By Scott Hamilton and Bjorn Fehrm
Dec, 8, 2014:The Boeing 737-8 MAX is the successor to the 737-800 and has largely been thought of in this context.
Our analysis, prompted by Norwegian Air Shuttle (NAS) plans to use Boeing 737-8 MAXes to begin trans-Atlantic service on long, thin routes, comes up with a conclusion that has gotten little understanding in the marketplace: the 8 MAX has enough range and seating to open a market niche below the larger, longer-legged 757, and the economics to support profitable operations for Low Cost Carriers interested in some trans-Atlantic routes or destinations beyond the range of the -800.
By Bjorn Fehrm
Dec. 2, 2015: The time has now come to cover descent and landing in our articles around airliner performance. As many aspects of descent are similar to climb we will repeat a bit what we learned in Part 4:
Lets now start to go through the steps that our 737 MAX 8 performs after leaving its cruise altitude.
Nov. 30, 2014: MTU Investors Day: MTU is a major participant in engine development and supplies, participating on the GEnx, GTF and GEnx program. It’s also a member of the joint venture in International Aero Engines and it’s a major player in the aftermarket Maintenance, Repair and Overhaul (MRO) sector, providing a serious competitive alternative to the aftermarket contracts offered by the engine OEMs. Its held an investors day conference Nov. 25. Highlights included:
By Bjorn Fehrm
In our first article on how to understand the fundamentals that make up airliner performance we defined the main forces acting on an aircraft flying in steady state cruise. We used the ubiquitous Boeing 737 in its latest form, the 737 MAX 8, to illustrate the size of these forces.
Here a short recap of what we found and then some more fundamentals on aircraft’s performance, this time around the engines:
When flying steady state (Figure 1) we only need to find the aircraft’s drag force to have all important forces defined.
The lift force is given as equal to and opposite to the aircraft’s weight and the tail downforce that we need to add to this was small. We also presented the two classes of drag that we will talk about:
We could see that the aircraft’s flight through the air created a total drag force of 7900 lbf, Figure 2 ( lb with an f added as we prefer to write it as this is a force and not a measure of mass. Mass we denote with just lb or the metric units kg or tonne = 2205 lb).
We also learned that if the drag is 7900 lbf then the engine thrust is opposite and equal. It is then 3950 lbf per engine when cruising at our mean cruise weight of 65 tonnes or 143.000 lb on our 1000 nm mission. Drag due to size consumes 63% of our thrust and drag due to weight 37%. Read more
The 10th Chinese airshow at Zhuhai opened today. It was a day with fewer announcements than expected from the usual suspects (Airbus, Boeing…) but the Chinese industry did not disappoint. China is now showing more and more of its coming might as a player on the aeronautics arena.
The most prominent displays at this show were on the military side, where China has two stealth aircraft projects flying (the large Chengdu canard J-20 and the smaller Shenyang J-31) while their canard Chengdu J-10 was flying the display circuits overhead (Figure 1).
All aircraft are of latest structural and aerodynamic design if not in engines and systems. This is a big difference to previous shows where the Russian Sukhoi and MIG aircraft and their local copies did the flying display until 2008. Since then everything has changed and now China and USA are the only countries in the world with two different stealth designs flying. USA has one in operation (F-22) and one close to (F-35) whereas China still has many years to go until they have their new aircraft operational. But it is significant that the old aeronautical behemoths Europe and Russia have none respective one (PAK-50) stealth fighter in flight test.
By Bjorn Fehrm
Over the last weeks we have looked at Boeing’s 757 replacement possibilities on its long and thin network niche, including a ground breaking launch interview for the A321neoLR with Airbus Head of Strategy and Marketing, Kiran Rao. In the series we have seen that the A321neo has the potential to replace the 757-200 on long and thin international routes. Boeing’s equivalent single aisle entry, 737 MAX 9, has problems to extend its range over 3,600nm. It is too limited in the weight increase necessary to cover the longer range.
Many have asked how the less- restricted Boeing 737 MAX 8 would fare, suitably equipped with the necessary extra tanks. This is the subject of this week’s sequel on the theme long and thin. At the same time we look at Airbus entry in this segment, the A320neo, to see how it stacks up to the 737 MAX 8, both in their normal 1,000 to 2,000nm operation and then also in a long and thin scenario.
Let’s first summarize what we found so far in our four articles around the Boeing 757 and its alternatives:
787 donation: The Boeing Co. handed over 787 test airplane #3 (ZA003) to the Museum of Flight Saturday in an elaborate ceremony marking an unprecedented donation of a modern airliner to an aviation museum.
To be sure, the donation was made possible by the fact that ZA003 (and 002 and 001) can’t be sold due to the massive rework necessary, and these three airplanes have been written off for more than $2bn. But this doesn’t make the event any less significant.
Now open to all Readers.
Boeing is looking at a number of scenarios for its New Airplane Study (NAS) that would replace the 757 and 737, have ranges from 4,000nm-5,000nm, and carry as few passengers as 130 or as many as 240.
To cover this broad range of demands could require reverting back to the 1980s when Boeing simultaneously developed two airplanes serving very different missions, the 757 and 767, that shared cockpits and some other common elements.
Boeing faces some hard decisions in the coming years, as Airbus outflanks Boeing in the single-aisle sector with the A320neo family and its latest offering, the A321neoLR. Our analysis and sales figures show the 737 MAX falling further and further behind in market share as MAX 9 lags vis-à-vis the A321neo.
We spoke with Kourosh Hadi, director of product development at Boeing, during a break at a conference last week organized by the British American Business Council-Pacific Northwest, and covered this and a number of other topics.
By Bjorn Fehrm
Part 3 of 3
In Part 2 of our three-part 757 Replacement analysis, we took a close look at Airbus’ new 97 tonne take-off weight A321neo, revealed in a world exclusive by Leeham News and Comment October 21. We analyzed the A321neoLR’s capabilities and limitations when compared to Boeing 757-200W and we saw that it could do the international flights that the 757-200 does with about 25% better efficiency. In this final Part 3, we will now compare the 757 and A321neoLR against what can be Boeing’s reaction, a clean sheet New Single Aisle, NSA, or New Light Twin Aisle, (NLT). First the conclusions from Part 2:
For Part 3 we can summarize:
By Bjorn Fehrm
Part 2 of 3
In Part 2 of our three-part 757 Replacement analysis, we take a close look at Airbus’ new 97 tonnes take off weight A321neo, revealed by Leeham News and Comment October 21. We call the 97t airplane the A321neoLR (Long Range); Airbus has yet to name the aircraft, which it began showing to airlines last week.
We analyze the A321neoLR’s capabilities and limitations when compared to the aircraft it intends to replace, the Boeing 757-200W. We have chosen to do so using a real airline configuration as opposed to an OEM’s typical seating layout. By comparing the 757-200W and the A321neoLR over the route structure that United Airlines is using the 757 today, we can better see the characteristics of the A321neoLR and what operational consequences the differences between the types would mean for the airlines. Before we start, a short recap of Part 1 about the 757 and its replacement candidates. Here is what we found:
Summary, Part 2
In the final Part 3, will look at Boeing’s alternative to an A321neoLR, a clean sheet New Single Aisle (NSA) and a prospective Small Twin Aisle (STA) design and how much such an approach would surpass the A321neoLR on medium and long haul networks and when it could be available.