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#31 |
Orbinaut
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#32 |
Orbinaut
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Here, notice the that the maneuver mode target is centered, but my orientation is nearly all retrograde. I've never had it that close. Usually, it orients me around 300 degrees or so. In this case, I'm at 191. And crap...It's never suggested that much DV. ![]() Here are the settings for this scenario. DGIV in Orbit Scenario Transx parameters Eject date: 52020.8928 Prograde: 1,405 Outward: 806.8 Plane Change: -8,815 |
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#33 |
Orbinaut
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![]() And for the tesseract... Gosh, that is just a 3D projection (or shadow) of a 4D cube, we can't really see the hypercube, but I would really like... ![]() |
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#34 |
Orbinaut
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As for the tesseract, it caused me many sleepless nights. And still does when I revisit it. ![]() ---------- Post added at 01:07 AM ---------- Previous post was at 01:01 AM ---------- Quote:
I just realized why the DV was so high. I inadvertently plugged the Encounter DV from stage 2 into stage 1 during the maneuver portion. ![]() In some of your videos, you set up the plan in stage 2, then you look at the Delta V in stage 1. Then you enable maneuver mode in stage one and plug that number in, which is what I do. I also set the date in the stage 1 maneuver to match that of the date in the stage 2 plan. Should I also enter the values for outward velocity and plane change, or am I correct in assuming that the DV calculation read from stage 1 after planning accounts for that? That number is different than the number in the stage 2 plan, so that's why I'm assuming it does account for it. |
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#35 |
Tutorial Publisher
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You said you set the date of the maneuver as being the date from the stage 2 plan. There's the problem. The plan is very rough when it comes to date. Let's say you have a plan and you get into a nice parking orbit, nicely aligned with the plan. The problem is that as you are doing your orbits you will surely find that yhou are part way around an orbit at the exact time of the planned departure date. This is a reason to set up a maneuver instead of trusting the plan. Especially if the plan is date sensitive. Sometimes they are not too bad to be 45 minutes early or late. But to set up a maneuver then use the date of the plan shows you don't understand the importance of the precision of the maneuver with respect to date. Here's what you need to do.... As you said you do,... grab the required deltav from Stage 1 for the stage 1 maneuver that you are turning on. Make sure you are aligned well (within .1 degrees of the plan). When you turn on the maneuver and add the required prograde you will now see 2 separate dashed yellow trajectories. One of them is for your plan from stage 2 and the other is for the maneuver you have just set up. Now for date swing the date forward and you'll see the yellow dashed yellow line start rotating around the Earth. Adjust the date forward until it lays perfectly on top of the other yellow dashed line. Use hyper and do short clicks of the mouse to be precise. Then go to stage 2 and make all the velocity values of your plan = zero. When the last velocity value is reset to zero the stage 1 will only show the maneuver trajectory and stage 2 and 3 will now be showing what the maneuver will cause if burned as planned. Now tweak the velocity (prograde) and date (hyper with short clicks) to find the best solution for the trip you are making. The turn to face the x and burn. In summary, I think you have 2 errors. 1 is using the date of the plan and not making the date according to what the maneuver will show, and the 2nd error is (just guessing since you aren't showing me a full scenario) that you are leaving the plan in place meaning that stage 3 is working from the plan not the maneuver. ---------- Post added at 08:04 PM ---------- Previous post was at 07:46 PM ---------- This is the part of the youtube tutorial that deals with the details explained above Earth to Mars Part 3: see from 40 seconds thru about 2:20. ![]() |
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#36 |
Orbinaut
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Off-Topic:
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#37 |
Orbinaut
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---------- Post added at 08:41 PM ---------- Previous post was at 08:37 PM ---------- Quote:
![]() Good video! Thanks... Problem is, once I figure that one in my head, something else will pop in to keep me awake - Such is the nature of the insatiable thirst for knowledge. |
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#38 |
Orbinaut
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Flytandem, When I plug in the prograde Deltav quantity into the maneuver program, my hypothetical orbit comes up way short. It doesn't even leave Earth's SOI. What is up with that?
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#39 |
Orbinaut
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#40 |
Tutorial Publisher
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#41 |
Orbinaut
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![]() ![]() Details, details,details! Last edited by Mister Mxyzptlk; 02-03-2011 at 04:24 AM. |
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#42 |
Tutorial Publisher
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---------- Post added 02-03-11 at 07:22 AM ---------- Previous post was 02-02-11 at 09:58 PM ---------- Just thinking about how I used to do just maneuvers in TransX in the first few weeks. Didn't know how to set up plans so I always just did whatever maneuver got me s far to my destination as possible... it's simple but somewhat hit and miss. so with a bit of nostalgia, in a couple of minutes I came up with.... open the stock scenario, dgMk 4 in orbit" in the deltaglider folder. prograde= 3892.60877755 date= 51982.5631915 may not be the most efficient way but it's not far from it. |
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#43 |
Orbinaut
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At this point I am going to digest your earth to mars tuts. I can get wherever I want to go in the solar system, and as I am a returnee (hint: I sent you a CD in the mail), I even have arrived at a trojan as per your trojan tuts and piper's challenge. But, and I have a big but, I am extrmely out of practice, and would like to learn the art of efficiency.
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#44 |
Tutorial Publisher
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![]() ![]() edit: http://www.orbiter-forum.com/showthr...&postcount=135 Last edited by flytandem; 02-03-2011 at 05:52 PM. |
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#45 |
Orbinaut
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---------- Post added at 07:54 PM ---------- Previous post was at 07:49 PM ---------- Quote:
So far with Tranx, I've visited Mars, Venus, Phobos, Deimos, Jupiter and several of its moons, and Saturn and several of its moons. Oh, and Transx is SO much better than sync orbit when trying to intercept the ISS. |
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orbit, transfer, transx |
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