The Beechcraft Super King Air 350 is a commuter category part 23 certified twin turboprop capable of carrying 8 to 12 passengers comfortably. The aft portion of the cabin has an enclosed potty and a baggage area capable of handling 550 lbs of bags. It cruises at 310 kts and has a range of 1,700 nm. This capable twin has a max takeoff weight of 15,000 lbs which means that unlike the king air 200 a 350 captain must be type rated in the aircraft. With a nine passenger seat configuration you can carry nine passengers and a full load of fuel. At max takeoff weight, at sea level, on a 30o C day, with flaps up, bleed air open and air-conditioning on the takeoff distance is 5,015 ft. Under the same conditions with the flaps at approach the takeoff distance is 4,187 ft.
King Air 350 Limitations, Specs, and Study Guide
Engines PT6A-60A
Engine shaft horsepower 1050 SHP
N1 compressor
Max T.O./Continuous/Transient 104%
Min idle 62%
N2 propeller
Min idle 1050 rpm
Max T.O./Climb/Cruise/Continuous 1700 rpm
Transient 1735 (7 min)
Transient 1870 (20 sec)
Max revers 1650
ITT
Max Start 1000oC (5 sec)
Max Idle 750oC
Max TO, continuous, cruise 820oC
Max climb 785oC
Transient 8500C (20 sec)
Torque
Max 100%
Transient 102% (7 min)
Transient 156% (20 sec)
Oil pressure
Min Idle 60 psi
Min TO/Climb/Cruise/Cont 90 psi
Max 135 psi
Transient 200 psi
Oil temp
Min start -40oC
Max Take off/continuous/transient 0-110oC
99-110oC limited to 10 minutes
Total oil each engine 14 quarts/3.5 gallons
Operating range Max to 4 quarts low on dipstick
Fuel
Maximum usable fuel 3611 lbs/539 gal
Main fuel system 2546 lbs/380 gal
Auxiliary fuel system 1065 lbs/159 gal
Each main fuel tank system 1273 lbs/190 gal
Each Auxiliary tank 533 lbs/79 gal
Max fuel imbalance 300 lbs
Cross feeding only approved for one engine inoperative
Takeoff with less than 265 in each wing or fuel gauges in yellow arc prohibited
Approved fuels Jet A, Jet A-1, Jet B, JP-4, JP-5, JP-8
(Only one standby pump required)
Emergency fuels 80 RED, 91/96, 100LL Blue, 100 Green 115/145 Purple
Limitations on the use of Aviation gasoline
150 hours between engine overhauls
Both standby pumps must be operative
Must be able to cross feed above 20,000 ft
Weights
Maximum Ramp Weight 15,100 lbs
Maximum Take-off Weight 15,000 lbs
Maximum Landing Weight 15,000 lbs
Maximum Zero Fuel Weight 12,500 lbs
Maximum Baggage compartment Weight 550 lbs / 510 lbs with fold up seats
Speeds
Maneuvering Speed VA 184 KIAS
Max flaps Extension/Extended VFE
Approach 202 KIAS
Full Down 158 KIAS
Max Landing Gear Operating Speed VLO
Extension 184 KIAS
Retraction 166 KIAS
Max landing Gear Extended VLE 184 KIAS
Air Minimum Control Speed VMCA
Flaps Up 94 KIAS
Flaps Approach 93 KIAS
Max Operating Speed VMO
Sea Level to 21,000 feet 263 KIAS
21,000 to 35,000 feet 263-194 KIAS (.58 Mach)
Red Line VMCA 94 KIAS
White Arc (full flap operating range) 81 to 158 KIAS
Wide White Arc (stall speeds) 81 to 96 KIAS
81 is VSO stall speed at max wt. flaps down and idle power
96 is VS stall speed at max wt. flaps up and idle power
White Triangle (max speed approach flaps) 202 KIAS
Blue Line (single engine best rate of climb) 125 KIAS
Max demonstrated crosswind 20 Kts
VX 125 Kts
VY 140 kts
VYSE 125 Kts
VXSE 125 Kts
Intentional one engine inoperative 110 kts
Turbulent air penetration speed 170 Kts
Max glide 135 Kts
Emergency descent 184 Kts
Minimum Airspeed for sustained icing in flight 140 Kts
Max airspeed for effective windshield deicing 226 Kts
External power limits 28-28.4v, 300amps continuous/1000 amps momentarily
Generators
Inflight
sea level to 34,000 ft 100%
Above 34,000 ft 95%
Ground
62% to 70% N1 75%
70% to 100% N1 100%
Starter Limits
30 sec ON, 5 min OFF
30 sec ON, 5 min OFF
30 sec ON, 30 min OFF
Rudder Boost must be operational for all flights
Yaw damp is required above 5,000 ft. If dual strakes are installed yaw damp must be operational above 19,000 ft
Prop speed of 1768 indicates failure of the primary governor. Limit torque to 96% and flight may be continued.
