PISTONS

Question 1

Why is an Engine “critical”?

Answer 1

1. Due to P-factor

2. Slipstream effect

Question 2

Is there a critical Engine on a A340 and a B747?

Answer 2

Yes, Engine 1 or 4. It’s wind dependant
If nr 4 goes and the wind is coming from the right the wind will hit the tail plane and further turn the Aircraft to the right