Pratt & Whitney Canada JT15D Turbofan Engine

The JT15D is Pratt & Whitney Canada’s first turbofan engine, powering a wide range of light to mid-size business jets and military training aircraft since its inception in the 1970s. It continues to enjoy strong success as additional models are introduced that employ the newest technologies. This engine family includes 17 models, ranging from 2,200 to 3,400 pounds of thrust. The continued success of the JT15D stems from its impressive levels of reliability and durability.

Did you know?

With more than 6,600 produced, the JT15D has accumulated more than 41 million hours of flight time. Overhaul intervals exceed 10,000 hours.

About this engine 

This high-bypass turbofan Pratt & Whitney Canada JT15D is beautifully restored and on display in the Museum’s Cree Main Gallery, courtesy of our friends at Dallas Airmotive.
JT15D on Cessna Citation
Image Credit: JT15D on a Cessna 501 Citation, Creative Commons
Pratt & Whitney Canada JT15D
Specifications
Type: Turbofan
Length: 60.5 inches
Diameter: 27 inches
Dry weight: 630 pounds
Compressor: Axial flow LP, centrifugal flow HP
JT15D Diagram
Some air entering the compressor bypasses the turbine, making the turbofan a turbojet driving the fan. The ratio of air bypassing the engine core vs air passing through the core is the bypass ratio. Engines with more jet than fan thrust are low-bypass turbofans, while those with more fan thrust than jet thrust are high-bypass turbofans. Image Credit: Creative Commons