Why do fighter jets have 2 engines?

Military fighters tend to favor a single engine arrangement for power to weight and specific fuel ratios which favor energy maneuvering. But performance requirement such as large combat radii or mission systems and stores carry combined with engine limitations often make a multi engine design attractive.

What jet does the Air Force use?

Air Force

How many fighter jets USA have?

Military > Air force > Combat aircraft: Countries Compared

What are the advantages of having twin vertical stabilizers on aircraft?

Having twin rudders increases the redundancy, which is important for combat aircraft in case of battle damage. Having twin vertical stabilizers helps in reduction in height, though this is mainly an issue with naval aircraft. As an example, both the S-3 Viking and A-5 Vigilante had to fold their vertical tails for fitting inside hangars.

Why do some fighter jets have two tails?

For example, preliminary designs of the A-5 Vigilante had twin tails, while the final design had a single tail, while it was the other way in case of F-14 Tomcat. one large tail produced more shear force at the root, 2 smaller tails mean less force at the vertical stabilizer root. This allows for a lighter structure

What happens if a twin engine aircraft fails?

If the single engine fails, the craft remains right-side up allowing easy ejection. In a twin-engine craft, the most obvious arrangement of lift vents is similar to the Harrier’s, but one front and one back per engine. If an engine fails in that configuration, the aircraft will roll, hard, making ejection risky or fatal.

Do all fighter jets have double vertical stabilizers?

Many fighter jets have double vertical stabilizers, e.g. F-14, F-15, F/A-18, F-22: On the contrary, most general aviation planes and commercial airliners do not. While there are certainly exceptions in both categories, I think it is fair to say that this design is, comparatively, far more common in fighter jets.