Leeham News and Analysis
There's more to real news than a news release.
Bjorn’s Corner: Aircraft stability, Part 2
By Bjorn Fehrm.
April 20, 2018, ©. Leeham News: In the last Corner, we discussed how to stabilize an aircraft in pitch so it could fly stably straight ahead. For this, we needed a horizontal tail which had a negative lift.
This will buy us a short-term pitch stability, but not a long-term one. Why we will explain in this Corner.
Figure 1. The long-term pitch instability, Phugoid. Source: Leeham Co.
Narrowbody and Widebody engine developments, Part 2
By Bjorn Fehrm
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Introduction
April 19, 2018, © Leeham News: In an article last week, we discussed the reason the new narrow-body engines are catching up to the fuel consumption of the wide-body engines.
Today we dig a bit deeper into the efficiency changes of the different engines and discuss which parameter changes have caused what changes in engine efficiency.
We will use our engine modeling software GasTurb to analyze what happens in a Turbofan when we change certain parameters.
Summary:
- The engine’s Core or Thermal efficiency changes with Turbine Entry Temperature (TET).
- To fully utilize such an increase in efficiency we need to adapt the overall design of the engine.
Indigo, India’s market-leading airline
By Bjorn Fehrm
April 18, 2018, ©. Leeham News: Indigo started its operation 2006, offering low-cost air travel to the masses in India. The year after, Air India and Indian Airlines, the state-owned flag International and Domestic carrier, merged to form India’s largest airline at the time, Air India.
By the end of 2010, Indigo passed Air India and by 2013 Jet Airways for domestic passenger market share, a position it has kept since.
Airbus investment resets the clock on CSeries
Special to Leeham News
By Olivier Bonnassies
Airfinance Journal
April 17, 2018, (c) Airfinance Journal, Montreal: Aviation Week & Space Technology managing director technology Graham Warwick believe the acquisition of a 50.1% stake into Bombardier’s CSeries will give the program opportunities in many areas.
Talking at the Innovation Aerospace Forum in Montreal, Warwick says Airbus expertise in marketing, sales and support will be “immediate benefits” to the CSeries program.
Warwick recalls that Airbus is into its second iteration of the Airbus A320 program, whilst Bombardier’s CSeries is a new product.
“The CSeries is right at the beginning of its life. It clearly resets the clock for the CSeries and can even have a meaningful impact in the future,” he says.
Bombardier’s CSeries vice president program Rob Dewar says 29 CS100/300s are now in service with three customers: Air Baltic, Swiss and Korean Air.
The Canadian manufacturer continues to be pleased with the introduction into service.
Boeing to implement structural design change in 787-8 for production commonality
April 17, 2018, © Leeham News: Boeing will implement a manufacturing shift later this year designed to bring the 787-8 into more conformity with the production of its larger siblings, the 787-9 and 787-10.
Boeing 787-8. Source: Boeing.
The move, involving the aft fuselage production, will reduce costs and increase commonality between the first family member and the two larger models.
The plan was first reported by David Wren of the Charleston Post and Courier.
The 787-8 became Boeing’s problem child, plagued by design and production issues that caused the entry into service to be nearly four years late. Cost overruns in the program peaked at $30bn+ in deferred production and tooling costs. Boeing will be reducing these costs for the next decade.
Air Canada sees secondary airport need for NMA
Special to Leeham News
By Olivier Bonnassies
Airfinance Journal
April 16, 2018, (c) Airfinance Journal, Montreal: Air Canada sees the potential of a new midsize aircraft (NMA) in its fleet to avoid congested airport.
“There is a difficulty in getting slots at key airports in key times,” Calin Ravinescu, Air Canada president and chief executive officer, said at the Innovation Aerospace Forum in Montreal.
Airlines need OEM choices: Air Canada
Special to Leeham News
By Olivier Bonnassies
Airfinance Journal
April 16, 2018, (c) Airfinance Journal, Montreal: The commercial aircraft manufacturing industry could head into a scenario with two major alliances: Airbus/Bombardier rivaling Boeing/Embraer, but for Air Canada, airlines need to have choices.
Calin Rovinescu, president of Air Canada. Photo via Google images.
“This is a terrific double-edge sword. Airlines definitively need to have choice,” said Calin Ravinescu, Air Canada president and chief executive officer at the Innovation Aerospace Forum in Montreal.
Ravinescu says the idea of a single source supply is not acceptable for maintenance prospective and from a customer service prospective.
“I am totally against any notion of single sourcing, or any component in any aircraft in any circumstances. Just like our customers, airlines expect competition is the aerospace and the aircraft space.
Déjà vu all over again
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Introduction
April 16, 2018, © Leeham News: There’s high turnover in the executive ranks. Major delivery delays cause disruption and unhappy customers. Airlines are cancelling and switching orders. Product strategy is challenged. Your competitor is taking advantage and making significant inroads.
If this sounds familiar, it is.
It’s déjà vu all over again.
Pontifications: Shooting yourself in your feet
By Scott Hamilton
April 16, 2018, © Leeham News: Airbus’ new top sales chief, Eric Schulz, was candid about losing American and Hawaiian airlines wide-body orders, according to a report from Flightglobal from the Airbus annual meeting.
In reference to Hawaiian’s switch of an A330-800 order to the 787-9, he admits: “Maybe we did not see the danger coming…we may have made the conclusion a bit too early that the best solution was to stick with us – which I think it was,” Flightglobal wrote.
American’s loss, Schulz told Flightglobal, was for a different reason: American was “already very heavily engaged” with the 787, adding: “I knew exactly where our competitors had to go in terms of pricing. I’m certain American did a good deal.”
I thought American and Hawaiian were predictable outcomes. But Airbus’ problem went beyond not seeing the “danger.”
FAA AD may severely limit ETOPS of some RR-powered 787s: sources
British Airways Boeing 787 without engines on the Boeing Paine Field line. Photo taken April 12 by Jennifer Schuld.
April 14, 2018, © Leeham News: An airworthiness directive from the US Federal Aviation Administration is expected as early as Tuesday that could severely restrict flight operations some of Rolls-Royce-powered Boeing 787s.
The AD is expected to require inspections and a reduction in the ETOPS long-range operation to 140 minutes from the nearest airport from 330 minutes, sources say. Inspections have to be made by May 20, according to preliminary information. If inspections fail, ETOPS may be reduced to 60, two airlines tell LNC. A third source didn’t have the numbers but said the AD is expected to be “onerous.”
Until the AD is issued and published, the numbers and conditions could change, one source tells LNC on background.
EASA, the European safety agency, issued its AD yesterday, with an April 20 effective date.
About 25% of the 787s are powered by Rolls-Royce engines, but not all engines are affected.