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The newest 737 variants, the
737 MAX family, are to feature
CFM International LEAP-1B
engines with a 1.73 m fan
diameter. These engines are
expected to be 10-12% more
efficient than the CFM56-7B engines on the
737 Next Generation family.
Original 737-200 cockpit
Classic 737-300 cockpit
Next Generation 737-800 cockpit
Flight systems
The primary flight controls are intrinsically safe. In the event of total hydraulic system
failure or double engine failure, they will automatically and seamlessly revert to control via
servo tab. In this mode, the servo tabs aerodynamically control the elevators and ailerons;
these servo tabs are in turn controlled by cables running to the control yoke. The pilot's
muscle forces alone control the tabs. For the 737 Next Generation, a six-screen LCD glass
cockpit with modern avionics was implemented while retaining crew commonality with
previous generation 737.
Most 737 cockpits are equipped with "eyebrow windows" positioned above the main
glareshield. Eyebrow windows were a feature of the original 707 and 727. They allowed
for greater visibility in turns, and offered better sky views if navigating by stars. With
modern avionics, they became redundant, and many pilots actually placed newspapers
or other objects in them to block out sun glare. They were eliminated from the 737
cockpit design in 2004, although they are still installed at customer request.
Boeing B737
June 2017
www.alliance-airways.net
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