What is the difference between CFM LEAP 1A and 1B?
Fan Diameter: The LEAP-1B has a smaller fan diameter (69. LEAP-1A (78 inches), reflecting its application on the narrower 737 MAX. Specific Design Features: Bypass Ratio: The LEAP-1A and LEAP-1C (for COMAC C919) have a bypass ratio of 11:1, while the LEAP-1B has a bypass ratio of 9:1. How does the CFM LEAP-1B engine achieve the same efficiency as the LEAP-1A despite its lower bypass ratio? The CFM LEAP engine comes in 3 variants (1A, 1B, 1C). The larger LEAP-1A and LEAP-1C variants have bypass ratios of 11:1, while the smaller LEAP-1B only has a bypass ratio of 9:1.
Who makes the CFM LEAP 1A?
LEAP-1A/-1B The LEAP engine family from CFM International—a consortium comprising GE Aerospace and Safran Aircraft Engines—includes three different models covering a thrust range from 23,000 to 35,000 pounds. Among the aircraft they power are the Airbus A320neo and the Boeing 737 MAX. GE Aircraft Engine’s GE90-115B engine powers the 777-300ER. Each engine produces 115,000 pounds of thrust — nearly a quarter of a million pounds of total thrust for the airplane. By comparison, the original 777 had 75,000 pounds of thrust per engine.
Who makes the CFM Leap 1A engine?
LEAP-1A/-1B The LEAP engine family from CFM International—a consortium comprising GE Aerospace and Safran Aircraft Engines—includes three different models covering a thrust range from 23,000 to 35,000 pounds. Among the aircraft they power are the Airbus A320neo and the Boeing 737 MAX. The CFM International LEAP (Leading Edge Aviation Propulsion) is a high-bypass turbofan engine produced by CFM International, a 50–50 joint venture between the American GE Aerospace and the French Safran Aircraft Engines.
What is the bypass ratio of CFM LEAP?
It’s an important number that describes engine efficiency. CFM engines have grown from an initial bypass ratio of 5:1 in the 1980s to the LEAP engine, which has a bypass ratio of 11:1. An open fan could achieve a bypass ratio above 70:1. CFM quantifies how much air a fan can circulate in a given space. A higher CFM rating indicates a greater ability to move air, which is crucial in applications requiring efficient ventilation, cooling, or air circulation.
What is the spec of the LEAP 1A engine?
The CFM LEAP-1A is a high bypass ratio dual spool turbofan engine that powers the Airbus A320neo family. It has several thrust ratings between 23,000 to 33,000 lbs of thrust. The engine features a 3D woven carbon fiber composite fan and low pressure turbine powered by an 18 blade low pressure shaft. The LEAP engine features 18 fan blades, compared to 36 on the CFM56, and that’s by design. Thanks to 3D woven carbon fiber composite using RTM (Resin Transfer Molding) technology, we’ve made the fan blades both lighter and stronger.