Hi,
the cfg I have shows 7000 litre capacity for the 79C and I added it for you to look at here.
It might be helpful to you
[fltsim.0]
title=Ansirial - SIAI S.79 "Corsa" I-CUPA
sim=sm79-d
model=
panel=
sound=
texture=
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Cupini & Paradisi S.79 "Corsa", Istres-Damasco-Paris Winner in 1937.\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Corsa"
ui_variation=I-CUPA
atc_heavy=0
atc_id=I-CUPA
atc_airline=Aeronautica Militare
atc_flight_number=I11
[fltsim.1]
title=Ansirial - SIAI S.79 "Corsa" I-BISE
sim=sm79-d
model=
panel=
sound=
texture=1
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Biseo & Paradisi S.79 "Transatlantico", South Atlantic crossing from Rome to Rio de Janeiro, 24-25th January 1938 (ex I-BIMU).\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Transatlantico"
ui_variation=I-BISE
atc_heavy=0
atc_id=I-BISE
atc_airline=Aeronautica Militare
atc_flight_number=BISE
[fltsim.2]
title=Ansirial - SIAI S.79 "Corsa" I-BIMU
sim=sm79-d
model=
panel=
sound=
texture=2
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Biseo & Mussolini S.79 "Corsa", placed 3rd in Istres-Damasco-Paris race in 1937.\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Corsa"
ui_variation=I-BIMU
atc_heavy=0
atc_id=I-BIMU
atc_airline=Aeronautica Militare
atc_flight_number=I5
[fltsim.3]
title=Ansirial - SIAI S.79 "Corsa" I-TOMO
sim=sm79-d
model=
panel=
sound=
texture=3
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Tondi & Moscatelli S.79 "Corsa", placed 6th in Istres-Damasco-Paris race in 1937.\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Corsa"
ui_variation=I-TOMO
atc_heavy=0
atc_id=I-TOMO
atc_airline=Aeronautica Militare
atc_flight_number=I6
[fltsim.4]
title=Ansirial - SIAI S.79 "Corsa" I-LICA
sim=sm79-d
model=
panel=
sound=
texture=4
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Lippi & Castellani S.79 "Corsa", retired after a take-off accident at Damascus during the Istres-Damasco-Paris race in 1937.\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Corsa"
ui_variation=I-LICA
atc_heavy=0
atc_id=I-LICA
atc_airline=Aeronautica Militare
atc_flight_number=I7
[fltsim.5]
title=Ansirial - SIAI S.79 "Corsa" I-ROTR
sim=sm79-d
model=
panel=
sound=
texture=5
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Rovis & Trimboli S.79 "Corsa", placed 8th in Istres-Damasco-Paris race in 1937.\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Corsa"
ui_variation=I-ROTR
atc_heavy=0
atc_id=I-ROTR
atc_airline=Aeronautica Militare
atc_flight_number=I12
[fltsim.6]
title=Ansirial - SIAI S.79 "Corsa" I-FILU
sim=sm79-d
model=
panel=
sound=
texture=6
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Fiori & Lucchini S.79 "Corsa", placed 2nd in Istres-Damasco-Paris race in 1937.\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Corsa"
ui_variation=I-FILU
atc_heavy=0
atc_id=I-FILU
atc_airline=Aeronautica Militare
atc_flight_number=I13
[fltsim.7]
title=Ansirial - SIAI S.79 "Corsa" I-BRUN
sim=sm79-d
model=
panel=
sound=
texture=7
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Mussolini & Mancinelli S.79 "Transatlantico", South Atlantic crossing from Rome to Rio de Janeiro, 24-25th January 1938 (ex I-FILU).\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Transatlantico"
ui_variation=I-BRUN
atc_heavy=0
atc_id=I-BRUN
atc_airline=Aeronautica Militare
atc_flight_number=BRUN
[fltsim.8]
title=Ansirial - SIAI S.79 "Corsa" I-MONI
sim=sm79-d
model=
panel=
sound=
texture=8
kb_checklists=Sm79-d_check
kb_reference=Sm79-d_ref
visual_damage=1
description=Moscatelli & Gori Castellani S.79 "Transatlantico", South Atlantic crossing from Rome to Rio de Janeiro, 24-25th January 1938 (ex I-CUPA).\n\nCopyright (c) 2003 LAGO S.r.l. and Ansirial.\nAll Rights Reserved.
