Lockheed Model 14 Super Electra

Was more commonly known as the Lockheed 14 and it was a civil passenger and cargo aircraft.
Developed by the original model of Electra10 increasing the passenger seating from 10 to 14.
The first Model14 flew on 1937 and entered in commercial service with Northwest Airlines.

General characteristics
Crew: two, pilot and co-pilot

Capacity: 12 passengers
Length: 44 ft 4 in (13.52 m)
Wingspan: 65 ft 6 in (19.97 m)
Height: 11 ft 5 in (3.48 m)
Wing area: 551 ft² (51.2 m²)Empty weight: 10,750 lb (4,886 kg)
Loaded weight: 15,650 lb (7,114 kg)
Max takeoff weight: 17,500 lb (7,955 kg)
Powerplant: 2 × Wright SGR-1820-F62 radial engines, 760 hp (567 kW) each

Performance
Maximum speed: 250 mph (402 km/h)
Range: 2,125 mi (3,420 km)
Service ceiling: 24,500 ft (7,649 m)
Wing loading: 28 lb/ft² (139 kg/m²)
Power/mass: 0.10 hp/lb (0.16 kW/kg)

MODEL 10 ELECTRA

In 1932, after acquiring Lockheed Aircraft Corporation, Robert Gross began plans for a new passenger transport. Fitted with two Pratt & Whitney Wasp Jr. SB engines, the aircraft would have space for a crew of two, along with ten passengers. In keeping with Lockheed’s naming convention, the aircraft was designated Model 10 and named Electra.The model 10 Electra was an all-metal monoplane airliner developed in the 1930s to compete with the Boeing 247 and Douglas DC-2
The name was taken from one of the stars in the cluster Pleiades that make up the constellation Taurus.The aircraft gained considerable fame as it was flown by Amelia Earhart on her ill-fated around-the-world expedition in 1937.
148 Electras were built between August 4, 1934 and July 18, 1941. This includes four commercial and five military versions. The commercial versions were primarily operated by airlines in the latter half of the 1930s. The last commercial operator of the Model 10 Electra was Provincetown-Boston Airlines in the early 1970s.

Model 10-A Electra Specifications

Span: 55’ (16.76 m)

Length: 38’ 7” (11.76 m)

Height: 10’ 1” (3.07 m)

Empty Weight: 6,454 lb (2,927 kg)

Max Speed: 202 mph

Cruising Speed: 190 mph

Rate of Climb: 1,140 ft/min

Service Ceiling: 19,400 ft

Range: 810 miles

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DC2-VINTAGE AIRCRAFTS

Inspired by the technical success of the DC-1, the DC-2 was introduced less than a year after the DC-1's first flight.

The new plane was similar in shape to the DC-1 but had more powerful engines, was faster and capable of longer flights. More importantly, it was two feet longer and could carry two more passengers.

The DC-2 was an instant hit. In its first six months of service, the DC-2 established 19 American speed and distance records. In 1934, TWA put DC-2s on overnight flights from New York to Los Angeles

 The design impressed a number of American and European airlines and further orders followed. Those for European customers KLM, LOT, SWISSAIR, CLS and LAPE were assembled by Fokker in the Netherlands after that company bought a license  from Douglas

In October 1934, KLM Royal Dutch Airlines entered one of its DC-2s in the London-to-Melbourne, Australia, air race. It made every scheduled passenger stop on KLM's regular 9,000-mile route (1,000 miles longer than the official race route), carried mail and even turned back once to pick up a stranded passenger. 

In 1935, the DC-2 became the first Douglas aircraft to receive the prestigious Collier Trophy for outstanding achievements in flight. Between 1934 and 1937, Douglas built 156 DC-2s.

Specifications
First flight:	May 11, 1934
Wingspan:	62 feet
Length:	61 feet 11.75 inches
Height:	16 feet 3.75 inches
Ceiling:	22,450 feet
Range:	1,000 miles
Weight:	18,560 pounds
Power plant:	Two 875-horsepower Wright Cyclone engines
Speed:	200 mph
Accommodation:	3 crew, 14 passengers, 3,600 pounds cargo

fsworld: DC-1:Vintage aircrafts

fsworld: DC-1:Vintage aircrafts

DC-1:Vintage aircrafts

The Douglas DC-1 was the first model of the famous DC (Douglas Commercial) commercial transport aircraft series. Although only one example of the DC-1 was produced, the design was the basis for the DC-2 and DC-3.

Development of the DC-1 can be traced back to the 1931 crash of TWA flight 599, which had suffered a structural failure of one of its wings, probably due to water which had over time seeped between the layers of the wood laminate and dissolved the glue holding the layers together

It was designed as a series prototype for TWA to compete against the revolutionary Boeing Model 247 ordered by Boeing subsidiary United Air Lines. 

The DC-1 was very advanced for its day. Its fuselage was streamlined, as were its wings and engine cowlings. It featured all-metal construction and retractable landing gear. Variable-pitch propellers gave the plane remarkable takeoff and landing characteristics. With plush seats, a kitchen and a comfortable restroom, the DC-1 set a new standard for passenger comfort.

Great efforts were made to insulate the passenger compartment from the noise of the plane's engines. The plane's passenger seats were mounted on rubber supports, while the cabin was lined with noise absorbing fabric. Carpet covered the cabin floor and even the engines were mounted on rubber insulators.

Specifications
First flight:	July 1, 1933
Wingspan:	56 feet
Length:	60 feet
Height:	16 feet
Ceiling:	23,000 feet
Range:	1,000 miles
Weight:	17,500 Pounds
Power plant:	Two 710-horsepower Wright engines
Speed:	190 mph
Accommodation:	2 crew, 12 passengers

BOEING 247:VINTAGE AIRCRAFTS

The revolutionary Boeing Model 247, developed in 1933, was an all-metal, twin-engine airplane and the first modern passenger airliner.  Considered the first such aircraft to fully incorporate advances such as all-metal, semi-monocoque construction, a fully cantilevered  wing and retractable landing gear. Other advanced features included a gyro panel for instrument flying, an autopilot, pneumatically operated de-icing equipment, a variable-pitch propeller and retractable landing gear.

the 247 was capable of crossing the United States from east to west eight hours faster than their predecessors, such as the Ford Trimotor and Curtis Condor. Entering service on May 22, 1933, a Boeing Air Transport 247D set a cross-country record pace of 19½ hours with seven stops on its San Francisco and New York inaugural flight. Flying with 189 mph its trip  was seven and a half hours shorter than that made by any previous airliners.

The Boeing 247 introduces reliability, safety and comfort in air travel and together with DC-2  aviation entered the age of speed. The Boeing design had been the first to enter series production, the 247 proved to have some serious design deficiencies. Air carriers considered its limited capacity a drawback since it only carried 10 passengers, in five rows with a seat on each side of the aisle, as well as a flight attendant.

The 247s remained in airline service until World War II

Specifications

First flight:	Feb. 8, 1933
Model number:	247
Classification:	Commercial transport
Span:	74 feet
Length:	51 feet 7 inches
Gross weight:	13,650 pounds
Top speed:	200 mph
Cruising speed:	189 mph
Range:	745 miles
Ceiling:	25,400 feet
Power:	Two 500-horsepower P&W Wasp engines
Accommodation:	3 crew, 10 passengers, 400 pounds of mail