March 01, 2019, ©. Leeham News: We now continue our discussion of the yaw stability of an airliner.
Last week we defined the basic conditions of yaw stability. The aerodynamic side force from an angled airflow stemming from an aircraft yaw angle or sideslip must be higher behind the center of gravity than ahead of the center of gravity.
This is why aircraft have a large vertical wing at the rear of the aircraft called the vertical tailplane. Figure 1.
Dec. 10, 2018, © Leeham News: The tanker wars may be back.
Airbus has teamed with Lockheed Martin to offer the Airbus A330-200MRTT to the Pentagon in a for-hire business model. The agreement also provides the prospect of “conceptualizing the tanker of the future.” (The press release is here.)
From 2001-2011, the US Air Force, Pentagon and even Congress were embroiled in controversy over recapitalization of the USAF aerial refueling tanker fleet.
After 9/11, Boeing proposed leasing 100 tankers based on the 767-200ER to the USAF. A scandal surrounding the USAF approval of this deal sent the air force’s procurement office and Boeing’s CFO to jail and resulted in the resignation of CEO Phil Condit. The lease deal was canceled.
Oct. 31, 2017: A new event, the Southeast Aerospace and Defence Conference (SADC) scheduled for June 25-27 in Mobile (AL), will examine the commercial, defense, space and corporate aerospace sectors in the US Southeast.
The conference is organized by Airfinance Journal and Leeham Co., the first joint venture between the two companies.
The US Southeast is a growing aerospace center. Defense and space clusters have decades-long histories in the Southeast. Corporate and commercial clusters are more recent developments, albeit in some cases now well within a second decade.
Airbus’ A320 family Final Assembly Line in Mobile opened in September 2015. The FAL is producing 3.5 A320s per month and will reach its initial target of 4/mo by year end, slightly ahead of schedule. There is land capacity to expand to 8/mo.
Earlier this month, Airbus and Bombardier announced that their new venture will establish an FAL in Mobile.
April 11, 2016, © Leeham Co.: The Government Accountability Office (GAO) concludes that the Boeing KC-46A aerial refueling tanker for the US Air Force has “challenging testing and delivery schedules” ahead in its annual review of the program.
It’s been a long, long time since I wrote about aerial refueling tankers. Having delved into this topic during the long-running saga of the USAF recapitalization effort, and the competitions between Northrop Grumman/EADS and later Airbus alone and Boeing, the topic had been beaten to death.
But as we who follow such things know, Boeing’s current effort to build the winning KC-46A for the Air Force has run into more than a few problems. These have led Boeing to be at least eight months late and write off $1.2bn pre-tax on the program.
And the problems aren’t over.
Oct. 27, 2015: Northrop Grumman, builder of the B-2 bomber in the USAF inventory, was awarded the contract to build the next generation long-range bomber, which is yet to be named. For the moment, we’ll call it the “B-3.” For now it’s official name is the Long Range Strike Bomber (LRSB).
The Seattle Times has this story.
This is a big blow to Boeing, whose declining defense business was already in trouble from defense cutbacks and previous contract losses. The contract is worth $80bn.
Boeing’s strategy in acquiring McDonnell Douglas Corp back in 1997 was to even the revenue stream between commercial and military, in which Boeing then had a small portion and MDC was predominately military. Boeing was a sub-contractor to Northrop on the B-2, gaining a lot of its composite experience there which ultimately benefited development of the 787.
Unless Boeing finds grounds to challenge the contract award, prevails and wins a second competition, its Defense unit will continue to shrink.
Goldman Sachs, as with many other investment banks, called this a big win for Northrop.
Sept. 21, 2015, © Leeham Co.: This Friday, Sept. 25, is the date that at long last, Boeing and the US Air Force expect the first flight of the KC-46A that is equipped with the fueling system.
A “bare” KC-46A made its first flight last December. Then it spent the next six months or so on the ground. First flight of the second KC-46A, the one with the fueling system, has been delayed several times. All the program margin is gone and it’s going to be a challenge for Boeing to stay on schedule to deliver 18 combat-ready KC-46As to the USAF by 2017–two short years away. To try and stay on schedule, Boeing started production of the the airplane concurrent with the flight test aircraft, a risky proposition that could result in major rework or other difficulties if Murphy’s Law comes into play.
The KC-46A is the successor to the KC-767 International tanker program, which was an industrial disaster. Only eight airplanes were produced, four for Italy and four
for Japan. It ran years late and hundreds of millions of dollars over budget. There were flutter and design issues. These problems became part of the risk assessment by the USAF in the KC-X competition evaluation between Boeing and Northrop Grumman/EADS–and one of the reasons why the Air Force selected the Northrop KC-330 offering (later named the KC-30).
Boeing successfully challenged the contract award and won the next round with what became known as the KC-46A. Boeing claimed it benefited from lessons learned from the KC-767 International program.
August 24, 2015, (c) Leeham Co. News that the US Federal Aviation Administration was surprised at the duration of the composite fire with the Ethiopian Airlines Boeing 787 in 2013 came as a surprise to the agency, but it shouldn’t have.
When fire tests were undertaken during the development of the 787, the FAA received comment that the fire testing standards weren’t what they should be from engineers. The FAA largely dismissed these concerns at the time.
More to the point: the take-off crash of a Northrop Grumman B-2 bomber, on which Boeing was a sub-contractor, burned for 24 hours. This should have been a clue to the FAA.
Leeham News and Comment published a long piece March 10, 2009, about composite and aluminum airplane fires after a Boeing 787 on final approach in Laredo (TX) caught fire. The plane landed safely, but the testing was set back months.
I’m reprinting that report in its entirety here.
June 25, 2015: We don’t often stray into military topics, usually confining ourselves to commercial derivative programs like the Boeing P-8 Poseidon, KC-46a, Airbus KC-330 and the like. But, of all places, Politico has an interesting three-screen piece about President Obama’s “Plan B” in case the talks with Iran fail over curbing its nuclear program.
Plan B calls for the prospect of a Northrop Grumman B-2 stealth bomber dropping a series Massive Ordnance Penetrators, or MOPs, on targeted Iranian nuke facilities to destroy them. The MOP is a super-bomb, but of non-nuclear design, that is so big and so powerful it can penetrates some 200 feet under ground before it blows up. Boeing designed the MOP.