Why is Mech jeb's Rendezvous so slow?

[lukeoftheaura]

Mechjeb wants to do 2 days of phasing orbits. WHY??

[LitaAlto]

I'd imagine phasing orbits are more fuel-efficient than burning delta-V to avoid them, but I have no hard stats to back that up.

[Axelord FTW]

d/v efficiency.

Especially in low orbit, there's a limit to how quickly you can rdv with a target.

[kerbiloid]

Because MechJeb authors would add an editable parameter: Expectation Time Limit.

And would restrict any optimization calculations with this value.

It's no problem to wait 5-10 turns around Kerbin, but it's funny when a ship makes 10 turns around the Kerbol star to save 10% of fuel.

[lukeoftheaura]

Because MechJeb authors would add an editable parameter: Expectation Time Limit.

And would restrict any optimization calculations with this value.

It's no problem to wait 5-10 turns around Kerbin, but it's funny when a ship makes 10 turns around the Kerbol star to save 10% of fuel.

Mine wants to do 25 phasing orbits around eve. it takes AGES!

[maltesh]

Mechjeb wants to do 2 days of phasing orbits. WHY??

Because you put yourself into an orbit pretty close in period to your target's orbit, and the closer in period the two orbits are, the longer it's going to take your target to lap you, or vice versa. Resulting in extremely long tomes before both you, and your target are in the position where a Hohmann transfer will take you to your target's orbit at a time when the target's there.

[sarbian]

Because MechJeb authors would add an editable parameter: Expectation Time Limit.

And would restrict any optimization calculations with this value.

It's no problem to wait 5-10 turns around Kerbin, but it's funny when a ship makes 10 turns around the Kerbol star to save 10% of fuel.

It's there already. "Max # of phasing orbits"

The "get me here now" that you want is not a rendezvous. Plot a transfer in the Maneuver Planner

Mine wants to do 25 phasing orbits around eve. it takes AGES!

Provide a screenshot of the Rendezvous UI open with that 25 phasing orbits and we'll talk about it. And a save while you're at it.ax

MJ is not here to prevent you to learn about orbital mechanics. There may be bug, but I'll doubt it until I see more than a rant.

maltesh provide a clean explanation of what is going on.

[kerbiloid]

It's there already. "Max # of phasing orbits"

Wow! Then MechJeb is even more amusing than I thought.

It's really fine to discover this option, indeed. I would better look for it.

Thank you very much for this mod, it's really cool!

[John FX]

It would be good to be able to set the Max # of orbits to be less than 5 though. Or maybe a separate option for a single rendezvous burn where you go into a very elliptical orbit that meets your target at the next Pe.

It would not be the most efficient but it`s fastest.

[sarbian]

The problem is that when you lower that limit you have to handle a lot more edge case (like not going Through a planet). I could try to lower it but keep the warning, I'll test.