Engine Power Behind Lockheed Model 12-A and Speed Capabilities

2 min read 18-11-2024

Engine Power Behind Lockheed Model 12-A and Speed Capabilities

The Lockheed Model 12 Electra Junior, often simply called the Lockheed Model 12, was a significant aircraft in its time, known for its reliability and performance. Understanding its capabilities requires examining the engine power that drove its impressive speed and range.

Powering the Electra Junior: The Pratt & Whitney Wasp Jr.

The Lockheed Model 12-A, a variant of the Model 12, was typically equipped with two Pratt & Whitney Wasp Junior engines. These air-cooled radial engines were a hallmark of many aircraft in the late 1930s and early 1940s. Their relatively compact size and robust design contributed significantly to the Model 12's success.

Engine Specifications:

Type: Nine-cylinder radial engine
Power Output: Each engine produced approximately 450 horsepower. This translates to a total of 900 horsepower for the aircraft.
Reliability: The Wasp Jr. was known for its reliability, crucial for both commercial and private aviation at the time. This minimized maintenance downtime and increased operational efficiency.

Speed and Performance: A Notable Performer

The combined power of the two Wasp Jr. engines gave the Lockheed Model 12-A respectable speed and performance capabilities for its era.

Cruising Speed:

The aircraft boasted a cruising speed of around 180 mph (290 km/h). This was a considerable speed for a twin-engine aircraft of its size and type, allowing for quicker travel times.

Maximum Speed:

While the cruising speed was important for efficient operation, the Model 12-A could achieve a maximum speed of around 200 mph (320 km/h). This was achievable under optimal conditions and represented the upper limits of the aircraft's performance envelope.

Range:

The combination of engine power and aerodynamic design provided a substantial range, enabling longer flights. The Model 12-A could fly for approximately 700 miles (1100 km) on a single tank of fuel. This figure varied based on factors such as payload, weather conditions, and altitude.

Conclusion: A Powerful and Efficient Design

The Lockheed Model 12-A's performance characteristics were directly linked to the powerful and reliable Pratt & Whitney Wasp Jr. engines. The aircraft's speed and range, combined with the engine's reliability, made it a popular and versatile choice for various applications including commercial transport, private ownership, and even military roles. The Model 12-A stands as a testament to effective engineering and design in the golden age of aviation.