ui_manufacturer=SIAI
ui_type=S.79 "Transatlantico"
ui_variation=I-MONI
atc_heavy=0
atc_id=I-MONI
atc_airline=Aeronautica Militare
atc_flight_number=MONI
[fltsim.9]
title=Ansirial - SIAI S.79 "Corsa"LATI
sim=sm79-d
model=
panel=
sound=
texture=t
kb_checklists=Sm79-d_check
prop_anim_ratio=1.02
kb_reference=Sm79-d_ref
atc_id=I-ATOS
ui_manufacturer=SIAI
ui_type=S.79 "Transatlantico"
ui_variation="SM79T_LATI"
description=SIAI 'Savoia Marchetti' S.79 Sparviero (Sparrow Hawk) torpedo bomber, known as 'il Gobbo' (the Hunchback) for its quite prominent dorsal hump which housed a forward fairing machine gun and an aft -firing flexible mounted weapon. Painted in the colours of LATI + depicting an aircraft on the Atlantic service to Brazil during 1939-41.
[fltsim.10]
title=Ansirial - SIAI S.79 "Corsa"RACER
sim=sm79-d
model=
panel=
sound=
texture=cs
kb_checklists=Sm79-d_check
prop_anim_ratio=1.02
kb_reference=Sm79-d_ref
atc_id=I-CUPI
ui_manufacturer=SIAI
ui_type=S.79 "Transatlantico"
ui_variation="SM79CS_RACER"
description='Savoia Marchetti' S.79 Sparviero (Sparrow Hawk). 2 models of the most famous italian aircraft of WWII.This S.M. is depicted as one of the racer aircraft of the late 1930s.
[contact_points]
point.0=1, -35.656, 0.0, -1.817, 1200.0, 0, 0.60, 10.0, 0.200, 2.5, 0.695, 0.0, 0.0, 0.0, 0.0, 0.0
point.1=1, 0.700, -9.5, -8.9, 1600.0, 1, 1.35, 0.0, 0.704, 2.5, 0.686, 20.0, 50.0, 7.0, 166.0, 166.0
point.2=1, 0.700, 9.5, -8.9, 1600.0, 2, 1.35, 0.0, 0.704, 2.5, 0.682, 20.0, 50.0, 7.0, 166.0, 166.0
point.3= 2.000, 0.426, -8.543, -4.583, 3000.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 5.000, 0.000, 0.000
point.4= 2.000, 0.426, 8.543, -4.583, 1574.803, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 6.000, 0.000, 0.000
point.5= 2.000, -34.671, 0.000, -0.688, 1574.803, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 9.000, 0.000, 0.000
point.6= 2.000, 9.917, 0.000, -2.421, 1574.803, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 4.000, 0.000, 0.000
static_pitch= 11.200
static_cg_height= 7.5
point.7= 2.000, -2.332, 34.219, -0.216, 1574.803, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 6.000, 0.000, 0.000
point.8= 2.000, -2.332, -34.219, -0.216, 1574.803, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000, 5.000, 0.000, 0.000
gear_system_type=1 //Hydraulic
tailwheel_lock = 1
[Views]
eyepoint=0.33,-1,3.16
[General]
atc_type=SIAIMARCHETTI
atc_model=S.79C
editable=1
performance=Maximum Speed\n230 Kts 426 km/hr\n\nEngines\nAlfa Romeo 126 RC 34 2040 hp\n\nPropeller\nThree-bladed Ratier constant-speed, variable pitch\n\nMaximum Range\n2,814 nm 5.150 km\n\nService Ceiling\n21,325 ft 6,500 km\n\nFuel Capacity\n1,849 gal 7.000 L\n\nMaximum Gross Weight\n26,780 lb 12.147 kg \n\nLength\n51.18 ft 15,6 m\n\nWingspan\n69.55 ft 21,2 m\n\nHeight\n15.08 ft 4,6 m\n\nSeating 4\n\nUseful Load\n11,789 lb 5.347 kg
