"Spider" Lunar Excursion Module
A custom vessel addon for Orbiter 2010
Flying the LEM:
The VC:
The virtual cockit is the Orbinaut's primary method for controlling and monotoring spacecraft status and subsystems. Buttons, Switches and other active area can be manipulated by the mouse. As a rule of thumb left-clicking will flip a switch up or move a dial to the right and right-clicking will flip it down or move it to the left.
Main Propulsion System:
The main propulsion system (MPS) consists of two Stages; the Descent Stage and the Ascent Stage. Both are controled by Orbiter's default "Hover" keys ([0] and [.] on your computer's numpad) and by an array of switches in the lower left corner of Panel 1.
[B]To fire the MPS pressurize the proppelant and oxidizer feed lines by opening their respective pressure regulator valves, and then select the appropriate engine using the "ENG ARM" switch.[/B] The MPS can be secured by pressing the "Kill Thrust" button ([*] on your numpad) or by moving the "ENG ARM" switch to "SAFE" and closing the propellant and oxidizer flow valves.
NOTE: In normal operation the Descent Stage throttle is restricted to values between 10% to 90%. The Ascent Stage is not throttlable and will continue to burn at 100% until it is shut down or propellant has been expended.
Reaction Control System:
The RCS is made up of 16 thrusters seperated into two independent subsystems (A and B) consisting of eight thrusters each. Under normal conditions, the two systems function together. However, even functioning alone, either RCS system is capable of steering the spacecraft.
The RCS system is controled by Numpad/Joystick inputs from the Orbinaut and by a four rows of four switches on the left side of Panel 2. [B]The top row of switches controls the RCS fuel and oxidizer shut of valves. These switches enable/disable flow of propellant and O2 from the primary RCS tanks to the syestem A and B manifolds.[/B] The middle two rows of switches control allow individual thruster quads to be turned on and off. The final row of switches controls the propellant crossfeed valves, allowing the individual RCS subsystems to draw propellant either from each-other or from the Ascent Stage propellant tanks.
NOTE: [B]Ascent engine feed lines must be pressurized for RCS to draw from the Ascent stage tanks.[/B]