The plane "Aray"

The plane "Arai" - four-seater, which is more advanced modification of the popular in Canada and the US whale aircraft CH801. Year: 2014. Country of origin: Kazakhstan.

For safe operation of the airplane and the long-term work on aviahimicheskih aircraft manufacturers, the company Zenair, improving the strength of the prototype performed to the maximum overload, which increased take-off weight (maximum) to 1136 kilogram payload up to 590 kilos.

Opposed piston engine aircraft Injection Textron Lycoming IO-375 B2B, having a capacity of 185 hp, working on automobile gasoline A-96 or A-95.

The plane of maximum versatility and durability is ideal for use on open spaces of Kazakhstan on aerial robots and work aviahimicheskih control of power lines and oil pipelines on fire prevention patrol forests, on the monitoring of air state of fisheries resources and wildlife, air ambulance, and for other tasks.

The plane "Arai" was designed to operate outside of airfields for landings and takeoffs from short sections (seventy meters) of arable land, a dirt road, mountain plateaus, meadows, dry riverbed, shallow or sandy shores and other unsuitable for ordinary aircraft platforms.

The plane "Aray" is a four-seater cabin, which together with the pilot located three passengers with luggage to 80 kg (accounting clerk works and agronomists, repairers, pilots observers, tourists doctor and the stretcher with the patient, fishermen or hunters). The aircraft features dual control and is often used for pilot training.

"Aray" in the agricultural variant is equipped with spray equipment, chemicals tank (360 L) and slotted jets.

Cost-effective, high performance and safety of the aircraft, "Arai" in agroaviatsii ensure its flawless flight and technical characteristics, namely:

• the opportunity to work "with the edge of the field," without losing time, departures / podlety from the airport to the field, which was obtained thanks to the ability of the machine to a short takeoff and landing safety on rough surfaces;
• high maneuverability at low speed to reduce the time lost on many reversals during processing fields, obtained thanks to the special design of the wing, lasting airframe and volume control surfaces area;
• High safety close to the ground, reducing the fatigue of the pilot, which was obtained thanks to the low take-off and landing speed, amazing handling at low speed, excellent cockpit visibility, powerful chassis, equipped with a nose strut, providing a safe landing and take-off on a rough surface with a strong side nosing wind and danger;
• low cost of operation and ease of maintenance, the need to ensure a minimum aircraft "Aray" maintenance, the use of gasoline A-96 / A-95, and maintainability in the field.

During the design of the aircraft, "Arai" has created a unique wing design that provides multiple specific characteristics necessary for agrosamoleta:

1. Excellent handling of the machine at low speed, necessary when working at low altitude over the fields with different obstacles (masts, poles, trees).
2. The high rate of lift is maintained even at high angles of attack, the required short-take-off with small areas on steep trajectory.
3. The ability to fly at low speed for site selection and then short and safe landing on a rough coating platform.
4. Small length of the wing, which eliminates the risk of the wing touching the ground while flying at low altitude.
5. The high strength of the wing, the necessary room for maneuver on small radii bends.

The design of the wing

At large angles of attack there is a failure with the air flow of the wing. In this case, air can not smoothly flow around the wing and simply falls from its surface. As a result, the lift disappears, and the plane crashes.

Manufacturers of aircraft equipped with slats to tighten the stall air and flaps. So they have twice the lift coefficient with the help of simple devices.

Fixed slats

Through a opening located in the lower front portion slats take a significant amount of air and passes it through a narrow slit, located in a rear upper portion, thereby increasing the flow velocity and its direction on the upper wing surface tangentially. Retained laminar air flow on the upper surface of the wing supports the Venturi effect, the wing continues to operate the lift, even with considerable angles of attack during a steep rise.

Hover ailerons with flaps (flaperons)

FLAPERON located behind and below the wing, which ensures its maximum performance and complete blowout. The total area of ​​flaperons - 2,5 m², Deviation range varies from + to -50 13 degrees, which gives excellent handling plane (especially at low speeds).

Wing flaps and slats provides the perfect lift coefficient at low speeds during take-off and a slight drag.

Wing Aircraft "Aray" is characterized by a chord in 1600 mm, which fully compensates for its short length, it makes it simple, easy and reliable lifting device. For a relatively small wing span high profile also contributes to its high strength.

Wingtip

To lift the working area was increased and vibration on the wing "Aray" decreased apply ending of the "Horner". They contribute to an increase in the length of the aerodynamic wing at 200 millimeters.

Wings reinforced struts of steel pipes, which are attached to the brackets by bolts 4 fuselage for quick installation or removal.

Empennage

It is installed above the fuselage, which ensures maximum efficiency. To better control the vertical tail made tselnopovorotnym. Thus is possible to achieve laminar flow vertical stabilizer and flight machine in strong crosswinds that occurs when using a not oriented to the wind completely unprepared sites, located in the steppe regions of Kazakhstan.

The stabilizer and rudder (section of the horizontal tail) are specifically designed to ensure maximum safety at high angles of attack and low speed.

Stabilizer - is an inverted wing airfoil that provides amplification lift the bow and achieve maximum angle of attack (required to perform a shortened landing / take-off).

Elevator - normal airfoil section, which provides a good laminar flow when shifting down.

Microvortices generators mounted on the steering wheel height detained at high angles of attack stall wind on 10 degrees (at the indoor takeoff).

The cockpit and fuselage

The rectangular shape of the cockpit helps to maximize the workspace for the pilot, three passengers and luggage. Quadruple cabin has enough space to accommodate a stretcher with the patient, leaving room for the doctor and the pilot's seat.

Large doors allow easy access to the cabin for passengers, pilots and bulky luggage, if necessary, and the right rear seat can be removed, freeing up more space for cargo.

Though the square shape of the fuselage does not look aesthetically pleasing, but it is strong in bending and twisting. In addition, clear angles and flat wall of the fuselage allow to obtain excellent performance stability and contribute to resist breakdown in the stopper and slide sideways.

For safety during work aviahimicheskih cabin is equipped with mechanical seal doors and effective heating and ventilation system for a comfortable stay of the crew inside the aircraft in the harsh climatic conditions of Kazakhstan.

Dashboard

Dashboard, long 104 cm and a height of 28 cm, provides accommodation standard devices of the engine and aircraft navigation equipment to ensure the pilot comprehensive information for IFR (instrument flight rules) and VFR (visual flight rules).

On the instrument panel mounted aviation HF-VHF ICOM - A210 and the device GPS GARMIN ZUMO.

Overview of the cab

All experienced pilots realize that the flights are typical of agrochemical works at low altitude, to the presence of various obstacles (masts, poles, trees), with a stopover at the chosen site, placing the review of the special requirements of the cabin.

The wings of the aircraft, "Arai" located above the cabin, together with the rear cab windows and large door windows allow passengers and pilots get an excellent overview on the sides and bottom. The narrowing of the wings and the transparent roof increases the viewing angle of the "up". Horizontal visibility (straight ahead) provides chassis configuration with a nose strut, that first of all it is important for the security of running car on unprepared sites during takeoff / landing.

Chassis

The plane "Aray" commissioned by the customer is equipped with four or two welded aluminum fuel tanks (at 56 liters each), located behind the main spar inside the wing. The presence of the four tanks can increase the rate range of up to 1,2 thousand. Km.

Powerful one-piece spring is used for the main chassis. In combination with large wheels, it provides the machine with the ability to safely land / take off on a rough surface, while it requires almost no maintenance. As for the front wheel support, it has a powerful rubber shock absorber and is controlled by the rudder pedals. 

TECHNICAL SPECIFICATIONS OF THE PLANE CH 8000AG - "Aray"