HEATING AND EVAPORATION SYSTEM
9.1. GENERAL CHARACTERISTICS
The heating and evaporation system (Fig. 9.1) provides hot or atmospheric air supply into the cockpit, and also for air-cooling the glass paneling. In heating regime, the air is taken from the atmosphere or the cockpit and into the heating unit, which is situated under the control panel and covered by boards. The heating unit includes:
- a liquid-based radiator;
- an electric fan;
- a plastic casing;
- plastic air ducts.
The supply of hot liquid to the heating unit’s radiator from the helicopter’s evaporation system is done by metal pipelines. Choke and liquid supply controls are situated on the lower electric panel in the cockpit. The choke regulates air supply from the atmosphere or the cockpit. In the back part of the cockpit there are ventilation slits.
Figure 9.1 HEATING AND EVAPORATION SYSTEM DIAGRAM
Legend:
Горячий воздух Hot air
Заслонка Choke
Атмосферный воздух Atmospheric air
Рычаг управления положением заслонки Choke control lever
Кабинный воздух Cockpit air
Подача охлаждённой жидкости от двигателя/к двигателю Cool liquid supply to/from the engine
Перекрывной кран Shutoff valve
Вентиляционные щели Ventilation slits
GENERAL PROCESS TECHNOLOGY CHARACTERISTICS
10.1. Process technology development is basic in preparing the AK1-3 helicopter for production.
In developing process technology the source information was considered: design drawings of details, technical precision requirements, surface roughness parameter, and other quality requirements, such as yield. Technological processes were developed with regard to their regulation. This includes estimate and norm-setting in completing the work process; estimating the work category; estimating the material consumption norm.
10.1.1. Technological processes in part cutting
Before developing the technological processes for part cutting, each specific part’s construction and function in a unit (mechanism) was examined, and manufacturability analyses were carried out. Design drawings of details contain all the data necessary for full understanding of the detail’s manufacture and control, and comply with the existing standards.
10.1.2. Technological processes in part assembly
The technological processes of part assembly were based on assembly drawings, inspection specifications, and reference materials.
The assembly diagrams based on assembly drawings make the work process easier. There are subassembly diagrams for the elements which are dismounted unsorted and are parts of the article. And the parts dismounted separately are directly a part of the general assembly. The technological processes of part cutting and assembly are presented as flow-sheets and operational sheets.
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