[WEIGHT_AND_BALANCE]
reference_datum_position= 0.000, 0.000, 0.000
empty_weight_CG_position= 0.000, 0.000, 0.000
max_number_of_stations=50
station_load.0 = "170.0, 0.682, -0.98, 1.765, Pilot" //Weight, Lat, Lon, Vert Position
station_load.1 = "170.0, 0.682, 0.98, 1.765, Co-Pilot" //Weight, Lat, Lon, Vert Position
station_load.2 = "170.0, -3.398, -0.98, 1.765, Flight Engineer" //Weight, Lat, Lon, Vert Position
station_load.3 = "170.0, -3.398, 0.98, 1.765, Radio Operator" //Weight, Lat, Lon, Vert Position
empty_weight= 14991.000
empty_weight_roll_MOI= 72194.000
empty_weight_pitch_MOI= 265024.000
empty_weight_yaw_MOI= 247000 //133101.000
empty_weight_coupled_MOI= 0.000
max_gross_weight= 26780.000
CG_forward_limit= 0.000
CG_aft_limit= 1.000
[fuel]
LeftMain= 0.000, -4.488, -1.181, 411.000, 0.000
LeftAux= -10.620, -8.503, -3.543, 108.000, 0.000
RightMain= 0.000, 4.488, -1.181, 411.000, 0.000
RightAux= -10.620, 8.503, -3.543, 108.000, 0.000
fuel_type=1.000000
number_of_tank_selectors=1
Center1= 0.000, 0.000, -1.181, 411.000, 0.000
Center2= -8.267, 0.000, 0.000, 184.000, 0.000
LeftTip= -2.362, -12.990, -1.181, 108.000, 0.000
RightTip= -2.362, 12.990, -1.181, 108.000, 0.000
electric_pump=0
[airplane_geometry]
wing_area= 692.000
wing_span= 69.583
wing_root_chord= 9.917
wing_dihedral= 2.999
wing_incidence= 0.000
wing_twist= -1.000
oswald_efficiency_factor= 1.000
wing_winglets_flag= 0
wing_sweep= 2.999
wing_pos_apex_lon= 1.916
wing_pos_apex_vert= -1.627
htail_area= 90.144
htail_span= 25.833
htail_pos_lon= -28.7
htail_pos_vert= 3.064
htail_incidence= 0.000
htail_sweep= 30.000
vtail_area= 36.257
vtail_span= 11.229
vtail_sweep= 30.000
vtail_pos_lon= -28.7
vtail_pos_vert= 4.074
elevator_area= 24.76 //31.23
aileron_area= 49.084
rudder_area= 15.34
elevator_up_limit= 10.000 //27.502
elevator_down_limit= 10.626
aileron_up_limit= 13.000
aileron_down_limit= 26.000
rudder_limit= 23.491
elevator_trim_limit= 6.000 //10.000
spoiler_limit= 0.0
spoilerons_available= 0
aileron_to_spoileron_gain= 0.000
min_ailerons_for_spoilerons= 0.000
min_flaps_for_spoilerons= 0.000
[GeneralEngineData]
engine_type= 0
Engine.0= 5.905, -8.503, -1.667
Engine.1= 11.102, 0.000, 0.000
Engine.2= 5.905, 8.503, -1.667
fuel_flow_scalar= 1.000
min_throttle_limit=0.000000
master_ignition_switch = 1
max_contrail_temperature=-27
[piston_engine]
max_rpm_mechanical_efficiency_scalar=1.000
idle_rpm_mechanical_efficiency_scalar=1.000
max_rpm_friction_scalar=1.000
idle_rpm_friction_scalar=1.000
cylinder_displacement= 194.000
compression_ratio= 6.500
