Interceptor
Well-known member
Hi.I ,just started using TransX,and I can get to the moon just not over my base to land at. How do you do this? or do you use another MFD such as basesync to achieve this.Thanks:thumbup:
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TransX orbit lined up over suface base with TransX
- Thread starter Interceptor
- Start date
dgatsoulis
ele2png user
Hey Interceptor, greetings from Sparta.
First, congrats on being able to get from Earth to the Moon with TransX!
Now... to your question, why not try something much simpler?
Open Orbit MFD (ref moon) on one side and Map MFD on the other.
When you reach moon's SOI (G=0.40 on orbit MFD, so that your trajectory is projected on map MFD) turn your ship "Orbit normal +" or "Orbit normal -" and apply some thrust. Watch Map MFD. If your orbital plane starts to move towards the base you want to go... then keep doing it until it crosses over it! If not.. then turn the other way around.
Moon's slow rotation (aprox 28 days) means that you don't have to worry about "shooting ahead or before" your target.
If you 're accustomed with IMFD i can tell you an easy way to bring your ship on an orbit that passes over the base you want to land AND at a desired altitude!
First, congrats on being able to get from Earth to the Moon with TransX!
Now... to your question, why not try something much simpler?
Open Orbit MFD (ref moon) on one side and Map MFD on the other.
When you reach moon's SOI (G=0.40 on orbit MFD, so that your trajectory is projected on map MFD) turn your ship "Orbit normal +" or "Orbit normal -" and apply some thrust. Watch Map MFD. If your orbital plane starts to move towards the base you want to go... then keep doing it until it crosses over it! If not.. then turn the other way around.
Moon's slow rotation (aprox 28 days) means that you don't have to worry about "shooting ahead or before" your target.
If you 're accustomed with IMFD i can tell you an easy way to bring your ship on an orbit that passes over the base you want to land AND at a desired altitude!
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Interceptor
Well-known member
Thanks dgatsoulis.I have that down with IMFD,I am now trying out TransX,but thanks for the help.hribek when do you use the encounter plan, and how?all the tutorials I have downloaded just get you to the moon, or planets orbit, Your procedure please.Hey Dambuster how do you use BaseSync with airless planets ? I thought you could not.
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Alignment on estimated periapses
Hi,
the problem is, that you can use MAP-MFD only if the Moon is the nearest body. BaseSync can only used if you where in orbit around the Moon. TransX only shows the current alignment, but not the alignment on periapse, so you have to do corection burns all the time. The "base approach program" from IMFD don't work on far distance, i think because it don't integrate your flight track!?
My quetion is, is there any MFD to align your plane over the target base verry early, in the best case, just after TLI? I think that this is the most efficient way to save fuel!?
[edit]
i have think about that a little and the problem that you are not in orbit on apoapsis can be solved, if you assume that your orbit will be circulated on apoapsis!?
(I hope you can understand what i will say ;-) )
Hi,
the problem is, that you can use MAP-MFD only if the Moon is the nearest body. BaseSync can only used if you where in orbit around the Moon. TransX only shows the current alignment, but not the alignment on periapse, so you have to do corection burns all the time. The "base approach program" from IMFD don't work on far distance, i think because it don't integrate your flight track!?
My quetion is, is there any MFD to align your plane over the target base verry early, in the best case, just after TLI? I think that this is the most efficient way to save fuel!?
[edit]
i have think about that a little and the problem that you are not in orbit on apoapsis can be solved, if you assume that your orbit will be circulated on apoapsis!?
(I hope you can understand what i will say ;-) )
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astrosammy
Dash!
Interceptor
Well-known member
Thanks for the advice Guys,I am in Florida right now but when I get back I.ll give it a try.
Andy44
owner: Oil Creek Astronautix
TransX will tell you how to align your plane in 3-space, but it's up to you to make sure your base is in that plane when you get there.
flytandem
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TransX is fine for planning the arrival at the moon to be in plane with your base. It isn't terribly accurate due to the rotation of the moon especially if you are taking a 3 or 4 day journey to get there. But the error is relatively small plus it's easy to estimate the error and compensate for it even while planning the ejection burn from the Earth.
Like someone said above, you need to open Map and and target your base on the moon. You first would need to reference Moon then Target .... whatever base you want to arrive over.
Then plan your ejection burn from Earth, and forward to Moon centered stage.
I find it easiest to fine tune the planned burn if the moon stage has graph projection set to focus. You will see the dashed yellow line from the center of the moon going out to the base. As you adjust the variables of the ejection burn, you can see the location of the base at your arrival at the moon. You will want it to point out to the outer circumference with this graph projection bedause this is what it will look like if you are arriving in plane with the base. Also in encounter view you will be shown the actual value of the amount you are offplane.
What I do to estimate the error is first to reduce the offplane to a very low value like 100 meters or so. At that point you will see which way the change caused by moon rotation is going. Then push the value out maybe a couple hundred Km in the correct direction so that it will be decreasing toward zero while you are enroute to the moon.
Each time you do a mid course correction take into account the arrival offplane value. The value in TransX gets more accurate the closer you get to the moon.
Want a fun challenge... start with an ejection that has you planning to go to an orbit that passes over your base, then when 2/3rds the way to the moon, change the plan, using a mid course correction, to a free return back to Earth.
Like someone said above, you need to open Map and and target your base on the moon. You first would need to reference Moon then Target .... whatever base you want to arrive over.
Then plan your ejection burn from Earth, and forward to Moon centered stage.
I find it easiest to fine tune the planned burn if the moon stage has graph projection set to focus. You will see the dashed yellow line from the center of the moon going out to the base. As you adjust the variables of the ejection burn, you can see the location of the base at your arrival at the moon. You will want it to point out to the outer circumference with this graph projection bedause this is what it will look like if you are arriving in plane with the base. Also in encounter view you will be shown the actual value of the amount you are offplane.
What I do to estimate the error is first to reduce the offplane to a very low value like 100 meters or so. At that point you will see which way the change caused by moon rotation is going. Then push the value out maybe a couple hundred Km in the correct direction so that it will be decreasing toward zero while you are enroute to the moon.
Each time you do a mid course correction take into account the arrival offplane value. The value in TransX gets more accurate the closer you get to the moon.
Want a fun challenge... start with an ejection that has you planning to go to an orbit that passes over your base, then when 2/3rds the way to the moon, change the plan, using a mid course correction, to a free return back to Earth.
Interceptor
Well-known member
Wow! that's a cool idea flytandem,I will try that.:tiphat:
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