GAF Nomad
The GAF Nomad is an Australian twin-engined utility aircraft developed by Government Aircraft Factories (GAF) in Melbourne during the late 1960s. Conceived to perform short takeoff and landing (STOL) missions, it combines a high-wing configuration with retractable undercarriage and twin turboprop powerplants. The Nomad entered service in 1971 and, through its N22 and stretched N24 variants, served in both civil and military roles across Southeast Asia and Oceania.
Development and Design
Origins and Requirements
In 1965, GAF initiated a project for a compact utility aircraft capable of replacing single-engine types such as the Cessna 180 and Pilatus PC-6 Porter. Early feedback from the Australian Army, influenced by Vietnam War operations, drove the design toward a twin-engine layout to enhance redundancy and hot-and-high performance. Civil operators echoed this preference, leading GAF to abandon a single-engine concept and proceed with the twin-turboprop Nomad design under Project N.
Airframe and STOL Features
The Nomad’s semi-monocoque fuselage is constructed from riveted duralumin panels over an aluminum frame. Its high-mounted wing carries double-slotted flaps and full-span leading-edge slats to achieve steep approach angles and low stall speeds. A twin-boom tailplane provides directional stability at high angles of attack, while the rugged fixed-leaf spring main gear and small oleo-strut nose gear enable operations from unprepared airstrips.
Powerplant and Propulsion
Two Garrett AiResearch TPE331-5-251D turboprops drive three- or four-bladed constant-speed propellers, each rated at 715 shp. Mounted in streamlined nacelles beneath the wing, these engines deliver reliable power for cargo drops, medevac flights, and coastal patrols. Fuel is carried in integral wing tanks, yielding a range well in excess of 1,000 km with reserves for extended missions.
Variants
N22 Series
The N22 was the initial production model, seating up to 15 passengers or equivalent cargo. Subvariants included the N22B with standard cabin fittings and N22C optimized for freight, featuring reinforced flooring and enlarged cargo doors. A specialized N22AEW prototype added a basic airborne early warning radar but suffered from reliability issues and did not enter service.
N24 Series
The N24 stretched the fuselage by 0.6 m to improve passenger comfort and cargo volume. Military versions—designated N24A—fitted tactical avionics and paratroop doors, while ambulance conversions accommodated up to six stretch-type litters. Surveillance and mapping configurations installed cameras, sensors, and extended-range tanks for long-duration flights in remote regions.
Operational History
Civil and Regional Use
Regional carriers in Australia, Papua New Guinea, and New Zealand employed Nomads for scheduled services to remote mining camps, islands, and agricultural properties. Its STOL performance allowed operations from short grass strips, river bars, and cleared mining clearings well into the 1990s. Some remained in commercial use until modern twin-turboprops superseded them in the 2000s.
Military and Special Missions
The Australian Army and Navy used Nomads primarily for light transport and training. Export customers such as the Philippine Air Force and the Indonesian Navy operated Nomads in utility, patrol, and medevac roles. Safety concerns emerged in the 1990s, prompting the withdrawal of most military Nomads amid investigations into structural fatigue and maintenance practices.
Technical Parameters
| Parameter | Specification |
|---|---|
| Type | Twin-engined STOL utility aircraft |
| Manufacturer | Government Aircraft Factories (GAF), Australia |
| First Flight | 23 July 1971 |
| Production Years | 1975–1985 |
| Number Built | 172 |
| Crew | 2 |
| Capacity | 15 passengers or equivalent cargo |
| Powerplant | 2 × Garrett TPE331-5-251D turboprops, 715 shp each |
| Wingspan | 15.24 m (50 ft) |
| Length | 12.19 m (40 ft) |
| Height | 4.34 m (14 ft 3 in) |
| Wing Area | 33.4 m² (360 ft²) |
| Empty Weight | 3,175 kg (7,000 lb) |
| Maximum Takeoff Weight | 5,670 kg (12,500 lb) |
| Maximum Speed | 445 km/h (240 kt) |
| Cruise Speed | 370 km/h (200 kt) |
| Stall Speed | 110 km/h (60 kt) |
| Range | 1,280 km (690 nm) |
| Service Ceiling | 7,620 m (25,000 ft) |
| Takeoff Distance | 360 m (1,180 ft) |
| Landing Distance | 360 m (1,180 ft) |
Legacy and Future Prospects
Although GAF ceased Nomad production in 1985, the type certificate passed to GippsAero in 2008. Plans to revive the design as the GA18 variant offered updated avionics and engines, but full-scale manufacturing did not proceed. Today, surviving Nomads serve with private owners and heritage groups, demonstrating the aircraft’s enduring STOL capabilities and regional versatility across Australian and Pacific skies.
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