Dres Rover. Aborted
Apr. 11th, 2024 06:10 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
the_sky_callsThe Trip Planner suggests the following for a Dres lander or rover:
(930 ejection + 1,620 insertion + 1300 low orbit) + 20% = 4,620 m/s
430 m/s descent + 30% = 559 m/s
The rover/lander I built for Moho has 1,178 m/s so I’ll just go with that. And then the transfer stage with 5,009 m/s that I came up with should be more than enough. Except that I didn’t take the possible 1,010 m/s for an inclination change into account. That leaves me at least 200 m/s short and potentially much more.
Doesn’t matter now, though, because I went into map view to look at things and the orbits were way off.
The Alarm Clock mod indicated that the launch window to Dres would be on Year 2, Day 119. Dres should be at 82.1 degrees relative to Kerbin, that is, with Kerbin at the 6:00 position, Dres should be just short of the 3:00 position. But looking in the Tracking Station, Kerbin has just passed opposition with Dres. Alarm Clock is way off.
Going to the Alexmoon Launch Window Planner website, if it is a year off like the forums say, it has the launch window happening at Day 341. That might be more right. But I don’t think I can really trust either of them anymore. I have had a number of prior instances where things just didn’t line up quite right. I think I’m going to have to move to the protractor method.
Alarm Clock says that Eve is coming up on a launch widow at Day 139 but looking at the Tracking Station it looks to be happening sooner than that. Again, I’m going to start using a protractor.
And not just holding up a protractor to the screen. I’m going get get a transparency sheet that I can set on my screen and line up all the launch windows. I’ll still be using Alarm Clock but I am definitely going to be confirming with the protractor and cross referencing with Launch Window Planner.
(930 ejection + 1,620 insertion + 1300 low orbit) + 20% = 4,620 m/s
430 m/s descent + 30% = 559 m/s
The rover/lander I built for Moho has 1,178 m/s so I’ll just go with that. And then the transfer stage with 5,009 m/s that I came up with should be more than enough. Except that I didn’t take the possible 1,010 m/s for an inclination change into account. That leaves me at least 200 m/s short and potentially much more.
Doesn’t matter now, though, because I went into map view to look at things and the orbits were way off.
The Alarm Clock mod indicated that the launch window to Dres would be on Year 2, Day 119. Dres should be at 82.1 degrees relative to Kerbin, that is, with Kerbin at the 6:00 position, Dres should be just short of the 3:00 position. But looking in the Tracking Station, Kerbin has just passed opposition with Dres. Alarm Clock is way off.
Going to the Alexmoon Launch Window Planner website, if it is a year off like the forums say, it has the launch window happening at Day 341. That might be more right. But I don’t think I can really trust either of them anymore. I have had a number of prior instances where things just didn’t line up quite right. I think I’m going to have to move to the protractor method.
Alarm Clock says that Eve is coming up on a launch widow at Day 139 but looking at the Tracking Station it looks to be happening sooner than that. Again, I’m going to start using a protractor.
And not just holding up a protractor to the screen. I’m going get get a transparency sheet that I can set on my screen and line up all the launch windows. I’ll still be using Alarm Clock but I am definitely going to be confirming with the protractor and cross referencing with Launch Window Planner.