Over speed governor limits speed to 1768 rpm by dumping oil from the prop
Fuel topping governor limits prop to 106% of selected rpm, also limits reverse to 95% n1
Speeds above 1768 rpm indicate primary and over speed governor failure
Auto feather must be operational for takeoff, climb, approach and landing.
Both power levers must be above 90% N1
If torque drops below 17% the other side disarms
If torque drops below 10% the prop feathers
Auto ignition activates at 17% torque
Pneumatic pressure normal operating range 12-20 psi
AC compressor is on the right engine, automatically cuts out if-
Refrigerant pressure too high or low
Ambient temp below 10oC
Right engine below 62% N1
Electric heat – for ground use only
Temperature controller must be in manual heat
Both forward and aft blowers must be on
Electric heat light must out before turning off blowers
Landing gear warning horn activates and the gear handle illuminates red when-
Flaps up or at approach, Power below 85% N1 and gear not down. Can be cancelled
Flaps beyond approach and gear not down. Cannot be cancelled
On the ground with the handle in the up position
Cabin pressure switch –DUMP- dumps cabin with a limit of 13,500 ft cabin altitude
BAT BUS switch – opens a RCCB between the battery bus and the battery (isolates the battery)
Battery switch – closes the battery relay and the battery bus tie to power the triple fed and center busses
BATTERY CHARGE Illuminates at 7.5 amps. Extinguishes at 6 amps
Flight idle low pitch stop – is a mechanically activated hydraulic stop. Set on ground as power climbs above 68-70% N1 and L/R PROP PITCH extinguishes
Ground idle low pitch stop – electrically actuated solenoid set at 10o below the flight idle pitch stop. The right squat switch de-powers the stop at lift off.
If in flight the solenoid receives power for more than 10 seconds PROP GND SOL illuminates – pulling the PROP GOV TEST circuit breaker de-powers the solenoid – the light is inhibited on the ground by the left squat switch.
L/R PROP PITCH – indicates the prop is more than 8o below the flight idle pitch stop
Compressor bleed valve – a pneumatic piston that ports P2.5 Air to prevent compressor stalls
Jet flap – vents P2.5 Air through a variable slot in each hollow strut that connects the accessory section to the compressor this produces a swirl effect for air entering the compressor, to improve low speed compressor characteristics.
Hot battery bus lights– entry way lights, baggage light, emergency lights
10,000 ft CABIN ALTITUDE illuminates
12,000 ft CABIN ALT HI illuminates
12,500 ft passenger oxygen mask deploy
13,500 cabin dumb switch limit
L/R FUEL QTY 300 lbs less than 30 minutes remaining at max continuous power
Max cabin pressurization differential 6.6 psi, CABIN DIF HI at 6.9 psi
Aircraft Dimensions
length 46’ 8”
Height 14’ 4”
Wingspan 57’ 11”
Battery Bus
Avionics
Battery relay
Battery bus tie
Voltmeter
Ground Comm
Cabin entry lights
Digital clocks
Door lock lights
Instrument emergency lights
Engine Fire extinguisher L/R
Emergency Bus
Pilot ADI
Pilot HIS
Nav 1
RMI 2
Comm 1
glideslope 1
compass 2
marker beacon 1
CVR
radio relays