Piper Seneca


Aircraft Number Empty Weight Empty Moment Useful Load
55908 2811.4 lbs. 239648.8 1388.6 lbs.

Maximum Weights

Maximum Weights
Ramp Weight 4200 lbs.
Takeoff Weight 4200 lbs.
Landing Weight 4000 lbs.
Baggage Weight 200 lbs.
Area 1 100 lbs.
Area 2 100 lbs.



Lycoming IO-360 on left side, Lycoming IO-360 on right side, 200BHP @ 2700 RPM. Four cylinders, direct drive, horizontally opposed, air-cooled, carburetor-equipped.


Full 8 qt.
Minimum for Local Flight 6 qt.
Minimum for X-Country 7 qt.
Grade and Type Summer - 100W50 wt.
Winter - 65W30 wt.

Fuel System


Approved Grades 100LL (blue), 100 (green)
Total Fuel 98.0 Gal.
Total Usable 93.0 Gal.

System Description:

The airplane is equipped with a standard fuel system consisting of four vented fuel tanks, fuel tank selector valves, fuel strainer, engine driven fuel pump, auxiliary electric fuel pump, and fuel injection system. Fuel is pressure feed from the wing tanks to the fuel selector/crossfeed valve, through a fuel strainer to the fuel pumps and then to the fuel metering unit. From the metering unit, fuel flows to the intake valves through injectors. Electrical driven fuel pumps are used as backup pumps and should be on for takeoff and landing. Crossfeed valves are provided for fuel balance to extend single engine range. There are 8 fuel drains on this aircraft, 2 for each wing, 2 for fuel filters, and 2 for each crossfeed drain.

Landing Gear and Brakes

System Description:

Landing gear is a retractable tricycle type with a steerable nose wheel. Shock absorption is accomplished through air/oil main gear struts and an air/oil nose gear strut. Nose wheel steering will turn the nose wheel through a 15 degree arc each side of center. Differential braking will increase the turning arc up to 30 degrees each side of center. Each main gear is equipped with a hydraulically actuated disc type brake. When the gear lever is moved up or down, it creates a pressure change which electrically activates the hydraulic power pack which then hydraulically raises or lowers the gear. The gear is held in the UP position by hydraulic pressure and in the DOWN position by mechanical locks. A squat switch on the nose gear prevents inadvertent raising of the gear while on the ground. A hand operated hydraulic release is provided for manual extension of the landing gear in the event of a hydraulic power pack failure. A gear warning horn sounds when the one or all of the gear are not locked down and the manifold pressure drops below 12 inches or flaps are extended beyond 20 degrees. A green gear light indicates all three gear are down and locked. An amber light indicates that the one or all of the gear are not down and locked or the hydraulic power pack is operating.

Tire Inflation:

Mains 53 psi
Nose 31 psi

Electrical System

Alternator 14 volt, 60 ampere
Battery 12 volt

System Description:

Power is supplied to most general electrical items through the primary bus. All avionics are powered by the avionics bus. The two busses are tied together through the avionics power switch, which also functions as a circuit breaker for the avionics bus. The ammeter is connected to the battery and shows whether the battery is charging or discharging. .

Pitot-Static System

System Description:

The system is standard with a heated pitot head under the left wing and static ports on both sides of the nose cowling. The alternate static source is located on the panel below the throttle and supplies static pressure from inside the cockpit..


​Best Rate of Climb Single Engine ​Vyse 105 MPH​
​Minimum Controllable Airspeed ​Vmc ​80 MPH
​Stall in Landing Configuration ​Vso ​69 MPH
​Stall in Cruise Configuration ​Vs1 76 MPH​
​Rotate Speed ​Vr ​90 MPH
​Best Angle of Climb Vx​ 90 MPH​
​Best Rate of Climb Vy​ 105 MPH​
Maneuvering Speed Va
​4200 lbs. ​146 MPH
​2750 lbs. ​133 MPH
Flaps Extended Vfe
0 - 10° 160 MPH
10 - 25° 140 MPH
25 - 40° 125 MPH
Max Landing Gear Operating Speed Vlo 125 MPH
Max Landing Gear Extended Speed Vle 150 MPH
Max Structural Cruising Speed Vno 190 MPH
Enroute Climb Speed 120 MPH
Approach Speed 115 MPH
Final Approach Speed 90 MPH
Never Exceed
Vne 217 MPH
Demonstrated Crosswind Component 12 MPH