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26012423-205 – Honeywell Aerospace DC Blower Kit
Available now on the Airparts.aero Marketplace.
The Honeywell 26012423-205 is a high-performance, aerospace-grade DC blower kit designed for critical thermal management within aircraft avionics bays, flight deck displays, and environmental control systems (ECS). Engineered for continuous-duty operation, this blower provides the high-velocity forced-air convection required to dissipate heat from densely packed electronic line-replaceable units (LRUs). In the pressurized and unpressurized environments of modern turbine aircraft, the 26012423-205 ensures that sensitive processors, navigation units, and communication transceivers remain within their certified operating temperature envelopes, preventing premature component degradation or "thermal runaway" failures.
Constructed with a lightweight, corrosion-resistant housing and a precision-balanced centrifugal impeller, this blower kit is optimized for high static pressure and low acoustic noise. The unit utilizes a 28V DC brushless motor architecture, providing a superior service life compared to traditional brushed motors by eliminating carbon dust and mechanical commutator wear. As an OEM component for various business and regional jets, the 26012423-205 is a mission-essential part of the aircraft’s active cooling strategy, facilitating the "forced-air" cooling logic required for high-reliability avionics integration.
Key Features
Brushless DC (BLDC) Technology: Features an electronically commutated motor that provides high reliability, reduced electromagnetic interference (EMI), and extended MTBF (Mean Time Between Failure).
Precision Centrifugal Impeller: The dynamically balanced blower wheel is designed to maximize airflow ($\text{CFM}$) against the back-pressure of avionics ducting and cooling manifolds.
Ruggedized Aerospace Housing: Manufactured from high-strength aluminum alloy or high-impact composite (configuration dependent), finished to resist the humidity and vibration cycles of high-altitude flight.
Integrated Thermal Protection: Includes internal circuitry to prevent motor burnout in the event of an inlet blockage or mechanical stall.
Low EMI/RFI Signature: Specifically shielded and filtered to meet the stringent requirements of RTCA DO-160 for electromagnetic compatibility with sensitive flight instruments.
Technical Specifications
Part Number: 26012423-205
Manufacturer: Honeywell Aerospace
Component Type: DC Centrifugal Blower / Cooling Fan Kit
Operating Voltage: 28V DC (Nominal)
Current Draw: Low-amperage, high-efficiency design (Refer to Honeywell technical data for precise mA rating)
Speed: Constant speed, optimized for consistent airflow delivery
Housing Material: Aerospace-grade Aluminum Alloy
Bearings: High-precision, dual-ball bearing system for multi-axis mounting capability
Certification: FAA-PMA / EASA Form 1 (with OEM traceability)
Standard Compliance: Designed to meet MIL-STD-810 and RTCA DO-160 environmental standards
Aircraft Compatibility
Bombardier Challenger & Global Series: Often utilized in avionics rack cooling and cabin air circulation.
Cessna Citation Series: 560, 680, and 750 models for cockpit display cooling.
Gulfstream G-Series: Integrated into various galley and equipment bay ventilation circuits.
Embraer E-Jet/ERJ: Supplemental cooling for flight-critical electronic modules.
Note: The Aircraft Illustrated Parts Catalog (IPC) is the final authority for verifying the specific dash-number application for your airframe serial number.
Applications
The 26012423-205 is utilized for Active Thermal Management. Its primary roles include:
Avionics Rack Cooling: Extracting heat from remote-mounted LRUs in the nose or tail equipment bays.
Cockpit Display Ventilation: Providing direct airflow to the rear of EFIS (Electronic Flight Instrument System) screens to maintain backlight longevity.
Galley/Cabin Ventilation: Ensuring airflow through localized ducting for passenger comfort or galley equipment heat rejection.
Why Choose 26012423-205?
Choosing a genuine Honeywell 26012423-205 blower kit ensures the airframe remains within its Type Certificate cooling requirements. Non-certified blowers often fail to provide the necessary static pressure to move air through restrictive filters or long duct runs, leading to localized "hot spots" that can cause expensive avionics to fail in-flight. Furthermore, the Honeywell BLDC motor is designed for the high-vibration environment of a turbine aircraft, where commercial-grade fans would suffer from bearing seizure and rotor imbalance.
The 26012423-205 functions as a fluid-moving turbomachine where the physics are governed by the Euler Turbomachinery Equation. As the impeller rotates, it imparts kinetic energy to the air, which is then converted into static pressure within the blower's volute housing. This unit is specifically engineered to overcome the system resistance curve of intricate aircraft ductwork. Because air density decreases with altitude, the blower's mass-flow rate is critical; the BLDC motor maintains a constant RPM to ensure that even in "thin" air, the volumetric flow rate remains sufficient to strip heat from electronic heat-sinks via forced convection. The housing utilizes anisotropic vibration damping mounts to ensure that the mechanical energy of the motor does not resonate through the airframe, maintaining the quiet cockpit environment required for long-haul operations.
Note: This is a flight-critical environmental component. Prior to installation, inspect the blower wheel for "nicks" or debris that could cause rotational imbalance. Ensure the airflow direction matches the ducting requirements (check the arrow on the housing). Installation must be performed by a certified A&P/IA mechanic in accordance with the Honeywell Maintenance Manual and the Aircraft Maintenance Manual (AMM). Periodically inspect the inlet screens for lint or dust buildup that can restrict airflow.
