Autogyro DAS-2. Drawing, description

PERSONAL TRANSPORT: GROUND, WATER, AIR
Free library / Directory / Personal transport: land, water, air

Autogyro DAS-2. Personal transport

Personal transport: land, water, air

Directory / Personal transport: land, water, air

The history of the creation of our gyroplane, which later received the name DAS-2M, has been going on for many years. For the first time, the DAS gyroplane flew into the air in a non-motorized version, towed by a Zhiguli car. It happened at one of the agricultural airfields near Tula. After the first flight, we realized that the device was a success. But it took more years, during which we worked on the engine, before the most experienced test pilot LII V.M. Semenov, after just one run, lifted the DAS-2M into the air. This event was later noted at the competitions of the ALS with a special prize from the Design Bureau named after M.L. Mil, as informed by the magazine "Modeler-Constructor". The device, according to the test pilot, has good flight characteristics and efficient control.

As experience has shown, a gyroplane is, first of all, a good power unit. No wonder the last nine years were given to him. During this time, a two-cylinder boxer engine was developed, which made it possible to obtain a static thrust of 145 kG, which made it possible for the gyroplane to successfully take off.

Technical characteristics of the autogyro DAS-2

Main screw

Rotor diameter, m ......... 6,60
Swept area, m2.........34,2
Blade narrowing.........1,6
Blade profile.........ACA 23012
Fill factor.........0,046
Rotor axis deviation: back.........0...+200
lateral.........0.. .+7

Horizontal tail

Stabilizer swing, m ......... 0,65
Stabilizer area, m2.........0,25
Shoulder of the horizontal tail, m ......... 0,7
Stabilizer Angle.........0°

Vertical plumage

Area, m2.........0,16
Shoulder vertical tail, m ......... 1,2
Rudder area, m2.........0,40
Angle of deflection.........+30

Fuselage

Width, m.........0,5
Midsection area, m2.........0,65

Chassis

Base, m ......... 1,23
Track, m ......... 1,72
Wheel dimensions: bow.........Ø300x80 mm
main.........Ø450x100 mm
Removal of the main wheels relative to the axis of the main rotor (backward), mm ......... 190

Weight data

Take-off weight, max ......... 280 kgf
Weight of an empty autogyro.........180 kgf
Fuel weight ......... 7 kgf
Specific load.........8,2 kgf/m2

Power point

Power, hp.........52
Maximum propeller speed, 1/min..........2500
Screw diameter, m ......... 1,46
Propeller thrust in place (at 2500 rpm), kgf .......... 130

Speed

takeoff, km/h.........40
landing, km/h.........0
cruising, km/h.........80
maximum, km/h.........100
rate of climb, m / s ......... 2,0

Design

Fuselage - truss, tubular, collapsible design. The main element of the fuselage is a frame consisting of horizontal and vertical (pylon) pipes with a diameter of 75x1, made of steel 30KhGSA. They are attached to a towing device with a lock and an air pressure receiver, a dashboard, a pilot's seat equipped with a seat belt, a control device, a three-wheeled chassis with a nose steerable wheel, a power unit mounted on a motor mount with a pusher propeller, a stabilizer, a keel with a rudder, a ball main rotor pivot. An auxiliary tail wheel with a diameter of 75 mm is installed under the keel. The pylon, together with struts with a diameter of 38x2 and a length of 1260 mm, tubular beams of the main wheels with a diameter of 42x2 and a length of 770 mm, made of titanium alloy VT-2, and braces with a diameter of 25x1 and a length of 730 mm made of 30KhGSA steel form a spatial load-bearing frame, in the center of which the pilot is placed. The pylon is connected to the horizontal fuselage tube and the ball joint of the main rotor by means of titanium scarves. Bougie made of V95T1 duralumin is installed in the tubes in the area of installation of scarves.

The power unit - with a pusher screw. It consists of a two-cylinder boxer two-stroke engine with a working volume of 700 cm3 with a gearbox, a pusher propeller and an electric starter, a friction clutch of the main rotor pre-rotation system, a gas tank with a capacity of 8 liters and an electronic ignition system. The power unit is located behind the pylon, on the motor frame.

The engine is equipped with a duplicated electronic non-contact ignition system and a tuned exhaust system.

The pushing wooden screw is driven by a V-belt gearbox, consisting of a driving and driven pulleys and six belts. To reduce the unevenness of the torque, dampers are installed on the gearbox.

The main rotor with a diameter of 6,60 m is two-bladed. The blades, consisting of a fiberglass spar, foam filling and coated with fiberglass, are installed with one horizontal hinge on a sleeve located on the pylon. At the ends of the blades there are uncontrolled trimmers for adjusting the conicity of the main rotor. The propeller hub is made of V95T1 grade duralumin. The axis of the main rotor with a diameter of 25 mm made of steel 30KhN2MVFA, connected to a horizontal hinge, rotates in tapered roller bearings. On the axis of the main rotor, the driven gear of the pre-rotation gearbox and the sensor of the main rotor tachometer are installed. The axes of the main rotor are placed on a ball joint, with which the upper control fork is connected. The latter has a panel with a drive gear of the reduction gear of the pre-rotation system, located on the overrunning clutch, and a device for forced disengagement of the gears of the reduction gear of the pre-rotation system of the main rotor. The gearbox is driven by means of cardan-splined shafts, an angular gearbox mounted on a pylon, and a friction clutch located on the engine. The friction clutch consists of a driven rubber roller mounted on the axis of the cardan-splined shaft, and a leading duralumin drum located on the engine axis. The friction clutch is controlled by a lever mounted on the control handle.