number_of_cylinders= 9
max_rated_rpm= 2500.000
max_rated_hp= 780.000
fuel_metering_type= 1
cooling_type= 0
normalized_starter_torque= 0.300
turbocharged= 1
max_design_mp= 37.000
min_design_mp= 1.574
critical_altitude= 11154
emergency_boost_type= 0
emergency_boost_mp_offset= 0.000
emergency_boost_gain_offset= 0.000
fuel_air_auto_mixture= 0
auto_ignition= 0
power_scalar=1.000
[propeller]
propeller_type= 0
propeller_diameter= 10.000
propeller_blades= 3
propeller_moi= 26.250
beta_max= 24.000
beta_min= 18.000
min_gov_rpm= 1400.000
prop_tc= 0.100
gear_reduction_ratio= 0.655
fixed_pitch_beta= 0.000
low_speed_theory_limit= 80.000
prop_sync_available= 1
prop_deice_available= 0
prop_feathering_available= 0
prop_auto_feathering_available= 0
min_rpm_for_feather= 0.000
beta_feather= 0.000
power_absorbed_cf= 0.000
defeathering_accumulators_available= 0
prop_reverse_available= 0
minimum_on_ground_beta= 0.000
minimum_reverse_beta= 0.000
thrust_scalar=0.700
[Reference Speeds]
flaps_up_stall_speed= 70.000
full_flaps_stall_speed= 56.000
cruise_speed= 103.570
max_indicated_speed=245.703125
[keyboard_response]
//Breakpoint speeds (knots) on the keyboard increments of control surfaces.
//Speed at which the incremenet is reduced to 1/2 and 1/8 respectively.
elevator =200, 450.000
aileron =200, 1000
rudder =200, 1000
[autopilot]
autopilot_available=1
flight_director_available=0
default_vertical_speed=500.000000
autothrottle_available=0
autothrottle_arming_required=0
autothrottle_takeoff_ga=0
autothrottle_max_rpm=90.000000
pitch_takeoff_ga=8.000000
max_pitch=10.000000
max_pitch_acceleration=1.000000
max_pitch_velocity_lo_alt=2.000000
max_pitch_velocity_hi_alt=1.500000
max_pitch_velocity_lo_alt_breakpoint=20000.000000
max_pitch_velocity_hi_alt_breakpoint=28000.000000
max_bank=25.000000
max_bank_acceleration=1.800000
max_bank_velocity=3.000000
max_throttle_rate=0.100000
nav_proportional_control=9.000000
nav_integrator_control=0.250000
nav_derivative_control=0.000000
nav_integrator_boundary=2.500000
nav_derivative_boundary=0.000000
gs_proportional_control=9.520000
gs_integrator_control=0.260000
gs_derivative_control=0.000000
gs_integrator_boundary=0.700000
gs_derivative_boundary=0.000000
yaw_damper_gain=0.000000
[direction_indicators]
direction_indicator.0 = 1,0
direction_indicator.1 = 2,0
direction_indicator.2 = 2,0
[flight_tuning]
cruise_lift_scalar=1.000
pitch_stability=1.000
roll_stability=1.000
yaw_stability=1.000
parasite_drag_scalar=0.9000 //1,.0000
induced_drag_scalar=1.000
elevator_effectiveness=0.1500 //1.000
aileron_effectiveness=0.6750 //1.000
rudder_effectiveness=0.6750 //1.000
elevator_trim_effectiveness=0.1000 //0.2500 //1.000
aileron_trim_effectiveness=0.3400 //0.6570 //1.000
