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A live axle is when the two wheels rotate together. Its function is to reduce shimmying. The Lockheed JetStar and the Space Shuttle Orbiter have live NLG axles. References: Source: Aircraft Landing Gear Design: Principles and Practices The nose wheel is a split, forged aluminum alloy design but its bearings are located on a rotating or "live" axle ...


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A fix Nose Landing Gear is a landing gear where the vertical axe between the aircraft and the wheel cannot rotate. The wheel can rotate of course on an horizontal axe (it is how it moves on the ground), but it can not rotate on a vertical axis. This mean that if you try to change your direction on the ground, the wheel will remain in the axis of your current ...


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Unfortunately the short and simple answer is money. They weren't prepared to spend the money on a costly redesign of the already proven 737NG fuselage. The best in depth explanation I've seen of the whole issue with the MAX is: "How the Boeing 737 MAX disaster looks to a software developer".


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The technical answers above are fairly good, but probably the biggest answer is that Boeing corporate out in Chicago was simply too miserly to invest in a clean sheet airplane (which it could have EASILY done) and demanded that Boeing Commercial Airplane develop this new medium range airliner on a limited budget within a limited time span. The 737 MAX ...


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Boeing's main problem was time to market - they were in a tremendous hurry to compete with the latest Airbus. Re-engineering the undercarriage would have been more complex and taken a lot longer than adjusting the design of the new engine pylons. Perhaps ironically, the latest Max 10 has had the time to develop an extending undercarriage, giving it 9 inches ...


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Because lengthening the main gear struts constitutes an almost complete structural re-design of the main wing structure, with dramatic consequences on cost, lead time, re-certification, weight increase etc. The main landing gear of most swept back winged aeroplanes retract behind the rear spars, in the kinked section close to the fuselage. Picture above is ...


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There is a limit to what can change on an air-frame before being considered a new aircraft. I mean new as in a whole new designation. That means a whole new approval cycle that may or may not be approved by the FAA or international organizations. Moving a pivot point is not a simple task, there is a lot of structure to move. If you move structure there is ...


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The main gear sits between the wings and retracts inwards, such that the wheels will rest in the lower fuselage. Lengthening the main gear would either require to shift the gear attachment points outward or to retract one leg a bit forward and the other a bit backwards, such that both wheels will sit behind each other instead of side-by-side, as they do now -...


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The fuselage is not wide enough and therefore there is not enough space in the wheel well to store two main gears, had they been extended further. MAX 10 employs a new landing gear design that shrinks the legs slightly, but even that is just on the limit of what is possible, so if Boeing increased engine size for all models and used that mechanism for MAX 7,...


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