Navigation
Related

Navigation

Related

Hangar doors and hydraulic handling system, max towing force 5.5t (Technical supply specification)


1. General Information (Operating Conditions)

The hangar doors and helicopter handling system operate under the following conditions:

  • continuous roll of up to 10° to any side;
  • continuous trim of up to 2° by the bow or stern;
  • roll at Sea State 6;
  • wind load of up to 400 Pa (40 kgf/m²);
  • ambient air temperature from -50°C to +45°C.

When secured for sea, the hangar doors and helicopter handling system maintain their operational integrity after long-term exposure to:

  • roll of up to 15° to any side;
  • trim of up to 5° by the bow or stern;
  • roll with an amplitude of 22.5° from the vertical and a period of 7–9 s;
  • pitch with an amplitude of 10° from the vertical;
  • wind of up to Beaufort Force 11 (wind load of up to 2000 Pa);
  • ambient air temperature down to -50°C inclusive;
  • shipboard vibration;
  • periodic exposure to sea water spray.

The equipment climate version is OM1 according to GOST 15150-69.


2. Purpose

The hangar doors ensure, when the door leaves are open, the transportation of Mi-8 (Mi-38) type helicopters from the hangar to the helipad and back, and, when the door leaves are closed, personnel access to the hangar.

The helicopter handling system ensures the movement/transportation of Mi-8 (Mi-38) type helicopters from the helipad to the hangar and back.

Helicopter handling system and hangar door dimensional drawing main view
Helicopter handling system and hangar door dimensional drawing main view

About

Synergy in Action: How Hangar Doors and Helicopter Handling Systems Work Together

The task of smoothly moving an aircraft from a protected hangar to the helipad and back resembles a complex dance where every movement must be precise. The key partners in this process are the hangar doors and the helicopter handling system Their coordinated operation ensures not only prompt response but also maximum safety for both equipment and personnel.

Intelligent Control of Complex Mechanisms

Modern hangar doors and helicopter handling systems are not just mechanical structures, but smart systems. They are operated from centralized control stations, allowing the operator to monitor the entire cycle: from opening the massive door leaves to the pinpoint positioning of the helicopter inside the hangar. This integration eliminates human error and significantly speeds up the process.

Durability and Reliability under Extreme Conditions

The nature of operation on marine vessels imposes exceptional durability requirements. Hangar doors and helicopter handling systems are designed to withstand continuous exposure to aggressive saline environments, wind loads, and ship motion. The use of specialized materials and engineering solutions guarantees that the equipment will operate reliably even far from shore.

Automation for Flawless Safety

The most critical aspect is ensuring safety. The helicopter handling system is equipped with sensors and automatic shutdown systems that prevent overload or abnormal movement. The hangar doors feature protective loops that block closing if an obstruction is detected. The implementation of such automated protocols minimizes risks.

Unified Technological Complex

Thus, the operational efficiency of shipborne aviation depends on how harmoniously the hangar doors and the helicopter handling system interact. Designing them as a unified complex, rather than separate devices, is the key to creating reliable and durable systems.

Experience and Expertise in Creating Integrated Solutions

The development and manufacture of complex marine systems, including hangar doors and helicopter handling systems, is carried out by the Russian company Izhora Hydrosystems LLC. The accumulated experience in specialized machinery and hydraulics enables the company to create integrated systems in which the hangar doors and the helicopter handling system operate as a single, dependable mechanism that complies with strict marine operation requirements and safety standards.


3. Scope of Supply

3.1 Helicopter Hangar Door

3.1.1 Bill of Materials (BOM)

ComponentQuantity
Hangar door left leaf with personnel access door1 pc.
Hangar door right leaf1 pc.
Hangar door non-adjustable hinges1 set
Hangar door adjustable hinges1 set
Hangar door weld-on coaming sections1 set
Hangar door removable coaming sections1 set
Hangar door opening angle limit stops1 set
Hangar door dogging device1 set
Hangar door hydraulic cylinders1 set
Hydraulic power unit with electric drive and manual pump (shared with HTV)1 pc.
Hangar door control panel1 pc.
Hydraulic manifold block (shared with HTV)1 pc.
Control cabinet (shared with HTV)1 pc.
Helicopter hangar door dimensional drawing front view
Helicopter hangar door dimensional drawing front view

3.1.2 Key parameters

ParameterValue
TypeElectro-hydraulic double-leaf door
Clear opening size (W x H), min.5400 x 7200 mm
Leaf opening angle, min.100°
Opening time, max.90 s
Total weight, max.6200 kg
Helicopter hangar door dimensional drawing top view
Helicopter hangar door dimensional drawing top view

3.1.3 Spare Parts, Tools and Accessories (SPTA) Kit

Manufacturer’s standard SPTA kit for one year of operation.

