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 The overall technical lifetime (design life) of the helicopter is 2,000 flight hours. 
The passing of design life is warranted by revisions and checkups that are included in regular technical service.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
BRIEF DESCRIPTION OF THE HELICOPTER’S CONSTRUCTION
 
4.1. GENERAL PROVISIONS
 АК1-3 (Fig. 4.1.) is a modular construction using different construction materials. In manufacturing the details and units we have considered the experience of similar production, technical documentation, and aviation building norms.
 

 
 
4.1. Legend:
 Несущий винт   Rotor
Лопасть несущего винта  Rotor blade
Несущий вал   Drive shaft
Хвостовое оперение  Tail unit
Хвостовая балка   Tail boom
Автомат перекоса  Wobble plate
Главный редуктор  Propulsion 
                                                   reduction gear
Ременная передача  Belting 
  Кабина   Cockpit
Шасси   Undercarriage
Радиатор   Radiator
Топливный бак  Fuel tank
Лопасть рулевого винта Anti-torque  
                                                  rotor blade
Двигатель   Engine
Рама    Framework
 
 

 
Figure 4.1. LAYOUT DIAGRAM
 
4.2. MATERIALS USED
The bulk of materials used in manufacturing the helicopter is presented in Table 4.1.
Protective coating includes blueing, anodization, and painting.
 
 
Table 4.1 
CONSTRUCTION MATERIALS 
Name of component
 Material
 
Rotor blades 
 
Anti-torque rotor blades
 Glass fiber cloth Т-25
Organic fiber art.56313
Glue VК-41 TU1 596-67-80
Brass L63 GOST 931-70
Alloy POS-80 GOST 1499-91
Building agent EDT-69N 
Styrofoam Rohacell 51
 
Framework
 Steel 30HGSA GOST 4543-86
 
Undercarriage
 Steel 30HGSA GOST 4543-86
Alloy D-16Т GOST 4784-97, PТ 7-1
 
Wobble plate
 Alloy D-16Т GOST 4784-97, textolite, 
titanium VТ 3-1 GOST 19807-91
 
Cockpit
 Glass fiber cloth Т-10-80 GOST 19170-73
Carbonic cloth
Glass thread
Lorit 287, 285, Styrofoam
Acrylic plastic
 
Tail boom
 Steel 30HGSA GOST 4543-86, titanium VТ 3-1 GOST 19807-91, 
alloy D-16Т GOST 4784-97, steel 08Х15N5D2ТS (VNS-2), rubber 7-В-14 ТU 38405-395-78
 
Anti-torque rotor hub
Rotor hub
 Steel 30HGSA GOST 4543-86, VТ 3-1, D-16Т, bulk graphite zytel polyamide ТU 6-05-988-93, , steel 08Х15N5D2ТS (VNS-2), glass fiber cloth Т-25, building agent EDT-69N
 
Floor
 16 mm plywood, glass fiber cloth Т-10
Carbonic cloth
Lorit 287, 285
 

 
 
 
4.3. FRAMEWORK
The framework (Fig. 4.2) is a welded construction made of pipes, and serves as a base for different components of the helicopter.
 Overall dimensions:       1133х720х878 mm

 
Legend:  
Труба   Pipe
 

 
 Figure 4.2. FRAMEWORK
 
 
 
4.4. COCKPIT
The cockpit (Fig. 4.3) is designed for the crew, the controls, and the equipment.
In the fore-part of the pilots’ cockpit is a control panel with monitoring, В передней части кабины пилотов расположена приборная панель с комплектом контрольно-измерительных, aviation, and radio equipment. In the control panel’s base is the cockpit heater. On the cockpit’s ceiling are the headset holders; on the back panel is a n internal lighting lamp.
　
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