Lancair Sentry

The Lancair Sentry is an American amateur-built aircraft that was designed and produced by Lancair of Redmond, Oregon, introduced in 2002. The aircraft was supplied as a kit for amateur construction, although it was also intended as a production military trainer aircraft. First flown in September 2001, only two were ever completed.[1][2][3][4]

Sentry
Role Amateur-built aircraft
National origin United States
Manufacturer Lancair
First flight September 2001
Status Production completed (2002)
Produced 2002
Number built 2
Unit cost
US$119,900 (kit, 2002)
Developed from Lancair IV

The design was intended to compete with other similar two-seat civil designs, such as the Thunder Mustang and the Turbine Legend. Military sales prospects included the Mexican Navy, but no orders were forthcoming.[3][4]

Design and development

The Sentry is a two-seat development of the four-seat Lancair IV, with the door-accessed cabin replaced by a canopy. It also has an enlarged vertical tail fin.[1][3][4][5]

The aircraft features a cantilever low-wing, a two-seats-in-tandem enclosed cockpit under a rear-hinged bubble canopy, retractable tricycle landing gear and a single engine in tractor configuration.[1]

The aircraft is made from composite materials, predominantly carbon fiber reinforced polymer. Its 30.2 ft (9.2 m) span wing employs a McWilliams RXM5-217 root airfoil, tapering to a NACA 64-212 tip airfoil. The wing has an area of 98 sq ft (9.1 m2) and mounts flaps. The standard engine used is the 708 hp (528 kW) Walter M601D turboprop powerplant powering an American 82 in (208.3 cm) three-bladed Hartzell Propeller or a Czech 84 in (213.4 cm) Avia Propeller.[1][2][4][6]

Specifications (Sentry)

Data from Pilot Friend, Skybrary[4][5]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Length: 26 ft (7.9 m)
  • Wingspan: 30.2 ft (9.2 m)
  • Height: 7 ft 10 in (2.40 m)
  • Wing area: 98 sq ft (9.1 m2)
  • Empty weight: 2,200 lb (998 kg)
  • Gross weight: 3,550 lb (1,610 kg)
  • Fuel capacity: 125 U.S. gallons (470 L; 104 imp gal)
  • Powerplant: 1 × Walter M601D turboprop aircraft engine, 708 hp (528 kW)
  • Propellers: 3-bladed Hartzell Propeller constant speed propeller

Performance

  • Cruise speed: 380 mph (610 km/h, 330 kn)
  • Stall speed: 74 mph (119 km/h, 64 kn) power off
  • Range: 1,150 mi (1,850 km, 1,000 nmi)
  • Rate of climb: 4,000 ft/min (20 m/s)
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References
  1. "Lancair Flies New 'Sentry' Turbo-Prop - Aero-News Network". www.aero-news.net. Retrieved 10 April 2019.
  2. "Home". Whiplash Aero. Retrieved 10 April 2019.
  3. "Lancair aims Sentry racer at military market". Flightglobal.com. 1 October 2002. Retrieved 10 April 2019.
  4. "Lancair Sentry". www.pilotfriend.com. Retrieved 10 April 2019.
  5. "LANCAIR Sentry 4T - SKYbrary Aviation Safety". www.skybrary.aero. Retrieved 10 April 2019.
  6. Lednicer, David (2010). "The Incomplete Guide to Airfoil Usage". Retrieved 9 April 2019.
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