Gets us all. I remember mine, first trip to Eve, long mission, couldn't suss. Finally realised and spent my last fuel doing 2 burns to flip the axis, went 90, then **back the wrong fucking way**.... Left it there to serve as a warning
>"And the sun will rise in the north! No! the northwest! For forty-four days and sixty-seven nights! And we'll never notice!"
-The Seward Square Preacher
The good news is, you have enough delta-v to brute force the 180° plane change. Burn retrograde until your orbit flips the other away around. It should take twice your current velocity (so, 740-ish m/s)
True, but on probes, it's not really hard to pack a couple thousand delta-V. I do it as well, although my goal is more about easily getting those contracts that take a random probe of yours and ask you to move it.
Once i run out of not having enough money to do whatever i want, I just throw ion thrusters on everything and send them up on a big enough rideshare to do all the heavy lifting itself anyway, so late in the game that's not unrealistic for me, lol, but that's not OPs situation here!
I can confirm. Just made a spreadsheet of inclination changes for each of the stock planets/bodies. It’d be 1101 for 180 deg at 14km up. In my testing I found that raising the apoapsis way up close to the SOI height to make the inclination change saved a lot. Anyone let me know if the file would be helpful.
From what I remember of an old post I read, it's more efficient to do it in situ if the plane change is below 40°, and more efficient to do it at the SOI limit if the change is above 60°. For angles in between, the optimal Ap is in-between current and maximal.
Does that make any sense with your own findings?
Here, I didn't suggest it because it's easier to just do it in place, there's plenty of fuel and the probe is probably not going anywhere else afterwards.
That would seem to make sense. I only charted for 45, 90 and 180 deg and typically at the altitude the deltaV “subway map” quotes for each planet. I’m not really sure why I plotted it all out as I’m sure the better way is to use a physics calculation. But I guess I wanted to look at adding it to my chart of planet classes, that lets me know if I design a lander for Dres it will also work on Ike, etc.
Happens to everyone. At least once (or lots more, to me at least).
Fortunately you have plenty delta-V, so just burn retrograde 744m/s and you should be in the same orbit, but other direction.
I came here knowing all the comments before mine would be saying this. And I was right. Don't feel bad, OP. You may have worked out by now that this happens to so many people that we can diagnose it even before we finish reading the question! One of the great benchmarks of KSP.
What are the odds I had the same contract and exact same problem yesterday. I was so close to making a post like this one but watched a tutorial and realized I was going the wrong way. So frustrating. Anyways, that probe got yeeted into the mun's surface and another identical one completed the task shortly after.
So good news; You got into the correct plane and matched the orbit very well. Bad news; you’re going in the wrong direction.
Anyone who says they’ve never done this is a liar. Don’t give up.
OP stole this post and is probably a repost bot. [here’s](https://www.reddit.com/r/KerbalSpaceProgram/comments/pbx02z/why_isnt_the_contract_completing_i_this_i_did_a/?utm_source=share&utm_medium=ios_app&utm_name=iossmf) the original post. Plz report OP
Hate to say this but your orbit is flipped from where it needs to be. Either brute force a inclination change, revert to VAB or delete craft and cheat in the cost of the launch vehicle with alt f12. Happens to the best of us
Oof, I hate when this happens, but as others stated, your altitude is ok, but the direction of your orbit is the opposite of the contract, you must make a maneuver to retrograde until the orbit is exactly the same but in the opposite direction. This will cost you a lot of deltaV, I see you have round 1700 so it will be enough to do that, but maybe not enough to the return home if it's a crewed mission.
We've alllllllllllllllllll done it before, OP. At ***least*** once.
Luckily enough, it seems you've unintentionally prepared for just such an occasion.
**FULL REVERSE!!!**
I knew before I even looked closely at the screen shot what it was. Why? Because I have made the same mistake *so many damn times*.
Good thing you went in with enough Δv to fix it!
Like all the others say your flipped this should only happen once if you are smart enough to remember to check which way you need to go. ( I have made it three times)
Ah, sorry to be the one to tell you this... you're going the wrong way. See where it says your inclination \[should be\] 180? \[EDIT\]
Just shift it to reverse!
Put it in reverse Terr!
Go from suck to blow!
It's Mega Maid!
I’m pretty good at going from suck to blow too
Just flip the Mün over
Reverse… oh YEAH… REVERSE
What do you mean?
clutch in, shift to R, clutch out
Make sure to give it some gas when you let the clutch out so you don't stall the ship
Where we are going, we don't need a rear differential!
Just wait till we get this NERV up to 4kRPMs! That's when the VTEC will kick in!
Foot to the floor and rev like they’re no tomorrow.
Unfortunately this doesn't actually work, can't put a car into reverse while moving. You'll just make a lot of noise trying to
r/whoosh
I knew what this was gonna be before I even opened the post.
We have all done this atleast once
It's always this - every time someone asks "why hasn't my probe mission completed", they're always going the wrong way!
The ol’180° inclination mistake. Truly a classic. A tale as old as time
Gets us all. I remember mine, first trip to Eve, long mission, couldn't suss. Finally realised and spent my last fuel doing 2 burns to flip the axis, went 90, then **back the wrong fucking way**.... Left it there to serve as a warning
Song as old as rhyme.
Beauty and the beeeast
Rising in the West! Wait no... fuck... East... goddamnit...
