Description

The Preceptor N3 Pup-FAR Part 103 ultralight is a family of ultralight, tube-and-fabric, high-wing, homebuilt aircraft.
Designed to meet FAR Part 103 ultralight Vehicles standards, the N3 Pup can accept various lightweight four stroke engines of between 37 and 60 hp (28 and 45 kW). If built to specifications with minimal additions, it can meet the requirements for a FAR 103 ultralight aircraft, with an empty weight of 254 lb (115 kg). It may also be built as an amateur-built aircraft or US light-sport aircraft at higher weights.

Design and development:
The Pup is designed to be flown cross-country and also can be mounted with floats and skis.
The N3 Pup uses tube-and-fabric construction and a conventional 4-cycle engine. The fuselage and tail are welded from 4130 steel tube. There are two main wing configurations that can be built. An aluminum wing spar with hinges allows the wings to be folded for trailering or storage. A wooden wing spar configuration gives the plane a lighter weight, but leaves the wings fixed. The engine cowling is made from fiberglass.
The aircraft has had many engine choices available, but was marketed to use the Half VW engine first developed by Global engines, later bought by Mosler engines and finally marketed by TEC engines. The Total Engine Concepts MM CB-40 was the last purpose-built engine marketed for the Pup.
The design was also adapted as an autogyro, the Little Wing Roto-Pup.

Variants:

N3 Pup-FAR Part 103 ultralight
Single seat variant designed to resemble a 3/4 scale Piper J-3 Cub. Originally named the Nostalgair N-3 Pup. Engine is a TEC Half VW of 40 hp (30 kW). Meets FAR 103 requirements with an empty weight of 254 lb (115 kg) and gross weight of 535 lb (243 kg). 830 had been completed by December 2011.

Super Pup
Single seat variant with larger engine and higher empty weight, first flown in 1995. Engine is a Volkswagen air-cooled engine of 50 hp (37 kW). Empty weight of 330 lb (150 kg) and gross weight of 630 lb (286 kg). 55 had been completed and flown by December 2011.

Ultra Pup (N3-2) Tandem
Two seat 3/4 scale Piper J-3 Cub, first flown in 1988 with a 35 hp (26 kW) MM-CB engine. Production engine is a Volkswagen air-cooled engine of 60 hp (45 kW). Empty weight of 450 lb (204 kg) and gross weight of 1,100 lb (499 kg). Folding wings for storage or ground transport. 200 had been completed and flown by December 2011.

Specifications N3 Pup-FAR Part 103 ultralight:

Length: 16 ft 6 in (5.03 m)
Wingspan: 30 ft 6 in (9.30 m)
Height: 5 ft 0 in (1.52 m)
Wing area: 120 sq ft (11 m2)
Empty weight: 254 lb (115 kg)
Gross weight: 535 lb (243 kg)
Fuel capacity: 5 US Gallons (19 litres)
Powerplant: 1 × Hummel Half VW 1037 cc four-stroke, two-cylinder horizontally opposed aircraft engine, 37 hp (28 kW)
Propellers: 2-bladed wooden, 4 ft 6 in (1.37 m) diameter
Maximum speed: 63 mph (101 km/h; 55 kn)
Cruise speed: 60 mph (97 km/h; 52 kn)
Stall speed: 27 mph (43 km/h; 23 kn)
Range: 173 mi; 278 km (150 nmi)
Service ceiling: 10,000 ft (3,000 m)
g limits: +10.0/-3.0 ultimate
Rate of climb: 600 ft/min (3.0 m/s)
Wing loading: 3.76 lb/sq ft (18.4 kg/m2)