Leeham News and Analysis
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Leeham News and Analysis
- Bjorn’s Corner: Air Transport’s route to 2050. Part 25. June 6, 2025
- New RISE powerplant benefits from decades of GE research and development June 5, 2025
- Engine makers emphasizing durability, reliability June 4, 2025
- Boeing CEO: Lessons learned are key to certification of 737-7/10 and 777X June 2, 2025
- Digital twin is a key to JetZero’s hopes for Blended Wing Body entry June 2, 2025
Could an NMA be made good enough? Part 6
By Bjorn Fehrm
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Introduction
April 27, 2017, © Leeham Co.: We have in several articles gone through the sizing of an NMA (New Midrange Aircraft). We looked at the fuselage, cabin, wings and engines. Now we will sum the exercises and look at the performance of the resulting aircraft.
Boeing is seriously considering launching an NMA. The key to the launch decision will be the airplane’s economics: for development and production as well as operation.
The idea is the NMA shall have “twin aisle comfort with single aisle economics.” We will now use or performance model to analyze if the final aircraft has these characteristics.
Summary:
- An NMA designed to the principles in our articles will have a seven abreast dual aisle cabin. The cabin will increase passenger comfort in the 200 to 260 seat range and speed ground operations.
- Careful design of the fuselage, paired with a modern wing and engines, would produce an NMA with “dual aisle comfort and single aisle economics.”
Could an NMA be made good enough? Part 5
By Bjorn Fehrm
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Introduction
April 20, 2017, © Leeham Co.: After defining the fuselage and wings, it’s now time for the engines. We go through the sizing criteria for engines for airliners and find the size of engine that is needed for the NMA.
The NMA will need engines which are larger than the single aisle engines for Airbus’ A320neo and Boeing’s 737 MAX. But they will be smaller than the next size up for modern engines, the GEnx-2B for Boeing’s 747-8.
Figure 1. The NMA takes more and more the shape of a 767 replacement (A United 767-200). Source: United
This means the NMA will need new engines, at least 50% larger than the present engines designed for A320neo and 737 MAX.
Summary:
- An NMA engine will be sized by V2 safety speed or Maximum Continuous Thrust (MCT) criteria.
- The normal Top of Climb (ToC) sizing point will be less stressing for a twin engine airliner like NMA.
Asian airline shift portends big ramifications
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Introduction
April 17, 2017, © Leeham Co.: A shift is underway among Asian airlines that could have ramifications for the airframe and engine manufacturers and, by extension, their suppliers.
It doesn’t appear, however, that aerospace analysts in the US and Europe realize this shift. At least none has written about it that we’ve seen among the research notes we receive.
Summary
- The creation of the Value Alliance of Low Cost Carriers brings together eight LCCs under one alliance.
- AirAsia faces a competitive threat.
- Full service carriers also face a threat, particularly those in Japan, concludes one aerospace analyst team in the region.
- Airbus, Boeing have a backlog of more than 1,000 airplanes with the VALCC group and hundreds more with other airlines.
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Could an NMA be made good enough, Part 4?
By Bjorn Fehrm
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Introduction
April 13, 2017, © Leeham Co.: Last week we finished the sizing of the fuselage for an NMA design. Now we continue with the wing. We go through the key parameters that will decide the performance of the wing and the aircraft.
The NMA is a critical design case. The performance envelope has to be just right. Too high and the economics of the aircraft won’t work, both for purchase price and operational costs.
Figure 1. The NMA takes more and more the shape of a 767 replacement (A United 767-200). Source: United
Summary:
- Wing design is the mixing of conflicting requirements to a successful compromise.
- The NMA wing will use the design principles of the Boeing 787/777X wings but will be different in area, size and plan-form.
- The wing is sizing the engines, something we will look at in the next article.
Delta reviewing Airbus wide-body order, but more is going on
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Introduction
April 12, 2017, © Leeham Co.: Delta Air Lines today said on its earnings call that it is reviewing its wide-body order with Airbus.
At face value, the Delta statement might seem alarming. But as so often becomes the case, the “review” may not be what it seems.
Summary
- There is more activity about fleet requirements than simply “reviewing” the wide-body orders.
- Delta’s preparing to issue an RFP for single-aisle Airbus A321neos and/or Boeing 737-9/10s.
- Boeing hopes Delta will be a launch customer for the MAX 10.
- The NMA/MOM aircraft could be involved.
Middle Eastern airline turmoil hits Boeing
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Introduction
April 10, 2017, © Leeham Co.: Tim Clark of Emirates Airline said the new breed of long-haul, low cost carriers are hurting EK’s load factors and yields.
