the shuttles

KSP version: 1.2.2
Level 3, ISRU (took 3 mining rigs, left 2 on Laythe), but no nukes
mods: only kOS, and I didn't even use it for flying

Launches: 2   (2 shuttles)
Landers: 2 shuttles (4 crew each)
Return to KSC: 2 shuttles
Additional vessels (all carried by the same shuttle): hydrofoil/hydroplane (circumnavigated Laythe and left there), mobile mining base (left on Laythe), 2 mapsats (for Laythe and Tylo)

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Full report here:

 

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I have really let this go too long, my apologies.

@Alchemist Congratulations, you have completed the Jool 5 Challenge on Level 3!  I was impressed by the strategy to complete the mission with two almost identically sized vehicles, and it was interesting to see the subtle differences between the two shuttles for their different roles.  The HRO has some amazing capabilities and and proved to be capable of the toughest landings both in and out of atmosphere.  Congratulations also for your completion of the Elcano and Shuttle Challenges!

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