May 9, 2019, © Leeham News: D-Day is June 6, 1944. The start of the Berlin Air Lift is June 24, 1948.
The Historic Flight Foundation (HFF), located at Paine Field, Saturday afternoon embarks on a multi-week trip from Paine to England in its historic Douglas DC-3.

This Douglas DC-3, owned by the Historic Flight Foundation, saw service in World War II in the Pacific theatre. It leaves Saturday for Europe to participate with about 30 other DC-3s/C-47s in ceremonies for the D-Day invasion of Europe and the Berlin Air Lift. Photo by Scott Hamilton.
The trip includes 54 flying hours, event and rest stops along the way and rendeveouing with 30 more DC-3s/C-47s, D-Day events in France and Air Lift events in Berlin.
HFF’s DC-3 didn’t participate in the European theatre of war, but it is an historical airplane. It was in the Pacific theatre, operated by CNAC, a Chinese airline in which Pan American World Airways had a financial interest. The airplane is decked out in period Pan Am colors.
For HFF founder John Sessions, this trip is especially significant. He was nearly killed in the crash of another HFF plane he was piloting last August at the Abbottsford Air Show. His left leg was amputated below the knee.
Now fitted with a prosthetic lower leg and foot, Sessions returned to flight status just a week ago after going through flight testing, including on the DC-3.
Feb. 11, 2019, © Leeham News: Few airplanes truly can be called revolutionary. Most are evolutionary.
The Boeing 747 was one of those that falls into the former category.
Just as the Boeing 707 revolutionized air travel, so did the 747.
The spaciousness and, after a period of engine difficulties, the economics put the 747 into a class by itself.

December 14, 2018, ©.Leeham News: Last week we introduced a horizontal stabilizer to make our DC-9 like aircraft stable in pitch. We got a pitch moment curve which was forcing the nose down of the aircraft if there was an increase in Angle of Attack (AoA) of the aircraft. Should the angle of attack decrease from a trimmed position, the aircraft would put the nose up to correct the disturbance. The aircraft is stable in pitch.
Now we take a closer look at how such a horizontal stabilizer is made and why.

Figure 1. The pitch moment coefficient curve of an earlyDC-9 candidate. Source: Stanford University.
June 11, 2018, (c) Leeham News: In a change of pace, here are a number of photos gathered from recent visits to museums in the US and Canada.

Lockheed L-1049 Constellation of the Airline History Museum of Kansas City Downtown Airport, Photo by Scott Hamilton.
The Lockheed L-1049 Constellation of the Airline History Museum in Kansas City is labeled the Super G, but it actually is an H model, delivered as a passenger/freighter. It was restored to G markings in TWA colors. The airplane was airworthy until 2007, when an engine fire prompted the museum to park the airplane. AHM hopes to restore the airplane to flying operation.
April 23, 2018, © Leeham News: Last week’s engine malfunction on a Southwest Airlines Boeing 737-700 was another in a rare, but not unknown, uncontained engine anomaly in recent years.
All recent similar failures didn’t cause a loss of life or serious injuries if the passengers were evacuated. Unfortunately, this accident caused one fatality and seven injuries.
Let’s put the context to this issue.
John Leahy, the chief operating officer-customers for Airbus, will retire in January after 33 years with the company. LNC’s editor, Scott Hamilton, has known Leahy for most of this time. This is the second of a series of reports derived from interviewing Leahy about his pending retirement. The first article appeared Nov. 28.
By Scott Hamilton
Dec. 14, 2017, © Leeham Co.: When John Leahy was promoted from his position as head of Airbus sales in North America and moved to headquarters in Toulouse,
John Leahy, COO-Customers Airbus. Reuters photo via Google images.
France, to assume the world-wide position as head of sales, he had an ambitious goal to achieve 50% market share by 2000.
He had a little over five years to go from low-double digits to this lofty goal.
The Airbus executive board initially laughed at him, Leahy recalls 22 years later.