XR Flight Operations Manual Version 3.0
Copyright 2006-2018 Douglas Beachy. All Rights Reserved.
41
O
2
Remaining Display
Oxygen time remaining is of course proportional to the number of crew members
onboard the ship.
APU Fuel Management
The APU (
Auxiliary Power Unit
) provides hydraulic power to the ship. It powers flight
control systems, doors, radiator deployment, etc. You will normally only run the APU
during takeoff and landing in an atmosphere, reentry, or you will run it for a short
time when you need to open or close an airlock door or the payload bay doors.
Unless APU fuel consumption is disabled via the
APUFuelBurnRate
setting in the
ship’s config file
, the APU has limited fuel so be efficient with its use and don't leave
it running when you don't need it.
If you attempt to take off in an atmosphere with the APU off you will hear a warning
callout from the computer.
Because the APU is the sole source of hydraulic power on XR vessels, the APU must
be running in order for these systems to operate:
o
Airlock Ladder
o
Docking Port/Nosecone
o
Outer Airlock Door
o
Inner Airlock Door
o
Airbrake
o
Cabin Hatch
o
Radiator
o
Retro Doors
o
Landing Gear
o
Payload Bay Doors
o
Crew Elevator
o
Flight Control Surfaces (elevons, rudder, elevator trim, etc.)
o
Wheel Brakes
Nominal APU startup/shutdown time is 2.5 seconds.
As a safety feature, if you leave the APU running for more than 60 seconds with no
load on it (i.e., without using it) you will hear a warning callout from the computer.
This warning interval may be changed or eliminated via the
APUIdleRuntimeCallouts
