flytandem
Tutorial Publisher
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- Oct 19, 2007
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Here's a fun scenario that I haven't flown yet. Leave Earth 2 hours from the time of this posting, but you should launch at scenario start.
You sling Venus going to Mars. You'll need to do an inverted flight aerobrake to land at Mars. There is a 3 week planned stay on Mars surface before heading back and the total time from departing Earth to returning to Earth is less than 18 months.
Please excuse the departure location of Southern California. I planned it using my home base and since the launch window is just 2 hours away, there was no time to airlift the DG to the Cape. Since you probably don't have a base here, just accelerate east across the desert for launch.
---------- Post added at 02:37 PM ---------- Previous post was at 08:21 AM ----------
Had so much fun making then flying the scenario above I decided to look for future similar windows. Found one in 2017 but it barely worked and took more than 18 months for the trip. But then in 2023 there was another one. The following are a pair of scenarios... they start the same with same launch ands sling of Venus, but the first one is a landing for a month on Mars with eject plan all set up for the return to Earth. The second in the pair is with an abort of the landing and uses gravity sling from Mars to return to Earth a couple of months sooner than the landing scenario. One could imagine coming in toward Mars and then deciding which way to finish the flight... a landing with a month's stay or an abort and flyby a few hundred Km above Mars surface.
And the abort landing scenario...
---------- Post added at 07:08 PM ---------- Previous post was at 02:37 PM ----------
Going out on a limb here because I have no clue about real life needs in rocket science including the strategies of going to Mars. But it struck me that the above two scenarios of a flight that could choose to land or sling home, could be followed (chased) by a second robotic cargo ship that is designed to only sling and allow supplies to the crew in event they chose to land. The chase ship would also have the heat shield for Earth re-entry.
I found a scenario that start 4 days after the first ship but because of the eject it arrives for its sling 14 days after the landing. The idea is for the landing craft to launch and eject as the supply ship passes Mars and dock with it in the hours after its eject from Mars. This way the landing craft doesn't have to pull many months of supplies, and Earth re-entry hardware up with it from the surface and accelerated up to eject speeds.
Remember, these scenarios are for navigation purposes only. They are just the DG so no fancy cargo addon has been created or utilized.
Here's the supply ship...
And since it passes a bit sooner than the original landing scenario, I have redone the landing scenario to have an identical Mars to Earth plan. This way the launch from Mars can be less stringent and be allowed to not be oriented with the passing cargo ship. Even if it's of different eject orientation it will on the same eject plan and be able to dock up probably within a day or two.
The revised landing scenario...
You sling Venus going to Mars. You'll need to do an inverted flight aerobrake to land at Mars. There is a 3 week planned stay on Mars surface before heading back and the total time from departing Earth to returning to Earth is less than 18 months.
Please excuse the departure location of Southern California. I planned it using my home base and since the launch window is just 2 hours away, there was no time to airlift the DG to the Cape. Since you probably don't have a base here, just accelerate east across the desert for launch.
Code:
BEGIN_DESC
Mars and back in under 18 months. Includes a sling of Venus going to Mars and a 3 week stay on MMars before returning home. Scenario start has the ship parked in Southern California. Head due east across the desert for launch.
END_DESC
BEGIN_ENVIRONMENT
System Sol
Date MJD 55531.7648890951
END_ENVIRONMENT
BEGIN_FOCUS
Ship 3
END_FOCUS
BEGIN_CAMERA
TARGET 3
MODE Cockpit
FOV 60.00
END_CAMERA
BEGIN_HUD
TYPE Docking
NAV 0
END_HUD
BEGIN_MFD Left
TYPE User
MODE TransX
Ship 3
FNumber 7
Int 1
Orbit True
Vector -3519610.48814 4841837.31776 -2181456.98267
Vector 286.391362002 101.922303163 -235.849175363
Double 3.98600439969e+014
Double 55531.7648891
Handle Earth
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Finvars
Finish BaseFunction
Int 2
Orbit False
Handle Sun
Handle Earth
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Int 4
Orbit True
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Vector 9349.66002658 -357.858692987 -4709.54780962
Double 3.2485863e+014
Double 55678.7804479
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Handle NULL
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END_MFD
BEGIN_MFD Right
TYPE User
MODE TransX
END_MFD
BEGIN_SHIPS
3:DeltaGlider
STATUS Landed Earth
POS -117.2601388 34.0891835
HEADING 90.00
RCSMODE 0
AFCMODE 7
PRPLEVEL 0:1.000000 1:1.000000
NAVFREQ 0 524 84 114
XPDR 6
GEAR 1 1.0000
PSNGR 2 3 4
TRIM 1.000000
AAP 0:0 0:0 0:0
END
END_SHIPS---------- Post added at 02:37 PM ---------- Previous post was at 08:21 AM ----------
Had so much fun making then flying the scenario above I decided to look for future similar windows. Found one in 2017 but it barely worked and took more than 18 months for the trip. But then in 2023 there was another one. The following are a pair of scenarios... they start the same with same launch ands sling of Venus, but the first one is a landing for a month on Mars with eject plan all set up for the return to Earth. The second in the pair is with an abort of the landing and uses gravity sling from Mars to return to Earth a couple of months sooner than the landing scenario. One could imagine coming in toward Mars and then deciding which way to finish the flight... a landing with a month's stay or an abort and flyby a few hundred Km above Mars surface.
