| Dash 8 / Q-Series | |
|---|---|
| A Q400 operated by Flybe of the UK | |
| Role | Turboprop airliner |
| Manufacturer | de Havilland Canada - Toronto Bombardier Aerospace - Downsview |
| First flight | June 20, 1983 |
| Introduction | 1984 with NorOntair |
| Primary users | Air Canada Jazz Flybe Horizon Air Piedmont Airlines |
| Produced | 1983–present |
| Number built | 1054 (as of October 31, 2011)[1] |
| Unit cost | Q200 US$13 million Q300 US$17 million Q400 US$27 million[2] |
| Developed from | de Havilland Canada Dash 7 |
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,[3] with Bombardier forecasting a total production run of 1,192 aircraft of all variants through to 2016.[4]
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".[5] Production of the Series 100 ceased in 2005, and the Q200 and Q300 in 2009. Bombardier is considering launching a stretched version of the Q400.
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In the 1970s, de Havilland Canada had invested heavily in its Dash 7 project, concentrating on STOL and short-field performance, the company's traditional area of expertise. Using four medium-power engines with large four-bladed propellers resulted in very low noise levels which, combined with its excellent STOL characteristics, made the Dash 7 suitable for operating from small in-city airports, a market DHC felt would be compelling. However, only a handful of air carriers employed the Dash 7, as most regional airlines were more interested in operational costs than short-field performance.
In 1980, de Havilland responded by dropping the short-field performance requirement and adapting the basic Dash 7 layout to use only two, more powerful engines. Its favoured engine supplier, Pratt & Whitney Canada, developed the new PW100 series engines for the role, more than doubling the power from its PT6. Originally designated the PT7A-2R engine, it later became the PW120. When the Dash 8 rolled out on April 19, 1983, more than 3,800 hours of testing had been accumulated over two years on five PW100 series test engines. Certification of the PW120 followed in late 1983.[6]
Distinguishing features of the Dash 8 design are the large T-tail intended to keep the tail free of prop wash during takeoff, a very high aspect ratio wing, the elongated engine nacelles also holding the rearward-folding landing gear, and the pointed nose profile. First flight was on June 20, 1983, and the airliner entered service in 1984 with NorOntair. In 1984, Piedmont Airlines, formerly Henson Airlines, was the first US customer for the Dash 8.
The Dash 8 design has better cruise performance than the Dash 7, is less expensive to operate and much less expensive to maintain, due largely to having only two engines. The Dash 8 has the lowest cost per passenger mile of any regional airliner of the era. It was a little noisier than the Dash 7 and could not match the STOL performance of its earlier DHC forebears, although it was still able to operate from small airports with 3,000 ft (910 m) runways, compared to the 2,200 ft (670 m) required by a fully loaded Dash 7.
In April 2008, Bombardier announced that production of the Classic versions (Series 100, 200, 300) would be ended, leaving the Series 400 as the only Dash 8 still in production. 671 Dash 8 Classics were produced, the last one delivered to Air Nelson in May 2008.[7]
Bombardier proposed development of a 90-seat stretch of the Q400 with two plug-in segments, called the Q400X project, in 2007.[8] In response to this project, as of November 2007[update], ATR was studying a 90-seat stretch.[9]
In June 2009, Bombardier commercial aircraft president Gary Scott indicated that the Q400X will be "definitely part of our future" for possible introduction in 2013-14, although he has not detailed the size of the proposed version or committed to an introduction date.[10]
As of July 2010, Bombardier's vice president, Phillipe Poutissou made comments explaining the company was still studying the prospects of designing the Q400X and talking with potential customers. At the time, Bombardier was not as committed to the Q400X as it had been previously.[11]
The Dash 8 was introduced at a particularly advantageous time; most airlines were in the process of adding new aircraft to their fleets as the airline industry expanded greatly in the 1980s. The older generation of regional airliners from the 1950s and 1960s were nearing retirement, leading to high sales figures. De Havilland Canada was unable to meet the demand with sufficient production.
In 1988, Boeing bought the company in a bid to improve production at DHC's Downsview Airport plants, as well as better position itself to compete for a new Air Canada order for large intercontinental airliners. Air Canada was a Crown corporation at the time, and both Boeing and Airbus were competing heavily via political channels for the contract. It was eventually won by Airbus, which received an order for 34 A320 aircraft in a highly controversial move. The allegations of bribery are today known as the Airbus affair. Following its failure in the competition, Boeing immediately put de Havilland Canada up for sale. The company was eventually purchased by Bombardier in 1992.
