💡CFM's RISE engine promises a 20% improvement in efficiency compared to current engines.
🔍Development of open fan engines dates back to the 1980s, but noise and reliability issues hindered their progress.
🚀Recent advances in technology and materials have made the RISE engine a possibility.
🔧CFM plans to have an engine ready for ground tests in the next few years.
✈️Airbus has already shown interest in using the RISE engine in its aircraft.
What is the bypass ratio of the RISE engine?
—The RISE engine could have a bypass ratio as high as 20:1, compared to the current maximum of around 12:1.
What were the main challenges with earlier open fan engines?
—Earlier open fan engines faced issues with noise and reliability, which hindered their development.
When will CFM have an engine ready for ground tests?
—CFM plans to have an engine ready for ground tests in the next few years.
Which aircraft manufacturer has shown interest in using the RISE engine?
—Airbus has shown interest in using the RISE engine in its aircraft.
What is the expected improvement in efficiency with the RISE engine?
—The RISE engine promises a 20% improvement in efficiency compared to current engines.
00:00- Boeing and Airbus have both upgraded the engines of their 737 and A320 families over the past decade.
01:08The CFM RISE engine is a central part of Boeing's strategy for a new airliner.
02:21Open fan engines, also known as propfans, were explored in the 1980s but faced challenges with noise and reliability.
09:49Safran and General Electric developed a new open rotor concept with reduced noise levels.
10:13The CFM RISE engine is based on this open rotor concept and aims for a 20% improvement in efficiency.
11:52CFM plans to have an engine ready for ground tests in the next few years, with flight tests to follow.
12:19Airbus is interested in using the RISE engine and will adapt an A380 test aircraft for flight tests.
