RI-65B

RI-65B is an onboard voice message and annunciation system designed for automatic verbal warning of aircraft crew members and ground command post operators (via onboard radio equipment) about emergency situations and hazardous operating modes during flight, as well as for reproduction of standard commands triggered by signals from onboard systems.

The RI-65B system automatically generates and outputs voice messages when control signals are received from onboard warning sensors in the form of DC voltage or pulse signals. Voice messages are delivered directly to the crew headsets and simultaneously to the input of the aircraft radio transmitter, enabling transmission to ground services.

RI-65B is a комплекс system consisting of the RI-65-10 voice message unit, RI-65-20 remote control panel, and RI-65-30 matching amplifier. The system provides high speech intelligibility even under intense aircraft acoustic noise conditions.

The equipment is designed for reliable operation under severe aviation environments, including vibration, shock and linear loads, wide temperature ranges, high humidity, and exposure to frost and dew. RI-65B is widely used on aircraft and helicopters and is also applied as part of advanced voice warning systems such as Almaz-UP.

Purpose: Voice warning of aircraft crew and ground operators about emergency and hazardous conditions
Systems: Onboard aircraft voice message and annunciation systems
Application: Aircraft and helicopters equipped with voice warning equipment
Product Type: Onboard voice message system
Model: RI-65B
Alternative Designations: RI 65 B, RI65B, ri-65-b, ri 65 b, ri65b
System Configuration: RI-65-10 voice message unit, RI-65-20 control panel, RI-65-30 matching amplifier
Functions: Automatic playback of voice messages, crew and ground notification via radio link
Dynamic Range: Not less than 35 dB
Speech Intelligibility: Not less than 96% at aircraft noise level up to 120 dB
Power Line EMI Level: 1–0.2 mV in the 0.15–150 MHz frequency range
Playback Cycle Duration: 10–12 s (double playback of RI-65-10 messages)
Gain Range: 0.7 to 1.5
Linear Amplitude Deviation: Not more than 2 dB up to 120 V output
Frequency Response Non-Uniformity: Not more than 6 dB in the 300–3400 Hz range
Total Harmonic Distortion: Not more than 10% at 1 kHz and 120 V output
Amplifier Outputs: High-impedance and low-impedance
RI-65-10 Power Output: 35 W (up to 40 W during climatic testing)
RI-65-30 Power Consumption: 10 W (normal mode), 16 W (emergency mode)
Power Supply Voltage: 24.3–29.7 V DC
Operational Voltage Range: 20–30 V DC
Housing Materials: RI-65-10 – plastic; RI-65-20 – plastic; RI-65-30 – aluminum
Dimensions: RI-65-10 – 160×228×228 mm; RI-65-20 – 70×70×50 mm; RI-65-30 – 71×108×120 mm
Weight: RI-65-10 ≤6.5 kg; RI-65-20 ≤0.3 kg; RI-65-30 ≤1.2 kg
Operating Temperature Range: −60 … +60 °C
Relative Humidity: Up to 98% at +40 °C
Atmospheric Pressure: 665–106,000 Pa
Vibration Loads: 5–300 Hz up to 60 m/s²
Linear Loads: Up to 10 m/s²
Shock Loads: Up to 12 m/s²
Environmental Conditions: Frost and dew
Condition: As specified at delivery
Documentation: Technical passport and operating documentation available upon request

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.