Dash 8 may refer to:
The following is a list of locomotives produced by GE Transportation Systems. All were/are built at Fort Worth, Texas or Erie, Pennsylvania, in the United States. Most (except the electrics, the switchers, the AC6000CW, and the Evolution series) are powered by various versions of GE's own FDL diesel prime mover, based on a Cooper Bessemer design and manufactured at Grove City, Pennsylvania.
Because their model designations start with "U", they are known colloquially to railfans as "U-Boats".
Models with "A" suffix are equipped with 12-cylinder prime mover in place of the standard 16-cylinder version, with the same power output.
GE's originally introduced this series with model designation following the pattern of the Dash-7 line. After product improvements were made to the line in 1987 the official designations for models in this series changed to "Dash-8...", as shown in the list below. However, for simplicity, many railroads decided to use designations which follow the pattern of the Dash-7 line. Thus, for example, the Dash 8-40C is usually rendered as "C40-8". The "W" suffix indicates the then-optional wide-nose "North American" safety cab. For example, the Santa Fe used the designation "B40-8W" for GE's "Dash 8-40BW". The railroad continued this practice until its merger with the Burlington Northern Railroad in 1995, and the new railroad, Burlington Northern-Santa Fe (later BNSF Railway) furthered the practice.
The Bombardier Dash 8 or Q-Series, previously known as the de Havilland Canada Dash 8 or DHC-8, is a series of twin-engined, medium range, turboprop airliners. Introduced by de Havilland Canada (DHC) in 1984, they are now produced by Bombardier Aerospace. Over 1,000 Dash 8s of all models have been built, with Bombardier forecasting a total production run of 1,192 aircraft of all variants through to 2016.
The Dash 8 was developed from the de Havilland Canada Dash 7, which featured extreme short take-off and landing (STOL) performance. With the Dash 8, DHC focused on improving cruise performance and lowering operational costs. The engine chosen was the Pratt & Whitney Canada PW100. The aircraft has been delivered in four series. The Series 100 has a maximum capacity of 39, the Series 200 has the same capacity but offers more powerful engines, the Series 300 is a stretched, 50-seat version, and the Series 400 is further stretched to 78 passengers. Models delivered after 1997 have cabin noise suppression and are designated with the prefix "Q". Production of the Series 100 ceased in 2005, and the Q200 and Q300 in 2009.