SM.1019
Role	STOL liaison monoplane Type of aircraft
National origin	United States / Italy
Manufacturer	SIAI-Marchetti
First flight	24 May 1969
Introduction	1976
Primary users	Italian Army Somali Air Force
Number built	86
Developed from	Cessna O-1 Bird Dog

The SIAI-Marchetti SM.1019 is an Italian STOL liaison monoplane built by SIAI-Marchetti for the Italian Army. It is a turboprop-powered derivative of the Cessna O-1 Bird Dog.

Development

To meet an Italian Army requirement for a short take-off liaison aircraft, SIAI-Marchetti modified the design of the Cessna 305A/O-1 Bird Dog with a new turboprop engine and a revised tail unit. The prototype first flew on 24 May 1969 powered by a 317 hp (236 kW) Allison 250-B15C turboprop engine. It was evaluated against the Aermacchi AM.3 and was successful and won a production order for 80 aircraft.

Variants

SM.1019

Prototype with 317hp (236kW) Allison 250-B15C turboprop engine, one built

SM.1019A

Production with 317hp (236kW) Allison 250-B15G 400hp turboprop engine derated to 317hp, 81 built

SM.1019B

Production variant with 400hp (298kW) Allison 250-B17B turboprop engine, designated SM.1019E.I by the Italian Army, four built

Operators

 Italy

• Italian Army

 Somalia

• Somali Air Force – 6 in 1981, all retired.

Accidents and incidents

On 24 July 2021, former US Navy F-14 pilot Dale "Snort" Snodgrass fatally crashed in an SM.1019B with the registration N28U at Lewiston–Nez Perce County Airport in Lewiston, Idaho.^[1][2] The probable cause of the accident was, according to the NTSB report, failure to remove the flight control lock, which immobilized flight control surfaces.^[3]

Specifications (SM.1019A)

Data from Jane's All The World's Aircraft 1976–77^[4]

General characteristics

• Crew: 2
• Length: 8.52 m (27 ft 11 in)
• Wingspan: 10.972 m (36 ft 0 in)
• Height: 2.86 m (9 ft 5 in)
• Wing area: 16.16 m² (173.9 sq ft)
• Aspect ratio: 7.44:1
• Airfoil: NACA 2412
• Empty weight: 690 kg (1,521 lb)
• Gross weight: 1,300 kg (2,866 lb)
• Max takeoff weight: 1,450 kg (3,197 lb)
• Fuel capacity: 320 L (85 US gal; 70 imp gal) in four wing tanks ; Oil capacity 8 L (2.1 US gal; 1.8 imp gal)
• Powerplant: 1 × Allison Model 250-B17B turboprop engine, 298 kW (400 hp)
• Propellers: 3-bladed Hartzell HC-B3TF-7/T10173-11R constant-speed reversible pitch metal propeller

Performance

• Cruise speed: 296 km/h (184 mph, 160 kn) max at sea level
  

300 km/h (190 mph; 160 kn) max cruise speed at 2,500 m (8,200 ft)

281 km/h (175 mph; 152 kn) 75% power cruise speed at 2,500 m (8,200 ft)

• Stall speed: 98 km/h (61 mph, 53 kn) flaps up
  

70 km/h (43 mph; 38 kn) flaps extended

• Never exceed speed: 313 km/h (194 mph, 169 kn)
• Range: 925 km (575 mi, 499 nmi) at sea level

1,090 km (680 mi; 590 nmi)

• Endurance: 5 hours 45 minutes at sea level ; 6 hours 40 minutes at 3,000 m (9,800 ft)
• Service ceiling: 7,620 m (25,000 ft)
• Rate of climb: 9.1833 m/s (1,807.74 ft/min)
• Wing loading: 80.4 kg/m² (16.5 lb/sq ft) at 1,300 kg (2,900 lb) AUW ; 89.7 kg/m² (18.4 lb/sq ft) maximum
• Power/mass: 4.36 kg/kW (7.17 lb/hp) at 1,300 kg (2,900 lb) AUW ; 4.87 kg/kW (8.01 lb/hp)
  
• Take-off run: 112 m (367 ft)
• Landing run: 91.5 m (300 ft)
• Take-off run to 15 m (49 ft): 220 m (720 ft)
• Landing run from 15 m (49 ft): 220 m (720 ft)