Boeing 307 Stratoliner

Boeing 307 Stratoliner
Krajiny	Spojené štáty americké
Úlohu	Lietadlo
Prvý let	31. decembra 1938
Postavený	10

Komisia Boeing Model 307 Stratoliner bolo prvé komerčné dopravné lietadlo, ktoré vstúpilo do prevádzky s pretlakovou kabínou. Táto funkcia umožnila lietadlu plaviť sa v nadmorskej výške 20 000 stôp (6 000 m), čo je vysoko nad mnohými poruchami počasia. Tlakový rozdiel bol 2,5 psi (17 kPa), takže pri 14 700 stopách (4 480 m) bol tlak vzduchu v kabíne ekvivalentný nadmorskej výške 8 000 stôp (2 440 m). Model 307 mal kapacitu pre šesťčlennú posádku a 33 cestujúcich. Okrem civilnej služby bol tiež lietaný ako Boeing C-75 Stratoliner vzdušnými silami armády Spojených štátov, ktoré ho používali ako nákladné lietadlo s dlhým doletom.

Zdrojový: Boeing 307 Stratoliner na Wikipédii

Boeing model 307 Stratoliner chodiť okolo
Fotograf	Vladimír Jakubov
Lokalizácia	Národné letecké a vesmírne múzeum
Fotografie	107

Boeing Model 307 Stratoliner 01

Boeing Model 307 Stratoliner 02

Boeing Model 307 Stratoliner 03

Boeing Model 307 Stratoliner 04

Boeing Model 307 Stratoliner 05

Boeing Model 307 Stratoliner 06

Boeing Model 307 Stratoliner 07

Boeing Model 307 Stratoliner 08

Boeing Model 307 Stratoliner 09

Click on a photo and use the mouse scroll to view all photos

Počkajte, hľadáte Boeing 307 Stratoliner pre vás...

Boeing Model 307 Stratoliner Walk Around
Fotograf	Michael Benolkin
Lokalizácia	Neznáme
Fotografie	27

Pozri tiež:

A Revolution in Civil Aviation

Komisia Boeing Model 307 Stratoliner 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)
Úlohu	Long-Range Commercial Airliner / Military Transport
Posádky	5 (Pilot, Co-pilot, Flight Engineer, 2 Flight Attendants)
First Flight	31. decembra 1938
Pohonná jednotka	4 × Wright GR-1820-G102 Cyclone radials
Horsepower	1,100 hp (820 kW) per engine
Maximálna rýchlosť	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.