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I'm trying to conceptually understand something. Why is the LAN after achieving orbit drastically different than on the ground just prior to launch? What I can tell, the value is represented by the following "formula", which could very well be wrong, so please, I'd like to understand. Let G...

Hi. It's been a long time since I played orbiter and I'd like to get back into it. I'm just trying to find out what the latest version is and relevant sites. From what I can tell, is 2016 the latest version? I remember there was a DGIV add-on that I had. Does that still work with 2016 or is...

Hi. I'm actually asking two questions here with the first question focused around the mechanics, the why, the how come, the scientific rationale. The second simply polls what people do. In a vessel such as the shuttle, or any other similar rocket, it launches from a pad, straight up for a few...

The relationship between the altitude you are starting the deorbit process and the entry angle is clear; the higher you are the more shallow you need to be to avoid overheating. But, given a vessel, such as the DGIV, is there a table or chart available that shows the "safe" range? Of course...

Hi. I'm looking for more information on the display for OPS 4 in GPC MFD. The manual is sparse on this. If there is detailed information, can you please pass the link? Otherwise, here are my specific questions. All of these are referenced from the picture in the GPC MFD manual: 1) What is the...

The moon is a satellite around Earth and I've used IMFD quite successfully to get from the Earth to the Moon. But, what about using IMFD from the Moon to a satellite around the moon? I'm having an issue here. I'm sitting at Brighton Beach on one of the pads. I set the IMFD parameters, setting...

Hi. Is there an instrument only aid to precisely approach a landing pad? I know the VOR/VTOL is fine for landing on the pad. I'm referring to the approach. For example, if I'm at some altitude and distance from the base/pad, traveling at some velocity, the velocity vector cross hair can be...

Hi. I noticed that Attitude MFD doesn't control pitch (Velocity mode) of the Arrow spacecraft. It does control Yaw and Bank though. Any ideas?

Hello. This is not a post asking how to re-entry. I got that covered and I re-enter well every time. This question pertains on how to use PRO104SPECxx either correctly or more efficiently. I deorbit opposite the base and I control the AoA using PRO104SPECxx and by watching Aerobrake MFD. I...

This isn't a post to question HOW to use IMFD. I can USE it, now, I want to UNDERSTAND interplanetary travel. I don't want to be a button pusher, I want to understand why and how things happen. Please, read and comment on my understanding and answer my questions. I hope this will help others...

Here is the scenario. Planning a minimal energy transfer to Mars. Intercept MJD is 55385.601 which intercepts Mars at the transfer Apd. Given that date, if the ejection date is set for 55139.2 (246 day trip) and I manually rotate the display (shift-z) so that I'm almost looking across Mars'...

No no, I'm not starting a browser debate, just looking for information. Does opera make any registry edits? FF, to my knowledge, doesn't. Sorry, one more, does opera color manage profiles?

When in orbit, how do I synchronize my rotational velocity with my orbit so that the ship (DGIV or shuttle, etc) remains in the same orientation throughout the orbit? In other words, I want to maintain the same relative angle, normal to earth, during my orbit, just like the real shuttle does...

How do I do a direct ascent to the moon from earth? I want to take off from earth and head directly to the moon without entering a LEO. Can IMFD do it? If so, how? Thanks, Paul

HI. I want to enter the orbital elements for the ISS based on real life positioning. I got the elements from http://calsky.com. My question is on exactly how I should enter these into Orbiter Kepler Elements Semi-major Axis: 6730.773 km Eccentricity...

I am noticing AoA control differences during reentry between the DGIV autopilot PRO104 and the aerobrake MFD AoA controller. Assume I have the control mode set to auto on the DGIV. Aerobrake MFD often STRUGGLES to keep the correct AoA deep withing the atmosphere. I often have to have the AoA...

So, the DGIV can withstand reentry angles up to 1.2° correct? So, that angle, or the maximum safe angle must dependent on the altitude at deorbit burn right? For example, lets say that I don't really care where I'm going to land, to make this simple, that I just want to concentrate on deorbit...

Ok, lets say I want to launch to a specifc orbit. At a particular Inc, LAN, etc. Is there an MFD, or a combination that I can use to arrive to a particular orbit most efficiently? Or, should I use the scenario editor as my calculator to figure the orbital parameters out and place a...

If I'm approaching Earth from another planet, and I want to change my inclination to match the ISS, how do I do that in IMFD? Here is what I'm doing: When close to earth I change to the planet approach program. I set Ref: Earth, Target: ISS, Source: Self, and set the altitude (average of the...

Here is what I want to do: Eject from Earth, go to Venus in the DGIV, orbit a bit, and then go back to Earth. Assuming I have enough oxygen for 2 years, I want the most fuel efficient path possible (NOT doing a Hohman transfer though, too long) Here is my idea, can you please offer any...