Multi Engine Concepts
Define Critical Engine
The engine whose failure most affects the performance or handling characteristics of the airplane
What is most important in single engine operations
Maintaining directional control; obtaining the most performance of the aircraft
What is the horsepower of the Seminole engines
180
True or False
As altitude increases, Vmc decreases
True
Define Single Engine Service Ceiling
The altitude that a twin-engine airplane can no longer climb at a rate greater then 50 f.p.m. with one engine inoperative.
What is Asymmetrical Thrust
A tendency for an aircraft to yaw to the left due to the descending propeller blade on the right producing more thrust than the ascending blade on the left. This occurs when the aircraft’s longitudinal axis is in a climbing attitude in relation to the relative wind. The P-factor would be to the right if the aircraft had a counterclockwise rotating propeller.
What is CFIT
Controlled flight into terrain
Why do we have to feather the propellers before 950 RPM
Pins and centrifugal springs engage below that rpm
In an airplane with standard engine configuration, which engine is the critical engine
The right engine
What is Accelerate Stop Distance
The "accelerate/stop distance" is the total distance required to accelerate the twin engine airplane to a specified speed and, assuming failure of an engine at the instant that speed is attained, to bring the airplane to a stop on the remaining runway
Define Vmc
Vmc is the speed below which aircraft control cannot be maintained if the critical engine fails under a specific set of circumstances
What percentage of aircraft accidents is attributed to pilot related causes
80%
How much fuel does the Seminole hold when tanks are full
110 gal, 108 gal usable
In an engine out situation, how can sideslip be eliminated to improve performance
Bank 5 degrees into the operating engine, half a ball slip towards the operating engine
What is Vsse
Minimum safe single-engine speed (multi). Provides a reasonable margin against an unintentional stall when making intentional engine cuts during training.
Why do we lose 80% performance when we lose one engine
Loss of excess horsepower needed to keep the aircraft flying
What is situational awareness
Situational awareness is defined as the “perception of environmental elements and events ” In other words, situational awareness is the ability to know and understand what is going on around you.
What are the Seminole flap settings
10, 25 and 40 degrees
When an engine fails, which occurs first, Roll or Yaw
Yaw, then roll
Define Excess Horsepower
The difference between the power available and the power required at a particular speed and height. It is a measure of the rate of climb and acceleration.
How do we verify which engine failed
Dead foot, Dead engine; yawing moment towards the dead engine
What are the five steps in the ADM process
Recognize a change
Define the problem
Choose a course of action
Implement your decision
Monitor the outcome
What three conditions will give a gear warning alert
(a) The gear is not locked down and the manifold pressure has fallen below 14 inches on either one or both engines.
(b) The gear selector switch is in the UP position when the airplane is on the ground.
(c) The gear selector switch is in the UP position and wing flaps are extended to the second or third notch position.
How does shift in CG affect Vmc
The more forward the CG, the lower Vmc
Define climb gradient
By definition, the Climb Gradient is the ratio between the distance covered over the ground and your Altitude/ Height gained.
This ratio (the Climb Gradient) is expressed as a percentage.