rudder_trim_effectiveness=0.6570 //1.000
[electrical]
max_battery_voltage = 24
max_battery_amps = 44
generator_alternator_voltage = 24
max_generator_alternator_amps = 33
engine_generator_map= 1,0,1
[LIGHTS]
//Types: 1=beacon, 2=strobe, 3=navigation, 4=cockpit
light.0 = 3, 0, -32.88,-0.17, fx_navred
light.1 = 3, 0, 32.88,-0.17, fx_navgre
light.2 = 3, -38.41, 0.00, 0.75, fx_navwhi
light.3 = 4, 1.692, 0, 3.322, ansirial_fx_luceblu
light.4 = 4, -6.00, 0.00, 1.80, fx_vclight
[Radios]
// Radio Type=availiable, standby frequency, has glide slope
Audio.1=1
Com.1=1, 0
Com.2=1, 0
Nav.1=1, 0, 1
Nav.2=1, 0, 0
Adf.1=1
Transponder.1=1
Marker.1=1
[EFFECTS]
wake=fx_wake
water=fx_spray
dirt=fx_tchdrt
concrete=fx_sparks
touchdown=fx_tchdwn_s, 1
startup=fx_engstrt_ryan
contrail=fx_A_I_Contrail
[Flaps.0]
type= 2
span-outboard= 0.600
extending-time= 5.000
system_type= 3
damaging-speed= 0.000
blowout-speed= 0.000
lift_scalar= 0.500
drag_scalar= 0.500
pitch_scalar= 0.500
flaps-position.0= 0.000, 0.000
flaps-position.1= 0.500, 0.000
flaps-position.2= 1.250, 0.000
flaps-position.3= 2.000, 0.000
[Flaps.1]
type= 1
span-outboard= 0.300
extending-time= 5.000
system_type= 3
damaging-speed= 140
blowout-speed= 175
lift_scalar= 1.000
drag_scalar= 1.000
pitch_scalar= 1.000
flaps-position.0= 0.000, 0.000
flaps-position.1= 9.998, 0.000
flaps-position.2= 19.996, 0.000
flaps-position.3= 29.994, 0.000
[brakes]
parking_brake = 1 //Parking brake available
toe_brakes_scale = 0.33//1.0 //Brake scalar
differential_braking_scale = 1.0 //Delta on the amount of brake when the rudder pedals deflected
[gear_warning_system]
gear_warning_available = 1 //Normal
pct_throttle_limit = 0.1 //Percent throttle that activates warning
flap_limit_idle = 0.0 //Flap angle that activates warning at idle
flap_limit_power = 16.0 //Flap angle that activates warning at above idle
[exits]
number_of_exits = 1
exit_rate.0 = 0.4 ;Percent per second
[hydraulic_system]
normal_pressure = 732.0 //PSI
electric_pumps = 0 //no electric pumps
engine_map = 1,0,1,0 //pumps on Eng1,3
[forcefeedback]
ground_bumps_magnitude1=2600 ; 0 - 10000
ground_bumps_angle1=8900 ; 0 - 35999 degrees
ground_bumps_intercept1=5.0
ground_bumps_slope1=0.6
ground_bumps_magnitude2=1200 ; 0 - 10000
ground_bumps_angle2=9100 ; 0 - 35999 degrees
ground_bumps_intercept2=0.085
ground_bumps_slope2=0.65
crash_magnitude1=10000 ; 0 - 10000
crash_direction1=01000 ; 0 - 35999 degrees
crash_magnitude2=10000 ; 0 - 10000
crash_direction2=9000 ; 0 - 35999 degrees
crash_period2=75000 ; in microseconds
crash_duration2=3500000 ; in microseconds
[stall_warning]
type=0
[attitude_indicators]
attitude_indicator.0=1
[turn_indicators]
turn_indicator.0=1,0
