What type of fuel is typically used in military helicopter engines?

Military helicopter engines typically use JP-8 jet fuel. JP-8 is a kerosene-based fuel that is designed to be versatile and suitable for a variety of aircraft, including helicopters. Its formulation includes additives that improve performance under various environmental conditions, such as lower temperatures and varying altitudes.

Using JP-8 provides several advantages in military operations, including a lower flash point, which facilitates easier engine starting and better overall performance in dynamic conditions. Additionally, JP-8 is compatible with ground vehicles, allowing for logistical efficiency in fuel supply when managing various types of military equipment.

In contrast, AvGas is primarily used in general aviation and not in military helicopters; Jet A is a commercial jet fuel primarily for fixed-wing aircraft and lacks certain military specifications; and diesel fuel, while used in some military vehicles and equipment, is not suitable for turbine engines typically found in helicopters.