The market demand for short-haul airliners was so great that Aérospatiale of France paired with Italy's Alenia to form ATR. Their once separate efforts combined to compete directly with the Dash 8. The resulting ATR 42 was even more economical than the Dash 8, but de Havilland Canada responded with newer models to close the gap. Other companies competed with smaller or more tailored designs, like the Saab 340 and Embraer Brasilia, but by the time these were introduced the market was already reaching saturation.
All Dash 8s delivered from the second quarter of 1996 (including all Series 400s) include the Active Noise and Vibration Suppression (ANVS) system designed to reduce cabin noise and vibration levels to nearly those of jet airliners. To emphasize their quietness, Bombardier renamed the Dash 8 models as the Q-Series turboprops (Q200, Q300 and Q400).[5]
The Dash 8-100 is no longer in production, with the last Dash 8-102 built in 2005. Production of the Q200 and Q300 ceased in May 2009.[12]
The introduction of the regional jet altered the sales picture. Although more expensive than turboprops, regional jets allow airlines to operate passenger services on routes not suitable for turboprops. Turboprop aircraft have lower fuel consumption and can operate from shorter runways than regional jets, but have higher engine maintenance costs, shorter ranges and lower cruising speeds.[13]
The market for new aircraft to replace existing turboprops once again grew in the mid-1990s, and DHC responded with the improved "Series 400" design.
When world oil prices drove up short-haul airfares in 2006, an increasing number of airlines that had bought regional jets began to reassess turboprop regional airliners, which use about 30-60% less fuel than regional jets. Although the market does not appear to be as robust as in the 1980s when the first Dash 8s were introduced, 2007 saw increased sales of the only two 40+ seat regional turboprops still in western production, Bombardier's Q400 and its competitor, the ATR series of 50-70 seat turboprops. The Q400 has a cruising speed close to that of most regional jets, and its mature engines and systems require less frequent maintenance, reducing its disadvantage.[14]
According to Bombardier marketing, the aircraft breaks even with about 1/3 of its seats filled (or 1/4 with more closely spaced seats), making it particularly attractive on routes with varying passenger numbers where many seats would be empty on some flights. For example, Island Air in Hawaii calculated that the use of a 50-seat Regional Jet would break even at 45 passenger seats compared to the Q400's 35-36 seats (around 55% breakeven load factor). Most short-haul routes are less than 350 miles (500 km), so the time spent on taxiing, takeoff and landing virtually eliminates a competing jet's speed advantage. As the Q400's 360 knot (414 mph, 667 km/h) cruise speed approaches jet speeds, short-haul airlines can usually replace a regional jet with a Q400 without changing their gate-to-gate schedules.[15]
Bombardier has singled out the Q400 for more aggressive marketing, launching a website centered around the aircraft.[16] The aircraft is also being considered for a further stretched version (currently designated Q400X) to compete in the 90-seat market range.[17] Bombardier commercial aircraft president Gary Scott has affirmed that 2013-2014 is "the sort of time period we're looking at today" for offering a stretched version of the Q400 turboprop.[18]
In September 2007, two separate incidents of similar landing gear failures occurred within four days of each other on SAS Dash 8-Q400 aircraft. A third incident occurred in October 2007, leading to the withdrawal of the type from the airline's fleet.
On September 9, 2007 the crew of Scandinavian Airlines (SAS) Flight 1209, en route from Copenhagen to Aalborg, reported problems with the locking mechanism of the right side landing gear, and Aalborg Airport was prepared for an emergency landing. Shortly after touchdown the right main gear collapsed and the airliner skidded off the runway while fragments of the right propeller shot against the cabin and the right engine caught fire. Of 69 passengers and four crew on board, 11 were sent to hospital, five with only minor injuries.[32][33][34] The accident was filmed by a local news channel (TV2-Nord) and broadcast live on national television.
Three days later on September 12, Scandinavian Airlines Flight 2748 from Copenhagen to Palanga had a similar problem with the landing gear, forcing the aircraft to land in Vilnius. No passengers or crew were injured.[35] Immediately after this incident SAS grounded all 33 Q400 airliners in its fleet and, a few hours later, Bombardier recommended that all Q400s with more than 10,000 flights be grounded until further notice.[36] This affected about 60 aircraft, out of 140 Q400s then in service.
