Cant get back from Dres :O

[Robbii6]

First time to Dres ever!! used http://ksp.olex.biz/ To get the right angles and then i make a manover node to get back and it says when i get there Kerbin is the opposite side of the sun to what i need it to be. I would just go with it but i dont have fuel to spare. DV maps tell me i need so much DV and i have just below that so im fudged with that one. But im still gonna try. So yeah i need help on why kerbin is on the opposite side to what iit should be.

Thankyou!!

Edited April 17, 2014 by sal_vager
Language people.

[FenrirWolf]

I ran into a similar problem when I did my first Dres mission a few weeks back.

When you're transferring from a distant, slow moving outer planet to a faster moving inner planet, small changes in your phase angle will make a world of difference. Try adjusting the angle of your node and tweaking your departure speed to compensate, and you should find that you can generate a proper encounter without much deviation from the expected delta-v requirements. Those small tweaks you make will mark the difference between Kerbin being on one side of its orbit or the other by the time you reach your closest approach.

[Robbii6]

Ah right ok, nice ill give it a try now.

[FenrirWolf]

Hope you make it work. I had to send Jeb over with a bunch of fuel to bail out the guys in my own Dres mission, lol

My backup plan if that failed would have been to transfer to Duna instead and have someone meet up with them there.

[Taki117]

Might I suggest crosschecking your numbers with This Site (Mmmmm....Pork Chops) it even takes into account aerobraking.

[Robbii6]

hmmm can get anything to work :'( going to have to send a rescue team with fuel. They'll be in the confined space for a couple more years.

Edited April 17, 2014 by Robbii6

[Robbii6]

OK,

Ive just realised this is a bigger rescue mission than i thought. I dont have any docking on in in-need-of-rescue ship. if i take them home on a different ship i wont get the science back. I cant transmit it either because i didnt put any transmitter for the reason i thought i would make it back. So the plan is to send a asteroid grabber thingy and push the ship back home. Hopefully that should work.

[Rakaydos]

OK,

Ive just realised this is a bigger rescue mission than i thought. I dont have any docking on in in-need-of-rescue ship. if i take them home on a different ship i wont get the science back. I cant transmit it either because i didnt put any transmitter for the reason i thought i would make it back. So the plan is to send a asteroid grabber thingy and push the ship back home. Hopefully that should work.

Cant you just pull the science from the intriments, and EVA over to the other ship to store it in the rescue capsue?

[Superfluous J]

Cant you just pull the science from the intriments, and EVA over to the other ship to store it in the rescue capsue?

Yeah so long as you have (or bring) a Kerbal you can get all the science via EVA.

Or bring a claw, which makes a fine docking port in a pinch.

[cantab]

So yeah i need help on why kerbin is on the opposite side to what iit should be.

Are you measuring the angles correctly?

Are you waiting for the appropriate launch window (based on the desired phase angle) then setting up your manouevre node, and not vice versa?

Have you put yourself in a retrograde or highly-inclined orbit around Dres?

[Nemecle]

Do you think you are enough skilled and patient to try a gravity assist with Jool or Duna ?

[Robbii6]

ha ha ha ha ha...... errr... no. Yeah i give up. even the rescue mission went to s***

[technion]

I wonder if there's a problem with Alexmoon and Dres in the current KSP version. I just made the same trip on my new career mode, and Kerbin was literally 180 degrees away from where I intersected its orbit. That was no small change to correct, and I used PreciseNode to get that ejection perfect.

[Rokker]

DV maps tell me i need so much DV and i have just below that so im fudged with that one.

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Edited April 19, 2014 by Rokker

[FenrirWolf]

I'd try transferring to Duna if you can pull it off. It should cost less delta-v to go there vs Kerbin, and it will be a lot easier for a rescue ship to meet up there than at Dres itself.

[MarvinKitFox]

Also, make very sure that the tool you are using for calculating your interplanetary transfer dates is working in the same units of measure as your clock.

Since .23.5, your KSP clock can run in both Kerbal and Hyooman days, which differ very much from each other.

[RockoDyne]

Well, if you have any amount of fuel and you can get or have an ascending or descending node on the orbit of kerbin (it's actually easier to do this if you aren't on its inclination plane), you can use that node as the place you will rendezvous. The idea is you get to that node on kerbin's orbit and burn either prograde or retrograde and move the closest approach on to that node (and depending on how close the node is, you can easily get an encounter).

You can easily get away with 30 m/s total burns this way (do you have any monoprop?). You may have to go around on several orbits to get a decent closest approach (and one more after you burn on the node), so you trade off time for fuel conservation.

[Rokker]

Now I dont feel like this is the issue, but it could be. Could the inclination and eccentricity of Dres be affecting it since the olex calculator doesn't take those into account?