FN 333 "RIVIERA"

Italian amphibious vehicle

Even the Italian aviation industry does not want to be left behind the USA, as the largest manufacturer of sports and tourist aircraft. In February 1962, the Siai Marchetti company put on the market a four-seater amphibian in an unusual arrangement with a push engine and two tail beams. It is a successful design, as evidenced by certification in the USA and deliveries to the American market. The prototype of the Riviera was already created in 1954 by the Nardi company, as a 145 hp Continental engine. "Riviera" currently holds many international records in its class, not only for amphibians - e.g. height 7189 m, speed 270, 27 km/h based on 100 km, but also for flying boats - height 6950 m, speed 271.78 km/h based on 100 km and many others.

FN 333 RIVIERA plans

TECHNICAL DESCRIPTION
The FN 333 "Riviera" is an all-metal four-seat high-plane pusher amphibious vehicle with two tail spars.
The wing has an aerodynamic flap approximately one third of the way from the edge arch. The design is two-spar, while the landing flaps are divided and hinge only from the lower contour of the wing. Structurally, the wing is divided from the center-plane to behind the beams of the tail surfaces. The NACA 23000 series airfoil is used.
The hull has an unusual shape: it ends at the engine at the top, and the lower boat part is extended to under the tail. The spacious four-seater cabin has entrance doors on both sides. The front split seats are sliding. Dual steering is steering wheel, engine control is in the middle on the panel under the dashboard. The dashboard is clearly arranged and can be equipped with all instruments for non-visual flight (under IFR).
The beams of the tail surfaces consist of two duralumin tubes.

Tail surfaces. Direction indicators with a significant keel area are directly on the beams. A rectangular elevator is then inserted between the beams. Rudders are balanced statically and dynamically and have a symmetrical slim profile.

The landing gear on the ground consists of a three-wheel landing gear retractable into the fuselage, which has hydraulic shock absorbers. The 6.5 x 8 main wheels have hydraulic brakes. The covers seal the retracted chassis hermetically against the ingress of water. For landing on water, the lower boat-shaped part of the fuselage and auxiliary floats are used, which hydraulically fold from the edges of the wing, where they form aerodynamically advantageous spindles in the retracted state. To facilitate maneuvering in the water, there is a folding rudder in the stern of the boat hull, connected in the extended state to the steering. The floats and the lower boat part of the hull are made of peraluminium (light anti-corrosion alloy).

Engine group. A 6-cylinder American Continental IO - 470-P push engine with a maximum of 250 hp at 2600 rpm drives the Hartzell constant speed metal reverse drill. The propeller can be supplied with either two or three blades, depending on the request. Two fuel tanks with a total capacity of 160 1 are in the wing.
The coloring is quite detailed, while minor modifications are made to the steering wheel (see US version). The basic white paint is decorated with red and black, while the two stripes on the bow of the hull, the symbolic arrow behind the inscription and the stripe on the boat part of the hull, the lower part of the emblem and the four stripes on the rudder are black. In addition, there are black registration marks on the keels from the outside, on the right wing above and on the left below.

Technical data, performance: span 10.40, length 7.39, height 3.22 m; wing area 15 m2; surface load 98 kg/m2, empty weight 1030 kg, take-off weight 1485 kg. Speeds: highest horizontal 285, cruising at 70% engine power at 2438 m is 264, maximum 330, minimum with flaps at 45° is 110 km/h. Rate of climb on the ground 372 m/min, reach 5640 m. Start from the ground at 290 m, reach on the ground with brakes 200 m. Range 1390 km at 60% engine performance.