It takes 850 m/s deltaV for a free return transfer orbit to Mun, starting from low Kerbin orbit. That will get you exactly where you want to be.Īs for fuel, you can calculate how much fuel you need ahead of time so you never get stuck running out of fuel. ^^Use maneuver nodes for all your burns: circularization in kerbin orbit, transfer to Mun, braking burn / circularization at the mun. Switch to the target ship, point it straight at your ship, then switch back to the original ship and use RCS to get in there and dock. Using RCS if close, or main engine if still some distance away, and forget all about orbital mechanics. The burn is still directed at prograde or retrograde! Don't burn relative to the target. At the point of closest pass burn to achieve 0 relative velocity with the target.
You want to stay with the target, right? Switch 8-ball to target mode. Don't overcook the burn or you'll spoil the encounter. Again, eyeball how fast the encounter nodes get closer and closer after each orbital period and how close they get on your last orbit prior to Hohmann's, and you'll have a pretty good idea where, along that orbit to place the maneuver node.īurn. Eventually you'll get pretty good with judging where to place the maneuver node and it will only take minor tweaking to get it right.
Place a maneuver node and tweak it (both the deltaV and the placement of the maneuver node) until you get a really close encounter ideally 0.2 KM but up to 0.5 is okay. Stop time accelerate as soon as you see the encounter nodes get closest. (One more orbit after that and you would have passed your target and spoiled the rendezvous?) That's the orbit on which the encounter is possible. Note how closer the encounter nodes got after one period? From there you can infer how many more periods would it take until the encounter nodes got closest. Orbit there once around in time accelerate. (This second, just in case the circ burn above isn't perfect and screws up your plane.) (You can also go lower orbit but that prevents faster time accelerate most times.) Yes it wastes fuel but so what? It saves time, and that's a real actual commodity we truly care about. For example if your target is in 100x100 Kerbin orbit, shoot for at least 150x150. So much (real) time wasted instead of building cool things that blow up.įor an odd docking it actually isn't bad at all.Ĭircularize in an orbit significantly higher than your target. ^^Tedious if you are building a space station and need to do them over and over and over. Try Bop or Pol, they are tiny and need only 2-300 dV to take off from, rendezvous and dock in lower orbit to get home again. If you want to return it gets a bit trickier, some need 3k dV just for take off. Gravity is insane there, you need 4k dV to stop yourself from an orbit with no atmosphere to help you slow down. If you go to Jool and accidentally capture around Tylo, don't try to go ahead and land on it. This can also be applied to Jool, add a 3k dV transfer to Laythe and aerobrake yourself into a landing. Gilly is easy because you can aerobrake on Eve's capture so you don't slingshot out of the system again, and gravity is low. If you plan your transfer on, you can do a transfer to almost anything with less than 2k dV leaving you plenty to land on anything. Where should I go next? Are there any Joolian moons small enough to land on and return with 3000 dV? I have a mothership in orbit around Mun with deltaV of 6000, and two landers attached, each with a deltaV of about 3000. Now that we've derailed this topic sufficiently. Nope, just another internet Ars meme thing. I'll just drop unmanned probes onto the munar surface and spam the transmit butan. So the last alternative is to attach a remote control to all manned landers (or to equip all landers with kerbal spam in a can) and to drop the landers from Kerbin orbit individually. When the chute deploys at 500m height, the landers are always ripped to pieces since they are near instantly slowed down from +200 m/s to 7 m/s. That also didn't work since no air drag calculations are done on objects outside of the controlled aircraft. So I tried an alternative of attaching parachutes to the landers and detach them in the atmosphere. Secondly, I discovered that the docking modules with which the landers are connected to the mothership are too flimsy to survive re-entry. Firstly, docking without MJ is a painfull chore. I wanted to return surface samples back to Kerbin for maximum science. In other news, I tried to build a shotgon mothership with manned landers for the mun. I always use the bog standard docking coupling module for radially attaching probes/landers. Maybe 16-32 small probes radially attached to the upper stage. How do I radially attach probes? I want to drop a multi-probe mission to shotgun Mun.
0 kommentar(er)
