Primo volo per 737 MAX


Per approfondire:

Trailing cones (or trailing wires as they are often incorrectly called or trailing static cones), were first developed and tested in the 1950s and 1960s as a simple means of calibrating the static pressure (altitude reporting) error of an aircraft's pitot-static system. It does this by giving an accurate measurement of the ambient atmospheric pressure (static pressure) well clear of the aircraft's fuselage. The trailing cone system trails generally 1 to 1.5 times the wing span length behind the aircraft[citation needed] via a high-strength pressure tube. Static pressure is measured forward of the cone by several static ports. The cone stabilizes and aligns the ports relative to the freestream airflow.

The FAA states in FAR 91: "Where precision flight calibrations are used to quantify or verify altimetry system performance they may be accomplished by any of the following methods. Flight calibrations should only be performed once appropriate ground checks have been completed. Uncertainties in application of the method must be assessed and taken into account in the data package.

Precision tracking radar in conjunction with pressure calibration of atmosphere at test altitude.
Trailing cone.
Pacer aircraft.
Any other method acceptable to the FAA or approving authority.

https://en.wikipedia.org/wiki/Trailing_cone
 
Grazie a uno dei nostri soci vi postiamo qualche foto dal cockpit :


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Rispetto all'NG cosa cambia?


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EI-MAW ha detto:
Daje, l'ho fatta io la foto e l'ho visto atterrare, era proprio così.
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La winglet è la split scimitar su entrambi le seminali e si vede anche bene. Lo si nota anche dal tipo di forma con cui si conclude la parte superiore che termina "slanciata all'indietro". A proposito di queste winglet, le ha adottate anche Neos sui suoi 737.

I-A320 ha detto:
Rispetto all'NG cosa cambia?


Inviato dal mio iPhone utilizzando Tapatalk
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A livello di impianti pare cambierà poco visto che i maggiori acquirenti del modello non volevano un nuovo Type Rating. È cambiata l'avionica con schermi più grandi ma niente EICAS per le ragioni di cui sopra. I veri cambiamenti sono aerodinamici per ciò che riguarda winglet e cono di scarico dell'APU che diventa più affusolato. Nuovi motori più grossi e potenti e, a causa di questo, carrello più alto.
 
Considerando le pochissime vendite, Boeing ha confermato che sta considerando la terminazione del 737 Max 7 con l'introduzione di una variante che sara' piu' grande dell'attuale 737 Max 9.

Boeing confirms review of two 737 Max variants

Boeing is considering options for augmenting the largest and smallest versions of the 737 Max with more competitive offerings that could be made ready long before more ambitious projects, such as the so-called Middle of the Market (MoM) concept, says vice-president and general manager Keith Leverkuhn.
The 180-seat 737 Max 9 is being outsold by a five-to-one margin to the Airbus A321neo. The 126-seat 737 Max 7 has attracted only 60 total orders by three customers and faces a re-energised challenge from the 135-seat Bombardier CS300, which is scheduled to enter service in the third quarter.
Both ends of the 737 Max portfolio could be expanded within the current product development cycle with larger and more capable versions, but so far no decisions have been made.
“The jury is still out,” says Leverkuhn, speaking to Flightglobal in his office over-looking the 737 assembly line in Renton, Washington.
The 737 Max 9 has been under severe pressure since it became clear that the market prefers the 2.4m-longer A321neo, with greater capacity to offer more seats and range than the Boeing alternative. Airbus has recorded 4,510 orders for all three variants of the A320neo family, including 1,108 for the A321. That compares to 3,090 firm orders overall for the 737 Max family, but only 223 firm orders for the 737 Max 9, according to Flightglobal Fleets Analyzer.
As sales pressure rose, Boeing started talking up the MoM concept, a clean-sheet aircraft with the range and seating capacity of a 767 and the operating economics of a 737-800. But the MoM would not be available until the mid-2020s. Now, Boeing’s product development teams are looking for option that could enter service much more quickly.
“Is there an interim step that could be made between where the Max sits today and when the Middle of the Market comes on board? Well, we’re looking at that,” Leverkuhn says.

Some analysts, including DVB Bank managing director Bert van Leeuwen, have doubted the feasibility of further stretching the 737 Max 9, already 50% longer than the original 737-100.
But Leverkuhn is encouraged that the market for the 737 Max 9 and the A321neo still represents a distinct minority in the single-aisle segment, with sales to date accounting for 17% of overall demand.
“The market understands the A321 is not a 757, the [Max]-9 is not a ’57,” he says. “So they might want more range in that space, too. But if there were something larger that kind of fit in there prior to the Middle of the Market, does that make sense? What could we do? What are the constraints on us? What are the constraints on the production system, the supply chain?
As Boeing works the answers to those questions, it is simultaneously looking to overhaul the lower end of the 737 Max portfolio, with a larger version of the 737 Max 7 with more seats and range, Leverkuhn says. Since the possibility surfaced nearly two weeks ago, two US-based airlines - Southwest and Delta - have expressed interest in the idea.
“That’s something that we might be able to do. If we can make that airplane a little bit bigger, what would the customers think?” Leverkuhn asks. “We’re not going to self-actualise. It’s going to be, what do the customers want, and, if we can get a really efficient long-range airplane with a couple more seat rows, does that create more traction in the market? And what we’re hearing is, yeah."
CORRECTION: A previous version of this story incorrectly reported the 737 Max 9 may be replaced. The 737 Max 7 is being reviewed for replacement with a larger version, but Boeing is reviewing options for adding to the 737 Max product line with an aircraft larger than the 737 Max 9.
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https://www.flightglobal.com/news/articles/boeing-confirms-review-of-two-737-max-variants-424861/
 
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