Scenario 2010_EVVEJSN

flytandem · Jul 16, 2010

I was noticing that Venus' position was coming around again and thought there could be another inner to outer sling possibility. (there almost always is). Last evening I found and flew one (EVVEJN, no saturn) but it had me ejecting and almost hitting the moon which sent the craft quite a bit off course. So I redid the date and came up with this Earth, Venus, Venus, Earth, Jupiter, Saturn and Neptune parade. The tough part was the 030 heading launch from Habana. I chose a heading of about 26 to 27 degrees to compensate for the Earths rotation. Note that the orbits to icept on the trip from Venus to Earth should be set to "2". It sometimes slips down if off course.

Code:

BEGIN_DESC
Sitting at Haban ready to launch. TransX plan all up for a flight to Venus, Venus, Earth, Jupiter, Saturn, Neptune. 
END_DESC

BEGIN_ENVIRONMENT
  System Sol
  Date MJD 55412.0771769403
END_ENVIRONMENT

BEGIN_FOCUS
  Ship 3
END_FOCUS

BEGIN_CAMERA
  TARGET 3
  MODE Cockpit
  FOV 60.00
END_CAMERA

BEGIN_HUD
  TYPE Surface
END_HUD

BEGIN_MFD Left
  TYPE User
  MODE TransX
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  FNumber 14
  Int 1
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  Vector  417.406637831 36.7315893307 -85.8001087583
  Double  3.98600439969e+014
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Finvars
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  Int 2
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  Handle Sun
  Handle Earth
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  Vector  -33820.3268609 2184.80368566 23029.4966452
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  Vector  -10269.6335786 554.399640627 -2799.52681202
  Double  3.2485863e+014
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  Handle Venus
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  Handle Earth
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END_MFD

BEGIN_MFD Right
  TYPE User
  MODE TransX
END_MFD

BEGIN_SHIPS
3:DeltaGlider
  STATUS Landed Earth
  POS -82.4257483 22.9796395
  HEADING 60.04
  RCSMODE 0
  AFCMODE 7
  PRPLEVEL 0:1.000000 1:1.000000
  NAVFREQ 484 94 0 0
  XPDR 8
  GEAR 1 1.0000
  TRIM 1.000000
  AAP 0:0 0:0 0:0
END
END_SHIPS

Tex · Jul 16, 2010

Will give this a go tonight!

flying coffin · Jul 20, 2010

It seems to me that every time venus comes around, which is a bit more often than once a year, there must always be an EVVE, and an EVEE sling available, correct?

flytandem · Jul 20, 2010

flying coffin said:
It seems to me that every time venus comes around, which is a bit more often than once a year, there must always be an EVVE, and an EVEE sling available, correct?

Yes there is always a chance at EVVE. The trick it seems is to get the slings to point the throw at Jupiter after the inner sling wind-up. That is why this one did a 2 orbit wait after the second Venus encounter. "i was in the right place..... but it must-a been the wrong time"

---------- Post added at 11:07 AM ---------- Previous post was at 08:25 AM ----------

I tweaked the departure date and direction a little bit and found a grand tour with EVVEJSUN (all the planets other than Mercury and Mars). But it does take a while with a total of 30 years to get from Earth launch to Uranus and another 90 years or so from Uranus to Neptune. During that time it floats out to the Kuiper belt. It could likely do reverse slings of the planets to come back to Earth.

Kuiper belt sample return?? While at the Ap of the orbit going from Uranus to Neptune the relative speed with kuiper objects would probably average on the order of about 1200 to 1300 m/s. Not huge. Too bad there are no kuiper objects in the sim to play with.

Orbiter 2010 has the option to set time steps so running this flight could be a 1/2 day project not a week long project.

Adelanthal · Aug 25, 2010

Been trying out this run... am I correct in that most of it is well out of plane? or am I misflying it? If so, that would explain why I'm missing the Earth flyby...

flytandem · Aug 26, 2010

Adelanthal said:
Been trying out this run... am I correct in that most of it is well out of plane? or am I misflying it? If so, that would explain why I'm missing the Earth flyby...

??? maybe.... "Note that the orbits to icept on the trip from Venus to Earth should be set to "2". It sometimes slips down if off course."

Scenario 2010_EVVEJSN

flytandem

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Tex

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flying coffin

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Adelanthal

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