SHCH-ZUM-BE

SHCH-ZUM-BE unit in the helmet-mounted target designation system

SHCH-ZUM-BE is a unit of the “Shchel-ZUM” helmet-mounted target designation system used in fighter aircraft avionics. The system is associated with optical-electronic sighting systems such as OEPS-29 and OEPS-27 and is used on aircraft including MiG-29 and Su-27. The unit works as part of the helmet sighting and weapon aiming loop, where pilot head movement is converted into target designation data. In Russian documentation, the product may be written as Щ-ЗУМ-БЭ, while BE (SHCHZUM) may appear as an alternative spare part or equipment-list designation.

Target designation function of SHCH-ZUM-BE

The SHCH-ZUM-BE unit supports processing of pilot line-of-sight data. During operation, the pilot turns the head toward the target, and optical sensors in the cockpit detect infrared signals from emitters installed on the pilot helmet. The unit processes these signals and helps calculate the angular position of the pilot’s line of sight. The resulting target designation data can then be transmitted to the aircraft weapon control and sighting systems. This allows off-boresight target cueing for compatible air-to-air weapons and optical-location equipment.

SHCH-ZUM-BE in the Shchel-ZUM system

The SHCH-ZUM-BE is not a standalone aiming device; it operates within the complete Shchel-ZUM helmet-mounted target designation system. The system includes helmet-mounted emitters, cockpit optical receiving devices, processing electronics, calibration equipment and aircraft interface channels. The BE designation normally refers to a specific block, onboard element or electronic unit within this system, depending on the document and spare parts nomenclature. Because the same item can be listed as Щ-ЗУМ-БЭ, БЭ (ЩЗУМ), SHCH-ZUM-BE or SHCHZUM BE, both Cyrillic and transliterated references should be included in technical requests.

Aircraft integration of the SHCH-ZUM-BE unit

The SHCH-ZUM-BE unit is installed in the aircraft avionics equipment area and is connected to the helmet-mounted target designation and sighting system. The unit is linked with the aircraft onboard computing and weapon control architecture, including internal data exchange channels used for target coordinates. In the described configuration, the system interfaces with aircraft computing and weapon control elements such as the Ts100 computer and the weapon control system. Correct installation is important because the unit must be aligned with the aircraft reference axis and calibrated as part of the complete system.

Calibration and adjustment of SHCH-ZUM-BE

The SHCH-ZUM-BE requires accurate calibration after installation, replacement or cockpit equipment adjustment. The unit has a fixed relationship to the aircraft structural axis, and its performance depends on correct alignment of the optical sensors, helmet emitters and electronic processing path. If the unit or related cockpit elements are replaced, adjustment and calibration must be performed with appropriate ground test equipment. Incorrect alignment can reduce target designation accuracy and affect target acquisition probability. For maintenance, the product should therefore be checked together with the complete helmet sighting system, not only by external condition.

Identification and transliteration of Щ-ЗУМ-БЭ

The recommended technical transliteration of Щ-ЗУМ-БЭ for English documentation is SHCH-ZUM-BE. This version preserves the Cyrillic letter “Щ” as SHCH and avoids confusion with “Ш”, which is normally transliterated as SH. The simplified form SH-ZUM-BE and European-style SCH-ZUM-BE may appear in some foreign or informal references, but SHCH-ZUM-BE is preferable for export catalogs and English-language technical documents. For ordering, it is useful to specify the original Cyrillic designation, the transliterated designation, aircraft type, system configuration, required condition, passport availability and calibration documentation.

Product Type: Helmet-mounted target designation system unit / onboard electronic unit
Designation: SHCH-ZUM-BE
Original Cyrillic Designation: Щ-ЗУМ-БЭ
Alternative Designations: BE (SHCHZUM), БЭ (ЩЗУМ), SHCHZUM BE, SH-ZUM-BE, SCH-ZUM-BE
System Name: Shchel-ZUM helmet-mounted target designation system
Russian System Name: Аппаратура нашлемной системы целеуказания «Щель-ЗУМ»
Function: Processing of helmet line-of-sight signals and generation of target designation data
Application / Where Used: Fighter aircraft helmet-mounted sighting and target designation systems
System / Installation Area: Optical-electronic sighting system and aircraft avionics equipment area
Compatible Aircraft / Equipment: MiG-29 and Su-27 aircraft, depending on installed OEPS configuration
Associated Systems: OEPS-29, OEPS-27, weapon control system, onboard computing system
Associated Helmet Types: ZSh-5 / ZSh-7 helmet configurations, depending on aircraft equipment
Target Designation Field, Azimuth: ±60°
Target Designation Field, Elevation: −15° to +60°
Line-of-Sight Measurement Accuracy: Approximately 0.5° to 1° within the pilot working area
Permissible Pilot Head Movement, Longitudinal Axis: ±50 mm
Permissible Pilot Head Movement, Vertical / Lateral Axis: ±20 mm
Time to Operating Readiness: Not more than 10 s
Sight Mark Appearance after Calibration: 4–5 s
Installation: Fixed installation in avionics equipment area on vibration-damping frame, according to aircraft documentation
Calibration: Required after replacement or adjustment of related cockpit/system elements
Condition: As applicable
Technical Documentation: Technical description, operating documentation, calibration documentation and test equipment procedures, if available

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.