Boeing 307 Stratoliner - Photos & Videos

Боинг 307 Стратолайнер
Страна	Сащ
Роля	Самолет
Първи полет	31 декември 1938 г.
Построен	10

1. Боинг Модел 307 Стратолинер е първият търговски транспортен самолет, който влиза в експлоатация с херметизирана кабина. Тази функция позволява на самолета да се движи на височина от 20 000 фута (6 000 м), доста над много метеорологични смущения. Разликата в налягането е 2,5 psi (17 kPa), така че на 14 700 фута (4 480 м) налягането на въздуха в кабината е еквивалентно на височина от 8 000 фута (2 440 м). Модел 307 има капацитет за екипаж от шест и 33 пътници. В допълнение към цивилната си служба, той е летял и като Boeing C-75 Stratoliner от военновъздушните сили на армията на САЩ, които го използват като товарен самолет за дълги разстояния.

Източник: Boeing 307 Stratoliner в Уикипедия

Boeing Model 307 Stratoliner Walk Around
Фотограф	Владимир Якубов
Локализация	Национален музей на въздуха и космическото пространство
Снимки	107

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Boeing Model 307 Stratoliner Walk Around
Фотограф	Michael Benolkin
Локализация	Не знам
Снимки	27

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A Revolution in Civil Aviation

1. Боинг Модел 307 Стратолинер was a milestone in aviation history. Introduced in 1938, it was the first commercial transport aircraft to feature a pressurized cabin. This allowed the Stratoliner to fly at 20,000 feet, far above the turbulent weather that plagued earlier airliners like the DC-3. By utilizing the wings, tail, and engines of the B-17 Flying Fortress, Boeing created a robust, high-altitude cruiser that changed the definition of luxury and speed in the “Golden Age” of flight.

Attribute	Technical Specification (Boeing 307)
Роля	Long-Range Commercial Airliner / Military Transport
Екипажа	5 (Pilot, Co-pilot, Flight Engineer, 2 Flight Attendants)
First Flight	31 декември 1938 г.
Силова установка	4 × Wright GR-1820-G102 Cyclone radials
Horsepower	1,100 hp (820 kW) per engine
Maximum Speed	241 mph (388 km/h)
Cruising Altitude	20,000 feet (6,100 m)
Passenger Capacity	33 (Day) / 25 (Night Sleeper)

Engineering the High-Altitude Cabin

Circular Fuselage: Unlike the flat-sided aircraft of the era, the 307 featured a perfectly circular cross-section. This shape was necessary to evenly distribute the internal pressure stresses required to maintain a breathable atmosphere at high altitudes.
Pressurization System: The Stratoliner used engine-driven superchargers to pump air into the cabin. This allowed passengers to enjoy an “8,000-foot” environment while the aircraft cruised at 20,000 feet, effectively avoiding the “bumps” of low-level air.
B-17 DNA: To save on development costs and improve reliability, Boeing used the flight surfaces of the B-17C Flying Fortress. The wings, landing gear, and horizontal stabilizers were nearly identical to the bomber, giving the 307 legendary structural strength.
Sleeper Comfort: The wide fuselage allowed for reclining seats and berths, making it one of the first true “sleeper” transports for transcontinental travel.

The “C-75” and Notable History

Military Service (C-75): During WWII, the five Stratoliners operated by TWA were pressed into service for the Army Air Transport Command. Designated as C-75s, they were used for high-priority transatlantic flights because their pressurization allowed them to fly above most interception threats.
Howard Hughes and the “Flying Penthouse”: The famous billionaire bought a Stratoliner and converted it into a lavish private office and home. After being damaged in a hurricane, the fuselage was eventually converted into a “Cosmic Muffin” house boat.
Rare Survival: Only 10 Stratoliners were ever built. The only surviving example, the “Flying Cloud” (formerly of Pan Am), was meticulously restored by Boeing volunteers and is now at the Steven F. Udvar-Hazy Center.