Why did old jet engines smoke?

In general, cooler combustion and turbine temperatures lead to incomplete combustion and the formation of soot. A lot of the older engines from the Soviet era used low-cost materials, allowing only cooler temperatures – hence more soot.

Why do b52 engines smoke so much?

The B-52 still uses older generation engines. All these older generation engines were designed when fuel was cheap. They were far less fuel efficient and the black smoke you see is mostly un-burned fuel.

What engines did the Boeing 707 have?

Though initially fitted with turbojet engines, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D, a turbofan variant of the JT3C with lower fuel consumption and higher thrust. JT3D-engined 707s and 720s were denoted with a “B” suffix.

What industry was most impacted by the development of the Boeing 707?

Many aviation analysts credit the Boeing 707 with ushering in the golden age of commercial air travel.

Why is an afterburner so loud?

Afterburner. The exhaust from a fighter in afterburner is leaving the engine at supersonic speed and creating shock waves. Even in military power (maximum without afterburner) the low bypass ratio engines in fighters have very high velocity exhaust, often supersonic, so very loud.

How much is a Boeing 707 worth?

JOHN TRAVOLTA • Net Worth $200M • Boeing 707 • Private Jet • N707JT • Value $5M • House

What is the oldest passenger plane still in service?

Classic Boeing jets Boeing is another US manufacturer which has produced aircraft that remain in service today after more than half a century in action. Data from ch-aviation.com shows that the oldest is FAP354, a 737-200 that flies for Fuerza Aérea del Perú (the Peruvian Air Force).

How did the Boeing 707 impact society?

The Boeing 707 revolutionised air travel and kicked the jet age into top gear. It was released in January 1958, a month after the epochal, swept-wing jet airliner made its maiden flight. Before the year was out, the sleek 707 was in service with Pan-Am. It was to change the way we fly and see the world.

What was so unique about the jetliner that emerged in 1958?

The jet engine revolutionized air travel. Powerful and durable, jets enabled aircraft manufacturers to build bigger, faster, and more productive airliners. Jet technology also enabled airlines to reduce their operating costs and their airfares.

When did the first Boeing 707 jet come out?

The 707 was developed from the Boeing 367-80, a prototype jet first flown in 1954. A larger fuselage cross-section and other modifications resulted in the initial-production 707-120, powered by Pratt & Whitney JT3C turbojet engines, which first flew on December 20, 1957. Pan American World Airways began regular 707 service on October 26, 1958.

What was the original fuselage width of the Boeing 707?

Model 367-80 origins. Douglas Aircraft had launched its DC-8 with a fuselage width of 147 in (3,730 mm). The airlines liked the extra space and six-abreast seating, so Boeing increased the 707’s width again to compete, this time to 148 in (3,760 mm).

What are the military derivatives of the Boeing 707?

Military derivatives include the E-3 Sentry airborne reconnaissance aircraft and the C-137 Stratoliner VIP transport. A total of 865 Boeing 707s were produced and delivered, not including 154 Boeing 720s. The 707 was based on the 367-80 (the “Dash 80”).

How many 707s were built for the military?

In total, 1,010 707s were built for civilian use, though many of these found their way to military service. The 707 production line remained open for purpose-built military variants until 1991, with the last new-build 707 airframes built as E-3 and E-6 aircraft.