The J34-WE-34 puts out 3500 lbs thrust.  With afterburner on it puts out 5000 lbs + thrust,  this equates to around 9000+ horse power.

Developed by Westinghouse Electric Corporation in the late 1940s, the J34 engine was an enlarged version of the earlier Westinghouse J30. The J34 produced at least 3,000 lbs. of thrust (depending on engine series) and was twice as powerful as its predecessor. Several different series J34s were used in US Air Force experimental aircraft during the 1948-1953 period. A J34-WE-22, rated at 3,000 lbs. thrust, powered the tiny McDonnell XF-85 "Goblin." The McDonnell XF-88A used two J34-WE-15 engines, each rated at 3,150 lbs. thrust, while the XF-88B used two XJ34-WE-19s, each rated at 3,250 lbs. thrust. Power for the Douglas X-3 "Stiletto" was provided by two XJ34-WE-17s of 3,370 lbs. thrust each. The -15, -17, and -19 engines were fitted with an afterburner for additional thrust when needed.

SPECIFICATIONS Model: J34-WE-34 Compressor: 11-stage axial flow Turbine: two-stage axial flow Thrust: 3,500 lbs. (No afterburner) Thrust: 5,000 lbs+. (With afterburner) Weight: 1,200 lbs. Max. RPM: 12,500 Cost: US $68,000

How does a jet engine work?

The jet engine or, more correctly, the gas turbine is an internal combustion engine which produces power by the controlled burning of fuel. In both the gas turbine and the motor car engine, air is compressed, fuel is added and the mixture is ignited. The resulting hot gas expands rapidly and is used to produce the power.