# One engine Inoperative Condition:
With a multiengine airplane with all its engines operating, sideslip is eliminated by keeping the ball in the turn and bank instrument centered. This is called zero sideslip and is the condition where the airplane is presenting the smallest profile to the relative wind, creating minimum drag.
Because of the asymmetrical thrust, the centered ball is no longer an indication for zero sideslip if one engine fails.
Even with the ball centered, on a multiengine airplane producing asymmetrical thrust, we are still flying in a side slip due to the lateral force created by the rudder.
The only equipment that can indicate slip in an asymmetrical thrust condition is a yaw string attached to the windshield.
To achieve zero side slip with one engine inoperative we should use both rudder and ailerons.
Place 1/2-1/3 of the ball out of its cage towards the operative engine and use about 2° of bank towards the operative engine (“raise the dead” engine). The opposing forces of horizontal component of lift and rudder side force will eliminate the sideslip.
To get the updated and remaining notes of one engine inoperative, please click the below link or visit our new website aerospacenotes.com...
https://aerospacenotes.com/flight-dynamics/one-engine-inoperative/
Table of Contents:
- What Is One Engine Inoperative?
- One Engine Inoperative Flight Principles
- Counteracting The Asymmetrical Thrust At One Engine Inoperative Condition
- One Engine Inoperative - Asymmetrical Yaw