On October 27, 2007, Scandinavian Airlines Flight 2867 en route from Bergen to Copenhagen had severe problems with the landing gear during landing in Kastrup Airport. The right wing gear did not deploy properly (or partially), and the aircraft skidded off the runway in a controlled emergency landing. The Q400 was carrying 38 passengers, two infants and four crew members on board. No injuries were reported.[37][38] The next day, SAS permanently removed its entire Dash 8 Q400 fleet from service.[39] In a press release on October 28, 2007, the company's president said: "Confidence in the Q400 has diminished considerably and our customers are becoming increasingly doubtful about flying in this type of aircraft. Accordingly, with the Board of Directors' approval, I have decided to immediately remove Dash 8 Q400 aircraft from service."[37][39][40] The preliminary Danish investigation determined the latest Q400 incident was unrelated to the airline's earlier corrosion problems, in this particular case caused by a misplaced O-ring found blocking the orifice in the restrictor valve.[41]
In all, eight Q400s had landing gear failures while landing during 2007: four in Denmark, one in Germany, one in Japan, one in Lithuania and one in South Korea. In November 2007, it was revealed that the Swedish Civil Aviation Administration had begun an investigation and as a result found Scandinavian Airlines System culpable of corner-cutting in its maintenance department. The airline reportedly made 2,300 flights in which safety equipment was not up to standard.[42] On March 10, 2008, SAS ordered 27 more aircraft from Bombardier in a compensation deal; 14 Q400 NextGen turboprops and 13 CRJ900 jets.[43]
| Series 100[2] | Series 200[44] | Series 300[45] | Series 400[46] | |
|---|---|---|---|---|
| Unit cost (US$) | $12.5 million | $13 million | $17 million | $27 million |
| Entered service | 1984 | 1995 | 1989 | 2000 |
| Aircraft dimensions | ||||
| Overall length | 73 ft (22.25 m) | 84 ft 3 in (25.68 m) | 107 ft 8 in (32.81 m) | |
| Height (to top of horizontal tail) | 24 ft 7 in (7.49 m) | 27 ft 3 in (8.3 m) | ||
| Fuselage diameter | 8 ft 10 in (2.69 m) | |||
| Maximum cabin width | 8 ft 3 in (2.51 m) | |||
| Cabin length | 29 ft 10 in (9.1 m) | 41 ft 4 in (12.6 m) | 61 ft 8 in (18.8 m) | |
| Wingspan (geometric) | 84 ft 11 in (25.89 m) | 90 ft (27.43 m) | 93 ft 2 in (28.4 m) | |
| Wing area (reference) | 585.55 ft² (54.4 m²) | 604.93 ft² (56.2 m²) | 679.20 ft² (63.1 m²) | |
| Basic operating data | ||||
| Engines | 2 PW120A/PW121 | 2 PW123C/D | 2 PW123B | 2 PW150A |
| Typical passenger seating | 37 (Single Class) | 50 (Single Class) | 78 (Single Class) | |
| Passenger seating range | 37-39 | 50-56 | 68-80 | |
| Typical cruise speed | 310 mph (500 km/h) 269 knots | 334 mph (537 km/h) 290 knots | 328 mph (528 km/h) 285 knots | 414 mph (667 km/h) 360 knots |
| Maximum operating altitude | 25,000 ft (7,620 m) | 27,000 ft (8,230 m) | ||
| Range (w/typical pax) | 1,174 miles (1,889 km) | 1,065 miles (1,713 km) | 968 miles (1,558 km) | 1,567 miles (2,522 km) |
| Range (w/LR tanks) | n/a | 1,264 miles (2,034 km) | n/a | |
| Takeoff run at MTOW | 2,625 ft (800 m) | 3,865 ft (1,178 m) | 4,600 ft (1,402 m) | |
| Design weights | ||||
| Maximum takeoff weight | 36,300 lb (16,470 kg) | 43,000 lb (19,500 kg) | 64,500 lb (29,260 kg) | |
| Maximum landing weight | 34,500 lb (15,650 kg) | 42,000 lb (19,050 kg) | 61,750 lb (28,010 kg) | |
| Maximum zero fuel weight | 32,400 lb (14,700 kg) | 39,500 lb (17,920 kg) | 57,000 lb (25,850 kg) | |
| Maximum fuel capacity | 835 imp gal (3,160L) | 1,724 imp gal (6,526L) (11830 pounds) | ||
| Typical operating weight empty | 23,111 lb (10,483 kg) | 25,995 lb (11,791 kg) | 37,886 lb (17,185 kg) | |
| Typical volumetric payload | 7,511 lb (3,407 kg) | 11,327 lb (5,138 kg) | 19,114 lb (8,670 kg) | |
| Model Series | Orders | Deliveries | Unfilled |
|---|---|---|---|
| Series 100 | 299 | 299 | - |
| Series 200 | 105 | 105 | - |
| Series 300 | 267 | 267 | - |
| Series 400 | 412 | 383 | 29 |
| Grand Total | 1083 | 1054 | 29 |
All data as of October 31, 2011.[1]
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