Like Bill says "The SDK is worth reading" Well, maybe he never said those very words, but that was the idea.
I read through the electrical and hydraulic sections of "Aircraft Configuration Files" this morning and am including them below for y'all. Darn, 27 years of living in the States is finally getting at me!
[electrical]
These parameters configure the characteristics of the aircraft's electrical system and its components. Each aircraft has a battery as well as an alternator or generator for each engine.
Below is a table of electrical section parameters shown with default values for Bus Type, Max Amp Load and Min Voltage (the values applied if the parameters are omitted). The default Min Voltage equals 0.7*Max Battery Voltage. The list of components also reflects all of the systems currently linked to the electrical system. If a component is included in the list but the aircraft does not actually have that system, the component is simply ignored.
hydraulic_pump Bus type, max amp, min voltage (This is one of the list of electrical stuff).
[hydraulic_system]
The following parameters define the aircraft's hydraulic system:
Property Description Examples
normal_pressure The normal operating pressure of the hydraulic system, in pounds per square inch. Beech Baron 58( normal_pressure = 0.0 ) DeHavilland Beaver DHC2( normal_pressure = 1000.0 )
electric_pumps The number of electric hydraulic pumps the aircraft is configured with. Beech King Air 350( electric_pumps = 0 )
engine_map This array of positive integers sets the number of hydraulic pumps on the corresponding engines of the aircraft. The values correspond to the order of the engines, starting with the left-most engine first and moving right. By default, all engines are not equipped with any hydraulic pumps. DeHavilland Beaver DHC2( engine_map = 1 )
backup_reserve This system includes a backup reservoir for use after primary pumps have failed. ( backup_reserve = 1 )
max_reservoir_pressure_efficiency The approximate level in which the pumps will maintain the reservoir level. Set to 1.0 if a perfect system is desired. ( max_reservoir_pressure_efficiency = 0.98 )
min_pct_rpm_for_max_pressure The percentage of maximum engine RPM that engine driven hydraulic pumps will achieve 100% of normal pressure. The pressure will ramp up linearly. Omission of this constant will result in use of an internal mapping of RPM to pressure. ( min_pct_rpm_for_max_pressure = 0.2 )
So this is the place to state how many electrical hydraulic pumps there are. I have never flown with electrical hydraulic pumps, just ones driven by a gearbox from the engines, but I know the B737 has two electrical pumps in addition to two mechanical ones. Having a reservoir also explains the slow flaps with engine off movement that DG saw (and Heretics "residual pressure")
Like the man said "The SDK is worth reading". I had never studied those two sections in any detail.
Roy