A ramjet generates no static thrust and needs a booster to achieve a forward velocity high enough for efficient operation of the intake system.

The engines produce a total of 36,000 horsepower and 19,000 pounds of static thrust.

For the same static thrust, a ducted fan has a smaller diameter than a free propeller, allowing smaller gear.

The heated compressed air then exits through the tailpipe providing static thrust of 180 kg (396 lb).

This engine was rated at 6,000 lbf (27 kN) static thrust at sea level.

In some engines, the net thrust at say Mach 1.0, sea level can even be slightly greater than the static thrust.

(2,675 kg) but was reported to have produced 30,000 lb (13,608 kg) static thrust with afterburner for takeoff.

Because of the high thrust lapse rate, the static (i.e., Mach 0) thrust is relatively high.

At maximum take-off power, the engine develops a static thrust of 41,500 lb (185.05 kN).

The key challenge in attaining supercruise is not simply attaining a high static thrust to weight ratio.