DA-30P

DA-30P combined vertical-speed, turn and slip indication

DA-30P is a combined cockpit instrument that brings together a vertical-speed indicator, a turn indicator and a slip indicator in one housing. It gives the crew three related pieces of flight information without requiring separate panel instruments. The variometer shows climb or descent rate, the electrically driven turn section indicates the direction and approximate rate of a turn, and the ball-type inclinometer shows whether the manoeuvre is coordinated or accompanied by slip or skid.

The unit belongs to the altimeters and flight indicators category. Its three sections operate on different physical principles but share a common face and mounting body. This compact arrangement is useful where panel space is limited and makes DA-30P a distinctive replacement item that must be identified by its exact designation and installation documentation.

Vertical-speed measurement through static pressure

The DA-30P variometer is connected to the static-pressure system. Static pressure enters both the sensitive manometric element and the instrument housing, while calibrated capillary passages delay pressure equalisation. During level flight the pressures balance and the vertical-speed pointer remains at zero. During a climb or descent, the temporary pressure difference moves the pointer in the corresponding direction.

The indicated vertical-speed range is up to 30 m/s for both climb and descent. Passport data specifies operation at altitudes up to 12,000 m and a static-system leakage limit of 4 mmHg per minute when tightness is checked at an equivalent altitude of 3,000–4,000 m. Correct indications therefore depend on the condition of the static line, the rear pressure connection, the calibrated restriction and the instrument mechanism.

Turn and slip information on DA-30P

The turn section uses an electrically driven gyroscopic mechanism. Its scale is calibrated for representative bank angles of 15°, 30° and 45° at a flight speed of 400 km/h, corresponding to angular turn rates of approximately 1.3°/s, 2.9°/s and 5°/s. Passport tolerance for the turn indication at these reference points is not more than ±4°.

The pointer should return from an extreme position to the zero mark within 1.2–3 seconds. Deflection caused by a 90° transverse bank is limited to ±2°, and pointer stiction is limited to ±3°. The separate curved-tube inclinometer responds to lateral acceleration and gravity; its ball gives the crew a direct visual cue for slip or skid and helps assess whether a turn is coordinated.

Electrical supply, lighting and cockpit installation

The gyroscopic section is supplied from a three-phase 36 V AC, 400 Hz network. The product passport gives a voltage tolerance of +1.8/−3.6 V, a frequency tolerance of ±8 Hz and current consumption of no more than 0.2 A in each phase. The integrated red-and-white illumination uses 5 ± 0.5 V. Technical descriptions specify a readiness time of approximately three minutes after power is applied.

The variometer itself works from the static-pressure line, while the turn mechanism needs electrical power and the slip indicator works mechanically. Installation therefore requires both a sealed pressure connection and the correct electrical connector. Wiring, lighting voltage, mounting and circuit protection must be checked against the documentation for the individual airframe.

Documented applications and ordering checks

Technical material confirms DA-30P installations on the Yak-40 and Yak-42. Documentation also describes installation on the right pilot instrument panel of selected An-26 retrofit configurations, where it replaced the EUP-53 turn indicator. Applicability must not be transferred automatically to every modification of these types.

Before ordering, confirm the DA-30P marking, passport code 6A2.527.014 PS, scale version, electrical connector, static-pressure fitting, panel mounting and required documentation. The known passport delivery set includes the instrument, mounting hardware and a REMD24B10B1 mating socket. Reliable public data for the exact overall dimensions and connector pin count were not found, so these values should be checked from the offered unit or approved installation drawing.

Product Type: Combined vertical-speed, turn and slip indicator

Designation: DA-30P

Alternative Designations: ДА-30П; DA 30P; ДА 30П; combined rate-of-climb, turn and slip indicator

Passport Designation: 6A2.527.014 PS

Functions: Vertical-speed indication; turn direction and approximate turn-rate indication; slip/skid indication

Internal Instruments: Variometer; gyroscopic turn indicator; ball-type slip indicator

System: Flight-instrument and static-pressure systems

Confirmed Applications: Yak-40; Yak-42; selected modified An-26 installations

Documented Installation: Pilot instrument panel; right pilot panel in the documented An-26 retrofit

Vertical-Speed Range: Up to ±30 m/s

Reference Flight Speed for Turn Scale: 400 km/h

Reference Bank Angles: 15°; 30°; 45°

Reference Angular Turn Rates: 1.3°/s; 2.9°/s; 5°/s

Turn-Indication Error: Not more than ±4° at the specified reference points

Pointer Return Time: 1.2–3 s from an extreme position to zero

Cross-Bank Error: Not more than ±2° at 90° transverse bank

Pointer Stiction: Not more than ±3°

AC Power Supply: 36 V, tolerance +1.8/−3.6 V

Supply Frequency: 400 ± 8 Hz

Current Consumption: Not more than 0.2 A in each phase

Integrated Lighting Supply: 5 ± 0.5 V, red-and-white illumination

Readiness Time: Approximately 3 min according to airframe technical descriptions

Operating Temperature Range: −60 °C to +60 °C

Operating Altitude: Not more than 12,000 m

Static-System Tightness: Pressure decrease not more than 4 mmHg per minute at an equivalent altitude of 3,000–4,000 m

Mass: Not more than 1.5 kg

Delivery Set: DA-30P, 1 pc; mounting screws, 4 pcs; washers, 8 pcs; REMD24B10B1 mating socket, 1 pc

Contained Materials: Silver 0.26 g; aluminium 0.79 kg; copper 0.11 kg

Dimensions and Connector Pin Count: Reliable public data were not found

Technical Documentation: Product passport 6A2.527.014 PS, installation drawing, wiring diagram and airframe maintenance documentation when 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.