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I'm having enormous difficulty understanding TransX, despite reading the Orbiter, Delta-Glider, TransX Quickstart, and TransX manuals, and watching both David Courtney's and flytandem youtubers.
Situation : In orbit around the moon @ 2.957rad, zero eccentricity, plane aligned to earth with close to zero (.0001) relative inclination. Watched this video to get some idea of planning an earth return : [ame="http://vimeo.com/13319674"]TransX Tutorial - Moon to Earth on Vimeo[/ame] .
I set up the return as best I could, following the instructions as best I could. What is confusing is that you have to enter a negative prograde delta to get an earth return ellipse, and then do a positive prograde burn at burn time, as reported in the escape plan. In any case, in the video, after the prograde burn which shows a green trajectory line matching the dashed yellow planned escape, at some point the transx plan 'switches stages' which allows for an MCC manuver. In my attempt, the transx never switches stages, and I do not appear at that point to be able to use transx for anything useful for a return to earth orbit. So, there are still fundamental things I dont understand about transx at this point. I should note that using transfer and dead reckoning for the return have been far more successful in my efforts (for example, just escaping the Moon ZOI and visually heading for earth and then using the OrbitMFD once the hud switch to earth happens).
So, I am looking for some handholding here. I can post screenies on request of the current situation with shots of the transx reports, and what happens after the burn.
Situation : In orbit around the moon @ 2.957rad, zero eccentricity, plane aligned to earth with close to zero (.0001) relative inclination. Watched this video to get some idea of planning an earth return : [ame="http://vimeo.com/13319674"]TransX Tutorial - Moon to Earth on Vimeo[/ame] .
I set up the return as best I could, following the instructions as best I could. What is confusing is that you have to enter a negative prograde delta to get an earth return ellipse, and then do a positive prograde burn at burn time, as reported in the escape plan. In any case, in the video, after the prograde burn which shows a green trajectory line matching the dashed yellow planned escape, at some point the transx plan 'switches stages' which allows for an MCC manuver. In my attempt, the transx never switches stages, and I do not appear at that point to be able to use transx for anything useful for a return to earth orbit. So, there are still fundamental things I dont understand about transx at this point. I should note that using transfer and dead reckoning for the return have been far more successful in my efforts (for example, just escaping the Moon ZOI and visually heading for earth and then using the OrbitMFD once the hud switch to earth happens).
So, I am looking for some handholding here. I can post screenies on request of the current situation with shots of the transx reports, and what happens after the burn.
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