Etihad Airlines’ business strategy of taking financial stakes in LCCs hasn’t produced the positive financial results desired.
Three big airlines, EK, EY and Qatar Airways, face over-capacity now compounded by electronic carry-on restrictions by the US and UK.
Figure 1. Click on image for a crisp view.
The thee carriers largely compete for the same connecting traffic through hubs only 72-235 miles apart (Figure 1). This is like having hubs in Milwaukee and Chicago (81 air miles apart) and Chicago-Detroit (237 air miles) with much, much smaller domestic catchment basins.
Summary
- Declining financial results for Emirates, Etihad.
- Deferring airplanes: 787s, 777X
- Long-haul LLC, Trump travel ban, poor investments hurt the airlines.
Could an NMA be made good enough, Part 3?
By Bjorn Fehrm
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Introduction
April 6, 2017, © Leeham Co.: After sizing the cabin of the NMA, the time has now come to size the fuselage. Can a fuselage be designed that gives an NMA “dual aisle comfort with single aisle economics”?
Figure 1. The NMA takes more and more the shape of a 767 replacement (A United 767-200). Source: United
We will investigate the dimensions, the drag and the weight of an NMA fuselage. It will be based on the cabin and design techniques we described in Part 2. We then compare the efficiency of the result with the fuselages of the Airbus A321LR and Boeing 767. This will show if the necessary efficiency can be achieved.
Summary:
- It’s possible to design a dual aisle fuselage with the same perimeter per seat abreast as a single aisle fuselage.
- This will make the central, cylindrical, section have competitive weight and drag characteristics.
- The larger diameter of the dual aisle fuselage will increase the size of the tapered front and rear sections however.
- It’s still possible for an NMA fuselage to be as weight-efficient as a single aisle fuselage, measured per transported passenger.
No new design needed for turboprops, says Bombardier
- Part 1, ATR, appeared last week. Today’s interview with Bombardier completes the two-part series.
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Introduction
April 4, 2017, © Leeham Co.: Bombardier doesn’t think a new, clean-sheet turboprop aircraft is needed any time soon, a position that stands in contrast with rival ATR.
Bombardier Q400.
Ross Mitchell, VP Commercial for BBD, believes the Q400 covers the turboprop segment from 70 to 90 seats and its operational flexibility covers everything airlines need today.
However, ATR has 85% of the backlog with BBD capturing the other 15%.
Still, Mitchell gives a strong defense of the Q400.
Summary:
Don’t believe everything ATR claims about operating cost advantages, BBD says.
BBD can move cockpit and wing production from Canada to lower costs—but where is the question.
Re-engining the Q400 isn’t in the cards, at least any time soon.
Could an NMA be made good enough, Part 2?
By Bjorn Fehrm
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Introduction
April 3, 2017, © Leeham Co.: In the first part of our investigation on how good an NMA can be, we explored low weight and drag fuselage design. We will now continue with the design consequences for the fuselage construction and the cabin.
What drives whether one goes for an Aluminum or CFRP (Carbon Fiber Reinforced Polymer) fuselage?
Figure 1. The NMA takes more and more the shape of a 767 replacement (A United 767-200 pictured). Source: United.
What will be the typical dimensions for an NMA fuselage and what will be passenger capacities?
Summary:
- An elliptical fuselage will force a CFRP design.
- The fuselage door configuration will be critical for cabin capacity and flexibility.
7M7 is key to Boeing’s future
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Introduction
An enthusiast’s concept of the Boeing 797. Image via Google.
April 24, 2017, © Leeham Co.: Boeing faces growing challenges this year as airplane sales slow, production of the 777 Classic declines, its new Global Services unit prepares to formally launch and a decision whether to authorize a sales offering for the New Midrange Airplane looms.
We’ve spent a lot of time covering slowing sales and declining 777 production. Tomorrow, we’ll have a special report on the ambitious Global Services strategy.
We’ve also spent a lot of time on the Boeing NMA. LNC’s Bjorn Fehrm last week presented number three in a paywall series on the NMA, looking at it from a technical viewpoint. We’ll take a look at it from a strategic point of view today.
Summary
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Posted on April 24, 2017 by Scott Hamilton
Airbus, Airlines, Boeing, Leeham News and Comment, Middle of the Market, MOM, Premium
737-10, 737-9, 747-8, 787, 787-8, 787-9, 7M7, A321LR, A321NEO, A330-200, A330-800, A380, A400M, Airbus, Boeing