Cessna Citation V
|Citation V / Ultra
|A UC-35A Citation 560 Ultra V of the US Army in Europe at RIAT 2008|
|National origin||United States|
|First flight||August 1987|
|Introduction||1987 (Citation V), 1994 (Ultra), 1998 (Encore)|
|Primary users||United States Army
United States Marine Corps
|Developed from||Cessna Citation II|
|Variants||Cessna Citation Excel|
The Cessna Citation V (Model 560) is a turbofan-powered small-to-medium sized business jet built by the Cessna Aircraft Company in Wichita, Kansas. A stretch of the Cessna Citation II series, the Citation V aircraft was evolved into the Citation Ultra, the Citation Encore, and the Citation Encore+ models.
Design and development 
Citation V 
After stretching the Citation I to make the II, Cessna decided to increase the size of the cabin again, stretching the fuselage by another 20 inches (510 mm), resulting in the largest member of the straight-wing family, the Model 560 Citation V. The first engineering prototype flew in August 1987, and certification was granted in December, 1988. The aircraft utilized the T-47A's JT15D5A engines for extra performance. By the time the aircraft was superseded in 1994, 262 had been built.
Citation Ultra 
In 1993, Cessna decided to update the Citation V design, and announced the Citation Ultra Powered by Pratt & Whittney JT15D-5D engines with 3045 lbs of thrust and the standard avionics suite, which was updated to the Honeywell Primus 1000 EFIS glass cockpit. The Primus 1000 replaced the standard "round dial" flight instruments with three CRT computer screens, one for each pilot and one center mulifunction display. In 1994, the Ultra was named Flying magazine's "Best Business Jet". The Ultra was produced from 1994–1999. Both the Citation V and Ultra hold 5816 pounds of fuel.
Another version of the Model 560 is the OT-47B "Tracker", five of which were purchased by the Department of Defense for use in drug interdiction reconnaissance operations, based at Maxwell Air Force Base. The OT-47B utilizes the F-16's APG-66(V) fire control radar system and the WF-360TL imaging system. The OT-47Bs have been operated on loan to the Colombian Air Force and Peruvian Navy.
Citation Encore/Encore+ 
Five years later, in 1998, the Model 560 was upgraded again as the Citation Encore, with Pratt & Whitney Canada PW535A engines and a decrease in fuel capacity to 5,298 pounds, 518 pounds less than the Ultra's, but it has more range than the Ultra-1,700 nmi with NBAA IFR reserves. The reduction in fuel tank size allowed Cessna to fit the Encore with soft-landing, trailing link, main landing gear, a welcome change for pilots who griped about the notorious kerplunk touchdown characteristics of the stiff-legged earlier Citations aircraft. In addition, the wheel track has been narrowed 3.7 feet for better ground tracking and more mannerly, crosswind landing behavior. The Encore's standard equipment list have been increased and many systems have been upgraded. Bleed air is used to anti-ice the wing leading edge, and several boundary layer energizers, plus a stall fence, have been added to the wing to improve stall characteristics. A digital pressurization controller reduces pilot workload and an improved wheel brake system offers better modulation. Redesigned interior fittings and passenger seats provide more seated headroom. New passenger service units provide more even airflow and temperature control. The Encore's MTOW is bumped 330 pounds to 16,630 pounds, enabling it to carry five passengers with full fuel. The additional weight increases takeoff field length to 3,561 feet, compared with 3,180 feet for the Ultra. The much improved high altitude thrust output of the PW535 engines, however, allow the Encore to climb faster and cruise higher. Its initial cruise altitude is FL 450. The Encore was certified in April 2000 with first delivery in late September 2000. The next upgrade was the Citation Encore+, with the addition of FADEC-controlled PW535B engines and Rockwell-Collins Pro Line 21 avionics suite. The Encore+ was certified by the FAA in December 2006, with deliveries of production aircraft expected in the first quarter of 2007.
- Citation V (Model 560), growth variant of the Citation II/SP JT15D-5A
- Citation Ultra (Model 560) upgraded Citation V with JT15D-5D, EFIS instruments
- Citation Encore (Model 560) upgraded Citation Ultra with PW535A engines and improved trailing-link landing gear
- Citation Encore+ (Model 560) upgraded Encore includes FADEC and a redesigned avionics.
- UC-35A Army and Air Force transport version of the V Ultra.
- UC-35B Army transport version of the Encore
- UC-35C Marine Corps version of the V Ultra.
- UC-35D Marine Corps version of the Encore.
- OT-47B "Tracker" The DoD purchased five OT-47B models for drug interdiction reconnaissance.
Civilian operators 
The aircraft is operated by private individuals, companies, fractionals, charter operators and aircraft management companies.
Military operators 
- Pakistan Air Force — 1× Citation V
Specifications (Cessna Citation Ultra) 
Data from Brassey's World Aircraft & Systems Directory 1999-2000 
- Crew: 2
- Capacity: 7 - 8 passengers
- Length: 48 ft 11 in (14.91 m)
- Wingspan: 52 ft 2 in (15.90 m)
- Height: 15 ft 0 in (4.57 m)
- Wing area: 342.6 ft² (31.83 m²)
- Empty weight: 9,395 lb (4,261 kg)
- Max. takeoff weight: 16,300 lb (7,394 kg)
- Powerplant: 2 × Pratt & Whitney Canada JT15D-5D turbofan, 3,045 lbf (13.55 kN) each
- Never exceed speed: 292 KIAS (Knots Indicated Airspeed) (.755 Mach) 262 KIAS below 8,000 ft
- Cruise speed: 430 knots (495 mph, 796 km/h) at 35,000 ft
- Stall speed: 82 knots (95 mph, 152 km/h) 95 knots, 109 mph, 174 km/h Vmc (Minimum Control Speed)
- Range: 1,960 nm (2,257 mi, 3,650 km) with 45 minutes reserve
- Service ceiling: 45,000 ft (13,715 m)
- Rate of climb: 4,230 ft/min (21.5 m/s)
- Wing loading: lb/ft² (kg/m²)
- Thrust/weight: 0.374
See also 
- Related development
- The Cessna 560 Citation V, Ultra & Encore from Airliners.net
- Flying Magazine: 32. December 1993.
- UC-35A information from GlobalSecurity.org
- Jackson, Paul, Jane's All the World's Aircraft 1996-97, Jane's Information Group, 1996.
- OT-47B information from GlobalSecurity.org
- Picture of the Cessna OT-47B Citation Ultra (560) aircraft Retrieved 21 August 2011.
- "Peru Maps Military Aviation Revival", Flight International, October 21-27, 2003, p.17
- Citation Encore specifications from Cessna
- Citation Encore+ specifications from Cessna
- UC-35B information from GlobalSecurity.org
- "NAVAIR Oversees Final Marine Corps Cessna Citation Encore Delivery" May 24, 2006
- Citation V, Ultra and Encore info from Aviation Safety Network
- Hoyle Flight International 11–17 December 2012, p. 48.
- Hoyle Flight International 11–17 December 2012, p. 63.
- Taylor 1999, p506.
- Hoyle, Craig. "World Air Forces Directory". Flight International, Vol. 182, No. 5370, 11–17 December 2012. pp. 40–64. ISSN 0015-3710.
- Taylor, Michael J.H. (editor) Brassey's World Aircraft & Systems Directory 1999/2000. London: Brassey's, 1999. ISBN 1-85753-245-7.
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