Timeline for Does the Boeing 737 MAX use electro-hydraulic actuators?
Current License: CC BY-SA 4.0
4 events
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| Sep 13, 2018 at 17:10 | history | edited | Ralph J♦ | CC BY-SA 4.0 |
Corrected the control/actuation of the Max spoilers.
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| Jul 8, 2017 at 21:28 | comment | added | Koyovis | Electrically commanded servo valves but powered by conventional hydraulic systems with high pressure lines running throughout the aircraft, is what I understand from the article. This is not the same as electrically actuated. The 737 family uses a common type rating, spoiler actuation is a 50 year old, proven design. The A320 fly-by-wire ailerons and elevators are hydraulically actuated.. | |
| Jul 8, 2017 at 21:18 | comment | added | PaNerdicon | Very close, but the spoilers are still hydraulically actuated. The actuators themselves are unchanged from the NG. The valves that allow pressure to reach the actuators are electrically controlled now instead of mechanically. The spoiler mixer referenced in your link controls valves the allow pressure to reach the actuators. Now that the valves are electric, ground and flight spoilers are controlled by the spoiler control electronics also referenced in your link. If the spoilers were electrically actuated, there would be no hydraulics required at all as is the case with 787 brakes. | |
| Jul 1, 2017 at 15:27 | history | answered | Ralph J♦ | CC BY-SA 3.0 |