The De Havilland Canada DHC-7 Dash 7 is a twin-engine, turboprop-powered regional airliner designed for short takeoff and landing (STOL) operations. First flown in 1975, the Dash 7 was developed to operate in remote, rugged environments where conventional airliners could not access, such as small regional airfields and unprepared landing strips. With its unique four-engine configuration, the DHC-7 combines the short-field capabilities of a small aircraft with the range and capacity of a regional airliner.

The aircraft was designed to serve regional routes, especially in mountainous or difficult-to-access areas. Although it did not achieve the commercial success of other regional aircraft, the Dash 7 became renowned for its exceptional performance in challenging environments. The DHC-7's versatility and reliable performance in short-haul flights with high passenger load capacity earned it a dedicated following among regional carriers in both civilian and military aviation.

Key Specifications (DHC-7 Dash 7)

• Crew: 2 (Pilot and co-pilot).
• Capacity: Typically 50–56 passengers.
• Length: 21.27 m (69 ft 9 in).
• Wingspan: 28.35 m (93 ft 1 in).
• Height: 8.84 m (29 ft 0 in).
• Max Takeoff Weight (MTOW): 16,500 kg (36,376 lb).
• Engines: 4 × Pratt & Whitney Canada PT6A-27 turboprop engines (1,050 hp each).
• Cruise Speed: ~440 km/h (273 mph).
• Range: ~1,100 km (684 miles).
• Ceiling: 7,620 m (25,000 ft).

Notable Features

• Four-Engine Configuration: The DHC-7 Dash 7 is unique in its four-engine setup, which provides excellent lift for short takeoff and landing operations. This configuration allows the aircraft to operate in regions with short, unprepared airstrips that require more lift at lower speeds.
• STOL Performance: The Dash 7 is renowned for its STOL capabilities, allowing it to take off and land in very short distances, making it ideal for accessing remote or difficult-to-reach airports.
• Advanced Aerodynamics: The aircraft features a highly efficient wing design that contributes to its short-field performance, with advanced high-lift devices that enable smooth takeoffs and landings in challenging environments.
• Versatility: With the ability to carry passengers, cargo, and even perform surveillance and reconnaissance missions, the DHC-7 Dash 7 was used for a wide variety of roles, including regional passenger flights, cargo transport, and government operations.

Operators & Usage

• Regional Operators: While its production was limited, the Dash 7 saw use by several regional airlines, especially in Canada, Alaska, and other areas with rough terrain or small airstrips.
• Military Applications: The DHC-7 has also been used by military forces for transport and reconnaissance missions, particularly in areas where its STOL capabilities provide a significant advantage over larger aircraft.
• Government & Special Operations: The Dash 7 has been used in various government and special operations, such as surveillance flights and environmental monitoring, due to its adaptability and rugged performance.