3.1.4 Documentation

DocumentQuantity
Logbook/Passport1
Technical description1
Operating instructions1
Installation instructions1
Diagnostics and repair instructions1
Component description1
Drawings with specifications1
SPTA list1

3.1.5 Certificates

The helicopter hangar door and the helicopter handling system are certified by the Russian Maritime Register of Shipping.

3.2 Helicopter Handling System (HHS)

3.2.1 Bill of Materials (BOM)

ComponentQuantity
HHS hydraulic winch with wire rope, right-hand configuration1 pc.
HHS hydraulic winch with wire rope, left-hand configuration1 pc.
HHS wheel chock with locking mechanism1 set
HHS wheel chock1 set
HHS rollers complete with deck sockets1 set
Helicopter towing/handling arrangement1 set
HHS local control panel1 pc.
HHS connection and storage cabinet for portable control panel1 pc.
HHS portable control panel with 25 m cable1 pc.

3.2.2 Key parameters

ParameterValue
DriveTwo hydraulic winches with towing wire ropes
Pulling force, min.5.5 t
Helicopter handling speed0.2 m/s (12 m/min)
Travel distance40 m
Total weight, max.2500 kg
Power consumption (HHS and hangar door drive), max.53 kW

3.2.3 Spare Parts, Tools and Accessories (SPTA) Kit

Manufacturer’s standard SPTA kit for one year of operation.

3.2.4 Documentation

DocumentQuantity
Logbook/Passport1
Technical description1
Operating instructions1
Installation instructions1
Diagnostics and repair instructions1
Component description1
Drawings with specifications1
SPTA list1

3.2.5 Certificates

The equipment is certified by the Russian Maritime Register of Shipping.

4. Additional Requirements

4.1 Design and Material Requirements

  • The helicopter hangar door and the helicopter handling system have optimal dimensions and weight while ensuring the required performance parameters and reliable operation.
  • Components and parts weighing between 20 and 40 kg are equipped with lifting attachments, as well as for manual carrying by two persons.
  • Components and parts weighing over 40 kg are equipped with lifting and deck transport attachments.
  • The hangar door design ensures spray-tightness.
  • The helicopter hangar door leaves are supplied insulated and lined.
  • The helicopter hangar door design provides fixed stoppers for the open leaves and a dogging/locking device for the closed leaves.
  • A personnel access door is integrated into one of the two helicopter hangar door leaves. The door is equipped with a mechanical push-button cylinder lock to prevent unauthorized access to the hangar from the outside.
  • The helicopter handling system deck sockets are equipped with plugs to prevent ingress of water and debris into the sockets when the rollers are removed.
  • The helicopter handling system winches are fitted with a spooling device and ensure proper wire rope spooling on the drum.
  • The equipment design prevents any accidental contact with live electrical parts.
  • Structural steel materials are applied in accordance with regulatory documents agreed upon or approved by the Russian Maritime Register of Shipping.
  • Structural materials comply with operating conditions and lower limit ambient temperatures.
  • Steel structures are protected against corrosion.
  • Materials used in the manufacture of the products, including all types of insulation and paint coatings, are non-combustible or fire-retardant, do not promote flame spread, and comply with shipbuilding regulatory documentation.
  • Material quality is verified by the manufacturer’s certificates.

4.2 Electrical Power Supply and Electrical Equipment Requirements

  • The equipment is powered from a 3-phase AC 400 V, 50 Hz marine power grid with an isolated, non-grounded neutral.
  • All necessary conversions into parameters other than the 3~50 Hz, 400 V supply grid are performed by the equipment’s internal circuit solutions.
  • The electrical equipment ensures reliable operation under power supply fluctuations in accordance with Section 2.1.3 of Part XI of the Rules for the Classification and Construction of Sea-Going Ships by the Russian Maritime Register of Shipping.
  • The control cabinet is designed for simultaneous power supply from two independent sources. The cabinet is equipped with a manual transfer switch for main and backup power selection.
  • The electrical equipment, its installation, power supply lines, and grounding comply with the requirements of Part XI “Electrical Equipment” of the Rules by the Russian Maritime Register of Shipping.
  • The electrical equipment is provided with cable glands and grounding elements. All electrical equipment is supplied complete with cable glands ensuring the specified degree of protection.
  • The ingress protection rating of the electrical equipment is not less than IP56 according to GOST 14254-2015 on the open deck, and not less than IP44 for indoor equipment.
  • Electrical equipment installed in open areas is certified to operate at temperatures down to minus 50°C.
  • Electrical equipment located or used inside the helicopter hangar and on the helideck is explosion-proof. Explosion-proof electrical equipment complies with the Ex class according to GOST 30852.0-2002 and has a protection level corresponding to at least temperature class T3 and explosion group IIA. Explosion-proof electrical equipment complies with the requirements of Section 2.9 of Part XI of the Rules by the Russian Maritime Register of Shipping and is supplied complete with special explosion-proof cable glands with threads to enable tight connection with cable conduits.
  • Electrical equipment is supplied complete with motor starting and protection gear ensuring smooth starting characteristics for electric motors.
  • The pump unit electric drive circuit provides the following types of protection:
  • under-voltage protection to prevent automatic restarting of the electric motor upon power restoration after a failure;
  • electric motor overload protection;
  • control circuit short-circuit protection;
  • phase failure protection; interlocking against plugging;
  • operation interlocking in case the hydraulic fluid temperature rises above the maximum allowable limit, as well as if the fluid level in the hydraulic tank drops below the allowable limit;
  • helicopter handling system winch operation interlocking in case of overload (pulling force exceeding the allowable working load).
    • The pump unit electric drive circuit provides the following types of protection:
    • under-voltage protection to prevent automatic restarting of the electric motor upon power restoration after a failure;
    • electric motor overload protection;
    • control circuit short-circuit protection;
    • phase failure protection;
    • interlocking against plugging;
    • operation interlocking in case the hydraulic fluid temperature rises above the maximum allowable limit, as well as if the fluid level in the hydraulic tank drops below the allowable limit;
    • helicopter handling system winch operation interlocking in case of overload (pulling force exceeding the allowable working load).
    • Если вы хотите продолжить, отправьте следующий фрагмент.

