Leeham News and Analysis
There's more to real news than a news release.
AirAsia A320 disappears en route in bad weather, but weather won’t be only area of investigative focus
Dec. 28, 2014: Weather will be a prime area of focus by investigators of the disappearance of AirAsia flight QZ8501. The flight, an Airbus A320-200 manufactured in 2008 and powered by CFM 56 engines, deviated from its intended flight path due to weather conditions, according to reports from officials in Indonesia.
It’s presumed the airplane’s disappearance is an accident.
With these reports, investigators will put weather conditions at the top of their list of areas to probe. They will attempt to determine whether there was a high altitude upset due to turbulence that caused the plane to lose control; whether the plane was intact when it presumably crashed into the sea or whether it came apart in flight, and if so whether this possibility was caused by stresses beyond design limits. Investigators will attempt to determine whether the plane was struck by lightning, causing a chain of events leading to a crash.
Looking ahead in 2015 in commercial aviation
Here’s a visualization of events to look for in commercial aviation in 2015.
Click to enlarge for crisp view.
737 MAX 8 could be enabler for some LCC Long Haul
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By Scott Hamilton and Bjorn Fehrm
Introduction
Figure 1. Nominal range of 737 MAX 8 from Oslo Source: Great circle mapper, Boeing. Click on Image to enlarge
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.
Summary
- We based our analysis on our proprietary, economic modeling, assumed Norwegian cabin configuration standards.
- We compared the operating costs of the 737-8 with Norwegian’s present long haul aircraft 787-8 in a similar cabin configuration.
- The comparison range is the max endurance range for an LCC long haul 737-8, eight hours or 3,400nm air distance (no wind included).
Fundamentals of airliner performance, Part 5; Approach and landing
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:
- For high speed operation the pilots fly on Mach as this gives him maximum information around possible effects on the aircraft when he is close to the high speed limit, the maximum Mach number. Beyond this the aircraft gets into supersonic effects like high speed buffeting or unsteady flight.
- For operations under the cross over altitude for Mach 0.78 to 300 kts IAS the pilot flies on Indicated Air Speed (IAS) which gives him maximum information how the aircraft reacts should he go close to the aircraft’s lower speed limits.
Lets now start to go through the steps that our 737 MAX 8 performs after leaving its cruise altitude.
Oil heading toward $40? Economist still thinks so, with caveats; and: NTSB issues 787 battery report, Azul’s A320/CFM order
Dec. 1, 2014: Adam Pilarski, an economist for the consulting firm Avitas, predicted several years ago that the price of oil would drop to $40bbl. Few believed him.
Oil hit $66 this week, on a steady decline over the past months, and, according to an article by Bloomberg News, could be on its way to $40.
Pilarski, who originally made his prediction in 2011 at a conference organized by the International Society of Transport Aircraft Traders (ISTAT). He predicted this price by October 2018.
In an interview with Leeham News today, Pilarski concurs that oil may hit $40 soon, though he believes the low end will be in the $40-$50 range. The low price will not for the reasons he outlined in 2011 and neither will it stay at or near $40 for long.
Fundamentals of airliner performance, Part 4
By Bjorn Fehrm
Nov. 25, 2014: In our article series around the performance of a modern airliner we have now come to the climb after takeoff. We started with cruise as this was simplest because the aircraft is flying in steady state, then we looked at the modern turbofan and how this is affected by both altitude and speed. We then examined how this affects the takeoff and today we continue with the climb after takeoff.
Before we start, let’s sum up a few points we need for today:
- Drag is the one thing we always need to be aware of as this regulates how much excess power we have in different flight situations and therefore if we can stay on our altitude or climb.
- Drag diminishes with altitude as the airs density diminishes and thereby our dominant drag component, air friction against our aircraft’s skin. This is the major component of the aircraft’s dominant drag, parasitic drag.
- Our lift force is generated by forcing air downwards and this causes induced drag as this downwash cost energy to generate and maintain. Induced drag is mitigated by a wing with a large span.
Lufthansa to use A340s in “lower cost” operation; our analysis against the 787
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By Scott Hamilton and Bjorn Fehrm
Introduction
Low cost long haul service is gaining traction, but previous efforts proved difficult to be successful.
Dating all the way back to Laker Airways’ Skytrain and the original PeoplExpress across the Atlantic, airlines found it challenging to make money.
More recently, AirAsiaX retracted some of its long-haul service, withdrawing Airbus A340-300 aircraft when they proved too costly. The airline recast its model around Airbus A330-300s as an interim measure, unable to fly the same distances as the longer-legged A340. AirAsiaX ordered the Airbus A350-900 and now is a launch customer for the A330-900neo.
Cebu Pacific of the Philippines is flying LCC A330-300 service to the Middle East. Norwegian Air Shuttle famously built its entire LCC long haul model around the Boeing 787, initiating service with the 787-8 and planning to move to the 787-9.
Canada’s WestJet is leasing in four used Boeing 767-300ERs to offer LCC service,
Legacy carrier Lufthansa Airlines plans to use fully depreciated A340-300s to begin “lower cost” (as opposed to “low cost”) long haul service. LH says the fully depreciated A340s come within 1%-2% of the cost per available seat mile of the new, high capital-cost 787s.
Summary
- AirAsiaX’s A340 LCC long haul service proved unprofitable. Can Lufthansa’s similar service with fully depreciated A340s work?
- Our analysis shows that it can. It can even support the lease rates that would be charged for a 10 year old A340 if the fuel price remains at the present level.
- When doing the research for this article and going through the results of our proprietary model we started to ask ourselves, is the A340-300 the ugly duckling of the airline market?
Fundamentals of airliner performance, Part 3
By Bjorn Fehrm
In our first article about how to understand the performance of a modern airliner we defined the main forces that are acting on an aircraft flying in steady state cruise. In our clinic we use the ubiquitous Boeing 737 in its latest form, the 737 MAX 8, to illustrate our case.
In the second article we introduced the aircraft’s engines and understood how they function by pumping air backwards faster than the aircraft’s speed and therefore generating thrust as air is in fact quite heavy. We also looked at the influence of flight altitude on the performance of the aircraft.
In short we can conclude our findings so far:
Having covered the most important aspects of cruise we will today look at takeoff, a subject with a lot of aspects. Read more
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Posted on November 19, 2014 by Bjorn Fehrm
Boeing, CFM, Leeham News and Comment, Uncategorized
737 MAX, Boeing, CFM, CFM Leap-1B