Code:
BEGIN_DESC
Depart Earth in 2023, sling Venus to Mars with landing for 1 month. Then return to Earth.
END_DESC
BEGIN_ENVIRONMENT
System Sol
Date MJD 60192.7016381475
END_ENVIRONMENT
BEGIN_FOCUS
Ship 3
END_FOCUS
BEGIN_CAMERA
TARGET 3
MODE Cockpit
FOV 60.00
END_CAMERA
BEGIN_HUD
TYPE Docking
NAV 0
END_HUD
BEGIN_MFD Left
TYPE User
MODE TransX
Ship 3
FNumber 7
Int 1
Orbit True
Vector -2562870.58569 1448893.69607 5649973.68008
Vector -335.978394357 75.2843444041 -171.708438177
Double 3.98600439969e+014
Double 60192.7016378
Handle Earth
Handle NULL
Handle NULL
Select Target
0 Escape
Autoplan
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Plan type
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Plan
0 1
Plan
0 0
Plan
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Select Minor
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Man. date
0 60192.7016378
Outward vel.
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Ch. plane vel.
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Intercept with
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Advanced
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Pe Distance
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Ej Orientation
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Equatorial view
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Finvars
Finish BaseFunction
Int 2
Orbit False
Handle Sun
Handle Earth
Handle Venus
Select Target
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Finvars
Finish BaseFunction
Int 4
Orbit True
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Vector -2632.38860668 2038.83847251 -10660.1026136
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Handle Venus
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Vector 35764.8653578 -921.240422564 -17301.1921945
Double 1.32712764814e+020
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Handle Sun
Handle Venus
Handle Mars
Select Target
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Plan
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Finvars
Finish BaseFunction
Int 4
Orbit True
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Vector 2902.48005943 -467.28168091 -6105.25460334
Double 4.28282991638e+013
Double 60472.3355992
Handle Mars
Handle NULL
Handle NULL
Select Target
0 Escape
Autoplan
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Plan type
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Plan
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Plan
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Int 2
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Handle Mars
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Int 5
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END_MFD
BEGIN_MFD Right
TYPE User
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END_MFD
BEGIN_SHIPS
3:DeltaGlider
STATUS Landed Earth
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HEADING 90.00
RCSMODE 0
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END
END_SHIPS
Code:
BEGIN_DESC
Leave Earth in 2023 for a sling of Venus to Mars and sling of Mars back to Earth.
END_DESC
BEGIN_ENVIRONMENT
System Sol
Date MJD 60192.7046226006
END_ENVIRONMENT
BEGIN_FOCUS
Ship 3
END_FOCUS
BEGIN_CAMERA
TARGET 3
MODE Cockpit
FOV 60.00
END_CAMERA
BEGIN_HUD
TYPE Docking
NAV 0
END_HUD
BEGIN_MFD Left
TYPE User
MODE TransX
Ship 3
FNumber 7
Int 1
Orbit True
Vector -2649054.57675 1468630.32814 5604947.45521
Vector -332.393489703 77.776647248 -177.47778121
Double 3.98600439969e+014
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Handle Earth
Handle NULL
Handle NULL
Select Target
0 Escape
Autoplan
0 0
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Plan
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Select Minor
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0 0
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0 0
Man. date
0 60192.7046226
Outward vel.
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Finish BaseFunction
Int 2
Orbit False
Handle Sun
Handle Earth
Handle Venus
Select Target
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Plan
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Plan
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Finish BaseFunction
Int 4
Orbit True
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Orbit True
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Handle Mars
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Int 5
Orbit True
Vector -4989082981.12 -639886288.427 7849693028.07
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Handle Earth
Handle NULL
Handle NULL
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END_MFD
BEGIN_MFD Right
TYPE User
MODE TransX
END_MFD
BEGIN_SHIPS
3:DeltaGlider
STATUS Landed Earth
POS -117.2601388 34.0891835
HEADING 90.00
RCSMODE 0
AFCMODE 7
PRPLEVEL 0:1.000000 1:1.000000
NAVFREQ 0 524 84 114
XPDR 6
GEAR 1 1.0000
PSNGR 2 3 4
TRIM 1.000000
AAP 0:0 0:0 0:0
END
END_SHIPS---------- Post added at 07:08 PM ---------- Previous post was at 02:37 PM ----------
Going out on a limb here because I have no clue about real life needs in rocket science including the strategies of going to Mars. But it struck me that the above two scenarios of a flight that could choose to land or sling home, could be followed (chased) by a second robotic cargo ship that is designed to only sling and allow supplies to the crew in event they chose to land. The chase ship would also have the heat shield for Earth re-entry.
I found a scenario that start 4 days after the first ship but because of the eject it arrives for its sling 14 days after the landing. The idea is for the landing craft to launch and eject as the supply ship passes Mars and dock with it in the hours after its eject from Mars. This way the landing craft doesn't have to pull many months of supplies, and Earth re-entry hardware up with it from the surface and accelerated up to eject speeds.
Remember, these scenarios are for navigation purposes only. They are just the DG so no fancy cargo addon has been created or utilized.
Here's the supply ship...
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END_SHIPSThe revised landing scenario...
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