4.3 Control and Safety Requirements

  • To warn personnel of hangar door leaf movement and helicopter transfer, an audible signal (siren) is provided.
  • To prevent injury to personnel in the path of the hangar door leaves, an emergency stop function and work area monitoring via a light curtain sensor system are provided.
  • To arrest the movement of the door leaves and the helicopter handling system, interlocking devices with limit switches are provided.
  • The hangar door opening and closing is controlled from a local control panel inside the hangar within the line of sight of the door leaves. Backup control is provided via a hand pump located in the hydraulic power unit room.
  • The helicopter handling system is operated from a local control panel inside the hangar or from a portable control pendant within the line of sight of the helicopter transfer area on the helideck.
  • Emergency stop red mushroom buttons are provided on the control panels to isolate the electric drive.
  • The helicopter hangar door and the helicopter handling system ensure personnel safety during operation, maintenance, and repair in accordance with occupational safety standards.
  • All electrical equipment is grounded.
  • The audible warning signal emitted during equipment operation is clearly audible within the working area.
  • The equipment and systems comply with fire safety requirements.
  • The crew is fully protected from exposure to electrical current, toxic, and foul-smelling substances during normal equipment operation, as well as in the event of failures or damage.

4.4 Hydraulic System Requirements

  • The hydraulic system complies with the requirements of Part VIII “Systems and Piping” of the Rules by the Russian Maritime Register of Shipping.
  • The hydraulic system, equipped with a single hydraulic power unit shared by both the door and the helicopter handling system, provides hydraulic energy to the hangar door leaf cylinders and the hydraulic winches of the Helicopter Handling System (HHS).
  • The hydraulic fluid is suitable for operation at ambient temperatures from minus 40 to plus 45 °C and storage at temperatures down to minus 50 °C.
  • Pipes and fittings are made of stainless steel, and hoses comply with ISO 6945.
  • The hydraulic system provides for: replacement of hydraulic drive elements, piping, and filters without draining the fluid from the hydraulic tank; continuous filtration of the working fluid (the return line filter features a bypass valve); and interlocks in case of oil overheating in the hydraulic tank.
  • A hand pump is provided to enable operation of the hydraulic station in the event of a power failure.

4.5 Painting Requirements

  • The helicopter hangar door and the helicopter handling system feature the following painting scheme:
    • Electrical equipment color (cabinets, control panels) — RAL 7035 (Light grey).
    • Hydraulic equipment color (helicopter handling system winches, hydraulic cylinders) — RAL 6019 (Pastel green).
    • Hangar door structural steel color — RAL 9010 (Pure white).

4.6 Reliability, Service Life and Warranty Requirements

  • The service life begins from the moment the systems are commissioned on the icebreaker.
  • The service life of the helicopter handling system equipment, including maintenance, covers the icebreaker’s operating period until the first shipyard overhaul, which is at least 20 years.
  • The service life of the hangar door, including maintenance, covers the icebreaker’s operating life of at least 40 years.
  • The warranty period for the equipment and its components is specified in the shipyard’s tender documentation.

4.7 Other Requirements

  • The helicopter hangar door and the helicopter handling system are fitted with a rigidly secured identification plate indicating the manufacturer and the unique SFI code.
  • The hydraulic power unit, hydraulic valve block, and control cabinet included in the helicopter hangar door and helicopter handling system suite with two winches represent common equipment shared by the HHS winches and the hangar door.
  • In all matters not specified in these technical requirements, the equipment complies with the requirements of the Rules by the Russian Maritime Register of Shipping.

5. Manufacturer

Izhora Hydrosystems LLC


6. Warranty Period

12 months from the date of shipment, unless otherwise provided by the contract.

Contacts

Phone: +7 (812) 339-61-68

Email: contact@i-hydro.tech