The layout of the autogyro DAS-2 (click to enlarge): 1 - air pressure receiver; 2 - towing lock; 3 - instrument panel; 4 - control knob; 5 - control lever of the friction clutch of the system of preliminary unwinding of the main rotor; 6 - parking brake lever; 7 - pilot's seat; 8 - carburetor throttle control lever; 9 - control lever for the device for forced uncoupling of the gears of the spin-up gearbox; 10 - control pedals; 11 - horizontal fuselage tube; 12 - brace; 13 - lower fork of the control system; 14 - driven gear of the spin-up gearbox; 15 - struts; 16 - pylon; 17 - axis of the horizontal hinge; 18 - axis of the main rotor; 19 - drive gear of the spin-up gearbox; 20 - overrunning clutch housing and a device for forced disengagement of the gears of the spin-up gearbox; 21 - thrust of the control system; 22 - cardan-splined shaft of promotion; 23 - carburetor; 24 - bearing housing of the friction clutch for promotion; 25 - pushing screw; 26 - pusher screw bushing; 27 - electric starter; 28 - pusher propeller gearboxes; 29 - gas tank; 30 - the main wheel of the chassis; 31 - keel; 32 - keel brace; 33 - rudder; 34 - auxiliary tail wheel; 35 - tubular beam of the main landing gear wheel; 36 - stabilizer-screen; 37 - brace console; 38 - rudder rocker In the front view, the main rotor is conventionally not shown.

Changes in roll and pitch are carried out by a handle that affects the position of the lower control fork connected by rods to the upper fork, which, in turn, leads to a change in the inclination of the plane of rotation of the main rotor. The forks are connected to the rods by standard connections using orientable bearings. The directional control is carried out by a rudder connected by cable wiring to the pedals, which also control the nose wheel. To compensate for the hinge moment, the rudder is equipped with a horn-type compensator. The rudder and keel of a symmetrical profile are made of 16 plywood ribs 3 mm thick, pine stringers 5x5 mm, covered with percale and covered with nitro-lacquer. The keel is mounted on a horizontal fuselage tube with anchor bolts and two cable braces. The relative thickness of the keel and rudder is 5%. The stabilizer with an area of 0,25 m2 is made of plywood 3 mm thick, covered with percale and painted. The stabilizer has a zero installation angle and also plays the role of a pusher propeller screen.

The autogyro chassis is three-wheeled. The front steering wheel with dimensions of 300x80 mm is connected to the pedals by means of a gear reducer having a gear ratio of 1:0,6 and is equipped with a drum-type parking brake with a diameter of 115 mm. The main wheels are 450x100 mm in diameter. The chassis track is 1,72 m, the base is 1,23 m. The tubular beams of the main wheels are mounted on the horizontal fuselage tube using rubber silent blocks, there are no chassis shock absorbers. In the winter version, the chassis wheels are replaced by skates or skis measuring 1,55x0,2 m. In the hydraulic version, the chassis design allows the installation of a float, the length of which is 3,5 m, the width is 1,6 m, the displacement is 500 kgf.

The instrument panel is located on the towing device truss. The instrument panel has a speed indicator, a variometer, an altimeter connected to an air pressure receiver, tachometers for the main and pusher propellers. On the control handle there is an emergency engine stop switch and a friction clutch control handle. The control levers for the throttle valve of the carburetor and the device for forced disengagement of the gears of the gearbox of the pre-rotation system are installed on the pilot's seat on the left. On the right is the ignition switch. To the left of the dashboard is the parking brake lever. The drive of all mechanisms of the autogyro is carried out using cables with Bowden shells.

Authors: V.Danilov, M.Anisimov, V.Smerchko

We recommend interesting articles Section Personal transport: land, water, air:

▪ Motorcycle headlight under control

▪ Wheelchair

▪ Paramotor Tatush 120

See other articles Section Personal transport: land, water, air.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Elevator across the highway 24.02.2003

In Germany, on the federal highway ?132, there is an elevator across the street.

It consists of two towers and a bridge between them, along which a passenger cabin runs, accommodating up to 8 people. The trajectory of the movement of the elevator car consists of two vertical and one horizontal sections. As in a conventional elevator, when moving vertically, the cabin is balanced by counterweights.

Moving at a speed of 1 m/s vertically and 1,5 m/s horizontally, the elevator overcomes a four-lane road in about 30 s. In the event of a power outage, the elevator automatically switches to battery power.

The indisputable advantage of the new way for pedestrians to overcome highways and other similar obstacles (railways, canals, etc.) is its increased safety, however, achieved at the cost of additional investments. Therefore, the mass introduction of new items is expected, mainly in countries where human life is considered the highest value, and in the near future we are most likely not threatened.

Other interesting news:

▪ IBM Telum processor

▪ Verbatim LED lamps with glare-free light output

▪ Memory Samsung DRAM CXL 2.0 128 GB

▪ Mice eat birds

▪ Virtualization of network functions on a 64-bit single-chip ARM system

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Microcontrollers. Article selection

▪ article Pull the gimp. Popular expression

▪ article What book did the writer ask to sell for exactly the price of a bottle of vodka? Detailed answer

▪ map scale article. Tourist tips