What is Vmc
Calibrated airspeed at which, when the critical engine is suddenly made inoperative, it is possible to maintain control of the airplane with the engine still inop and maintain straight flight with an angle of bank not more than 5 degrees
What is P-Factor
- The downward descending blade takes a larger “bite” out of the air, creating more thrust
- This creates YAW
What is Accelerated Slip Stream
- The increased airflow creates more lift, the more lift creates a roll. The more thrust creates the Yaw
- Creates Roll & Pitch
What is Spiraling Slipstream
- Using Bernoulli’s Principal, the low pressure made on the faster moving air mixes with the higher pressure air from the slower moving air. This creates the “corkscrew” effect that hits the vertical stabilizer
- Creates Yaw
What is Torque
- Newton’s 3rd law, opposite and equal reaction. Engine spinning to the left, will make the plane want to roll right, and vice versa
- Creates Roll
What is the Critical Engine
- The engine, if failed, will have the most adverse effect on direction control.
- Why? This is due to PAST
Accelerate-Stop Distance
The distance travelled that when reach Vr, losing an engine, and coming to a complete stop
Accelerate-Go Distance
The distance required to accelerate to rotation speed, and assuming an engine failure at rotation, climb to 35’ above the
departure end.
Service Ceiling
The density altitude which will produce a 100 foot per minute climb when flying in a clean configuration, at the best rate of
climb airspeed with both engines at maximum continuous power.
Single-Engine Service Ceiling
The altitude that a twin engine airplane can no longer climb at a rate greater than 50 fpm with one
engine inoperative.
Absolute Ceiling
The altitude at which a climb is no longer possible.
Single-Engine Absolute Ceiling
The altitude that a twin engine airplane can no longer climb with one engine inoperative.
Also known as Drift Down Altitude
Critical Altitude
The maximum altitude under standard atmospheric conditions at which a turbocharged engine can produce its rated horsepower.
Above this altitude, the engine‘s performance will begin to decrease.
Conventional Twin
A twin-engine aircraft that has both propellers rotating in the same direction (usually clockwise as viewed from the cockpit)
What are the Drag Factors for the Seneca II
- Flaps 25: -240fpm
- Flaps 40: -275fpm
- Windmilling Prop: -200fpm
- Gear Extended: -250fpm
