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  1. francisdrake

    Flight Question How to aim for a landing on Earth in daylight

    That is an interesting point. Usually I play around with the scenario date, to allow for good lighting conditions in the target area. For example Date MJD 52006.7485132526 If you add 0.5 (half a day) to the date, you have a good chance to arrive in daylight, if previously there was night...
  2. francisdrake

    Request Artemis landers

    I have a small request for the next cfg-update: Can you please change the visibility mode of the dyneticstest2 mesh to 5? MESH_0_VIS = 5 ; was 7 Reason: With 5 it will be visible in external view and virtual cockpit view, but not in the glass cockpit. With the current setting of 7 it is...
  3. francisdrake

    Request Artemis landers

    Scenario with the Alpaca on a FalconHeavy. This should work with the new attachment points in the cfg-file. Included Gargantua2024's modified animation status, so the landing legs and stairs are retracted.
  4. francisdrake

    Request Artemis landers

    Ok, first test results: In the Dyneticstest.cfg please change the attachment def's to ;<-------------------------ATTACHMENTS DEFINITIONS-------------------------> ATT_0_IDX = 0 ATT_0_POS = -4.85 0 0 ATT_0_DIR = -1 0 0 ATT_0_ROT = 0 1 0 ATT_0_RANGE = 10 ATT_0_ID = Rocket ATT_0_TOPARENT = TRUE...
  5. francisdrake

    Direct transfers

    In The Expanse the ships run the Epstein drive at a constant acceleration of 1 g = 10 m/s². If my 'back of an envelope' calculations are correct this brings you to Mars in just 2 days. The planet does not move far in this short time. Point the ship, pull a little lead (aim in the moving...
  6. francisdrake

    Request Artemis landers

    Thanks for setting up the GoogleDrive workspace! A general remark: Some files are called Dynetics___ (with an 's'), some are called Dynetic (without an 's'). This could lead to typos. As the company is call Dynetics (with 's'), I would suggest to use this spelling. A config-File missing: -...
  7. francisdrake

    Request Artemis landers

    Alpaca Vers. 3 on a FalconHeavy 1) Would it be possible to have the landing legs and stairs retracted by default? 2) There is now a white plate on top of the vessel, around the docking port. Is this real, or a modelling artefact?
  8. francisdrake

    Direct transfers

    The direct transfer in The Expanse, using the Epstein drive, is called brachistochrone transfer. There is some information on the AtomicRockets page. In Orbiter you can basically switch on planetarium mode [F9], look for your target planet, point the nose to it and accelerate. On halfway...
  9. francisdrake

    Request Artemis landers

    Regarding online collaboration: I was thinking of nothing fancy. The simplest way could be a GoogleDrive public folder, where the recent stable versions and the one currently in development are kept in their folder structure. To avoid mutual overwriting, a txt-file could be used track who is...
  10. francisdrake

    Request Artemis landers

    barrygolden wrote < Just gave a try of the Falcon heavy /ALPACA launch but don't see the ALPACA on it. Am I missing something ? > The problem seems to an old invalid definition of the attachment point. I found out by trial and error. Open the Dynetictest.cfg file and overwrite the attachment...
  11. francisdrake

    Request Artemis landers

    Ok, the arrays are there. :) It looks like they are constantly rotating. Is there a key to control them? To define the thrusters as hover, a setting needs to be changed in the thruster groups further down in the cfg file: ;<-------------------------THRUSTER GROUPS...
  12. francisdrake

    Request Artemis landers

    It seems to miss the DYNETICSARRAY, the cfg and the mesh.
  13. francisdrake

    Request Artemis landers

    The model is very good looking! Empty Mass suggested to be either 5800 (lander without drop tanks), or 6700 including both drop tanks dry mass. I am not sure, if the drop tanks bring their own dry mass with them when attached. VSIZE suggest to reduce to 6 (radius of surrounding sphere, not...
  14. francisdrake

    Request Artemis landers

    < I keep hearing that there is interest in recovering the drop tanks for later fuel storage. I wonder if this could land with those still attached but empty > Re-using tanks was mentioned in the interview the AngryAstronaut held with a spokesperson of Dynetics. Two good tanks on the Lunar...
  15. francisdrake

    Request Artemis landers

    Short answer: Yes. Long answer: But only the lander itself, without the drop tanks. Attached is a scenario to launch the Alpaca on a FalconHeavy. Orbital node lines are aligned with the Moon on the scenario date. Proceed with a partial TLI burn until the 2nd stage runs dry, then separate the...
  16. francisdrake

    Request Artemis landers

    < This is what I get: > Yes. The Principle Moment of Inertia (PMI) are the main diagonal of the inertia tensor. Here: 2.91 ... ... around x-axis (left to right) ... 7.98 ... around y-axis (up) ... ... 8.11 around z-axis (forward) As this is probably the lander-mesh without...
  17. francisdrake

    Request Artemis landers

    Thanks guys! If the R-4D thrusters shall be used, the moments of inertia shall be reduced as well. These are the approximate values if the mesh is analyzed in Orbiter's Shipedit tool: PMI = 2.5 9 9
  18. francisdrake

    Request Artemis landers

    < newdyneticscfg1.zip > Was there a special reason why the engines were changed back from Hover to Main engines? This is a little confusing for a belly lander.
  19. francisdrake

    Request Artemis landers

    To me the new T-shaped struts look very good, much more realistic than the old bulky ones! ___ I found the RCS control to be a little sluggish. The vessel tends to over-rotate when the autopilots (prograde, retrograde) are used and 'dances' around the desired vector before settling down...
  20. francisdrake

    Request Artemis landers

    Maybe the truss should not be too flimsy. :) The hab with ~3.6 ton is hanging down from it, suspended by the force of the engines while firing. The engines will provide somewhat over half a Gee, so still ~2 tons to take into account. Could look like the ISS truss connection to the solar panels.
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