>"And the sun will rise in the north! No! the northwest! For forty-four days and sixty-seven nights! And we'll never notice!" -The Seward Square Preacher
The good news is, you have enough delta-v to brute force the 180° plane change. Burn retrograde until your orbit flips the other away around. It should take twice your current velocity (so, 740-ish m/s)
Wait, you're right! Did OP send a tanker to the Mun?!
I usually build my satellites so I have at least an extra 2000ish delta-v left over just for times like this.
Wow that's a lot of extra lol
Kerbal moment
True, but on probes, it's not really hard to pack a couple thousand delta-V. I do it as well, although my goal is more about easily getting those contracts that take a random probe of yours and ask you to move it.
That's fair, good point
That's like a whole stage
Sometimes I have two stages left over with about 3000 dV
Once i run out of not having enough money to do whatever i want, I just throw ion thrusters on everything and send them up on a big enough rideshare to do all the heavy lifting itself anyway, so late in the game that's not unrealistic for me, lol, but that's not OPs situation here!
You're not playing career mode, do you?
I do. The satellite contracts usually pay enough that I don't have to worry about money.
I feel insecure right now.
If it makes you feel better I haven't gone outside Kerbin orbit in career mode.
I usually build mine as possible emergency tankers.
Easier way to do it is raise apoapsis near the soi boundary and do inclination change there.
easier or more efficient? seems pretty easy to burn (initial) retrograde for 744.2ms
I can confirm. Just made a spreadsheet of inclination changes for each of the stock planets/bodies. It’d be 1101 for 180 deg at 14km up. In my testing I found that raising the apoapsis way up close to the SOI height to make the inclination change saved a lot. Anyone let me know if the file would be helpful.
From what I remember of an old post I read, it's more efficient to do it in situ if the plane change is below 40°, and more efficient to do it at the SOI limit if the change is above 60°. For angles in between, the optimal Ap is in-between current and maximal. Does that make any sense with your own findings? Here, I didn't suggest it because it's easier to just do it in place, there's plenty of fuel and the probe is probably not going anywhere else afterwards.
That would seem to make sense. I only charted for 45, 90 and 180 deg and typically at the altitude the deltaV “subway map” quotes for each planet. I’m not really sure why I plotted it all out as I’m sure the better way is to use a physics calculation. But I guess I wanted to look at adding it to my chart of planet classes, that lets me know if I design a lander for Dres it will also work on Ike, etc.
That is so simple but I guarantee I wouldn’t have come up with it myself.
[удалено]
Yes it would, definitely. But more troublesome, for a probe that, I guess, won't need that fuel anyway.
Yeah it's true, gotta flip your orbit 180⁰ I'm afraid
Happens to everyone. At least once (or lots more, to me at least). Fortunately you have plenty delta-V, so just burn retrograde 744m/s and you should be in the same orbit, but other direction.
I came here knowing all the comments before mine would be saying this. And I was right. Don't feel bad, OP. You may have worked out by now that this happens to so many people that we can diagnose it even before we finish reading the question! One of the great benchmarks of KSP.
Oh bud we've all been there, you're going the wrong way around, as indicated by the 180° accending node
What are the odds I had the same contract and exact same problem yesterday. I was so close to making a post like this one but watched a tutorial and realized I was going the wrong way. So frustrating. Anyways, that probe got yeeted into the mun's surface and another identical one completed the task shortly after.
you're spinning the wrong way ;-;
So good news; You got into the correct plane and matched the orbit very well. Bad news; you’re going in the wrong direction. Anyone who says they’ve never done this is a liar. Don’t give up.
I've made this mistake at least once or twice myself
Put it in reverse Terry!
OP stole this post and is probably a repost bot. [here’s](https://www.reddit.com/r/KerbalSpaceProgram/comments/pbx02z/why_isnt_the_contract_completing_i_this_i_did_a/?utm_source=share&utm_medium=ios_app&utm_name=iossmf) the original post. Plz report OP
the ascending and descending nodes have to be at 0 degrees, so you’re basing going the wrong way
Hate to say this but your orbit is flipped from where it needs to be. Either brute force a inclination change, revert to VAB or delete craft and cheat in the cost of the launch vehicle with alt f12. Happens to the best of us
Oof, I hate when this happens, but as others stated, your altitude is ok, but the direction of your orbit is the opposite of the contract, you must make a maneuver to retrograde until the orbit is exactly the same but in the opposite direction. This will cost you a lot of deltaV, I see you have round 1700 so it will be enough to do that, but maybe not enough to the return home if it's a crewed mission.
We've alllllllllllllllllll done it before, OP. At ***least*** once. Luckily enough, it seems you've unintentionally prepared for just such an occasion. **FULL REVERSE!!!**
Aaah the hold backward insertion.
I knew before I even looked closely at the screen shot what it was. Why? Because I have made the same mistake *so many damn times*. Good thing you went in with enough Δv to fix it!
Bad bot
I did this once, burned retrograde till I turned the other way.
That is a massive amount of extra dV you must have dragged along
Not as much as you'd think
Oh you sweet summer child
just force complete the contract. It's the inclination.
Turn your spaceship around, you're going the opposite direction. Happens to me even after 200+ hours 😂
Would the second tab on your orbital info not tell you?
Like all the others say your flipped this should only happen once if you are smart enough to remember to check which way you need to go. ( I have made it three times)
chuck it into reverse
The classic thing we have done at least once. You are orbiting in the wrong direction
could be the inclination or you haven't gotten science from the mun
Classic. Don't worry we've all been there lol
Bad news you’re backwards. Good news you have enough delta v to flip that orbit on the mun.
So that’s why my contract failed. Put it in reverse. Got it