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Found 7 results

  1. So far all the moons in the Kerbal system orbit the same direction around a planet. We need some variety. I think it would be great if some moons orbited in a different direction than others. That is, some moons orbit retrograde while others orbit prograde. This would work especially well with Jool's moons, since Jool has the most moons of any planet in the Kerbal system and Jool's real-life counter part, Jupiter, has moons that orbit in opposite directions. This might complicate achieving encounters with some moons, but i think we all enjoy a challenging mission. The orbits of Jupiter's satellites (above)
  2. Hey folks, I could use some help/input from anyone who likes a healthy dose of math and physics! I'm building a base on the Mun with a lab and mining/ISRU capabilities. The idea is to use a shuttle to hop around and collect science, then bring it back to the lab and fill up the tanks on the shuttle. So a common problem I have is figuring an efficient path from base to destination (and back). Right now I basically just point in whatever feels like the right direction, give myself some altitude, and burn prograde until my trajectory I comes down in the right area. I got curious about the optimal ways to do this, so I posted on Reddit to see if anyone knew of an existing tool/calculator that would be of use. Not learning of one, I thought it might be a fun exercise to give the math a shot myself. We've begun with a simplified problem: (1) no drag/atmosphere, (2) perfectly spherical planet, (3) non-rotating planet. I'd like to try tackling 2 and 3 as well (1 is more than I want to bite off), but we'll see where it goes. Anyways, the optimal case seems to be an elliptical orbit with initial and final locations located on the latus rectum of the second focus. This geometry minimizes the semi-major axis and thus orbital energy. I've put everything so far in a spreadsheet: https://docs.google.com/spreadsheets/d/1JIUHIAujZuQdvPRIo-FTho82QcEqVLeuRe-lLiM_b-I/edit#gid=0. The next step I'm trying to solve is how to determine alpha, the pitch angle for the initial burn. We've got an equation that solves it for the optimal case, but I'm struggling to work out a general equation for any sma/eccentricity. With that problem solved you'll be able to input a minimum apoapsis in order to clear terrain/obstacles. If I can get that done, I'll look next differing elevations and then a rotating body. Just a note on terms... I've been using θ to represent the angle between initial/final location (measured from center of planet), and α to represent the pitch (flight path) angle for the burn. If anone wants to catch up on the discussion we've had so far, here it is: https://www.reddit.com/r/KerbalAcademy/61tm0f. I wanted to move the discussion here, partly because a forum format is more useful in this case and partly because I'm hoping to get some new voices involved. If you can contribute I'd love the help! Bonus points if you take the end results and turn them into a program or mod.
  3. Hi all, I am having trouble grasping a concept here. In the picture I have a sat at 90^ 300km. The highlighted blue orbit is 45^ at the same height. What do I need to do to have the line sit at the red circle? Thanks in advance, Kerbal007
  4. I'm doing this contract to put a probe in to orbit, the orbit looks pretty much perfect to me ( i know the periapsis and apoapsis are a bit off , thats becasue i was trying to find the problem before my fuel ran out). It says the inclination should be 154.7 degrees in the contract but mechjeb says it is 25 degrees or so, and honestly i don't know what that really means. Do i need the probe to be going in the opposite direction or something?
  5. I'm currently trying to pass that next great milestone in every KSP player's career: my first landing and return from another planet. In this case the planet is Duna, but here's my problem. Whenever I do my interplanetary transfer and encounter Duna I end up with a periapsis well below or above Duna. This means that I would have to expend a ton of fuel to achieve an equatorial orbit. Is there a better way to do this? Is there a way to angle my ejection burn so that I match Duna's orbital inclination or do I have to do a mid-course correction (not looking forward to the dV required for a plane change with an orbit that size I can tell you)?
  6. Are there any advantages of Orbit direction at Kerbin's Mun? If yes please explain why ********************* Thank you all for the help and all answers are good ones, I think we have enough here to satisfy the question given.
  7. So I've finally parked my first station around Minmus. It's got everything I'll want from it later: two orange tanks, lots of docking ports, plenty of monoprop and EC. Even got a nice contract to put it there (I would've done so anyway, it's my interplanetary refueling station now.) Thing is, I can't seem to get it's orbit fully equatorial. 5.3 degrees is the closest I can get, and I can't seem to find any combination of burns that get it closer. The maneuver nodes are useless because they don't show me the AoI. KER doesn't help much, it only tells me where I'm at, not how to get where I want to go; nor does it show the stats of the node's orbit... Any advice on finding equatorial orbits on my own?