How to assemble an ARF RC aircraft step by step
A general ARF assembly workflow for many aircraft: dry fit, hinges, servo installation, power setup, CG, control checks and first-flight preparation.
HA20-4515 Brushless Standard Servo 50Kgf.cm 0.13sec/60° Dual Ball Bearing for Large Scale RC Planes, Competition RC Planes
Prices are intentionally not displayed on the site.
Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
HA20-4515 Brushless Standard Servo 50Kgf.cm 0.13sec/60° Dual Ball Bearing for Large Scale RC Planes, Competition RC Planes is a KST Servos product selected for Aircraft Servos. This page is written for practical buying decisions, with the key fit, size, voltage and performance details organized in one place.
Use it to compare torque, speed, voltage range, construction, dimensions, weight, variants and accessory compatibility before choosing the right component for an RC aircraft, helicopter, car, glider, UAV or workshop installation.
Key Advantages
- DC Brushless motor
- High Torque Output & Fast Response
- Dual Ball Bearings
- Hardened Steel Gear & CNC aluminium Case
- A2509HFA-3P Locking Plug Interface
- Hardened Steel Gear
Core Specifications
- Voltage Range: DC6.0V-8.4V
- Rated Voltage: DC7.4V
- Motor Type: Brushless DC Motor
- Gear Set Material: Hardened Steel
- Ball Bearing: 2BB
- Case Dimensions: 40.5*20*42mm±0.2mm
- Weight: 72g±10%
- Item: HA20-4515 Servo
- Torque: 36Kgf.cm@6.0V, 45Kgf.cm@7.4V, 50Kgf.cm@8.4V
- Working Frequency: 1520us/333Hz
- Default Travel Angle: ±50°=100°Total
- Temperature Range: -10℃……+65℃
Relevant RC Academy guides
Learn before you buy
These guides explain the setup, safety checks and accessory choices that usually matter for this product type.
Servo selection: torque, speed, gears and voltage
How to select servos for trainers, sport aircraft, large models, cars and boats without under-sizing a control surface.
How to balance an RC aircraft and find the correct CG
One of the most important setup guides: find the CG, install the flight battery, balance the aircraft and avoid nose-heavy or tail-heavy surprises.
Mandatory pre-flight checks for safer RC flying
A repeatable inspection routine for control direction, radio range, failsafe, battery, fasteners, propeller, CG and field readiness.
How to perform the first test flight of an RC aircraft
Ground checks, takeoff planning, trim passes, battery timing and first landing strategy for a new or repaired RC aircraft.
| Technical Specifications | |
| Manufacturer | KST Servos |
| Brand | KST |
| Product Code | BR0023.0255 |
| All Variant SKUs | BR0023.0255 |
| Rated Voltage | DC7.4V |
| Voltage Range | DC6.0V-8.4V |
| Working Frequency | 1520us/333Hz |
| Default Travel Angle | ±50°=100°Total |
| Temperature Range | -10℃……+65℃ |
| Case Material | Aluminium Alloy |
| Motor Type | Brushless DC Motor |
| Gear Set Material | Hardened Steel |
| Position Sensor | Potentiometer |
| Ball Bearing | 2BB |
| Case Dimensions | 40.5*20*42mm±0.2mm |
| Weight | 72g±10% |
| KST Collections | Industrial, Standard Servos, HA Series |
| Series | HA Series |
| Size Class | Standard Servos |
| Application | Aircraft Servos |
| Features | DC Brushless motor; High Torque Output & Fast Response; Dual Ball Bearings; Hardened Steel Gear & CNC aluminium Case; A2509HFA-3P Locking Plug Interface; Hardened Steel Gear; Programmable; Ideal for Large Scale RC Planes, Competition RC Planes |
| Package Includes | 1 * HA20-4515 Servo; 4 * Mounting Screw; 4 * Eyelet; 4 * Grommet; 1 * CNC Servo Horn |
| Item | HA20-4515 Servo |
| Torque | 36Kgf.cm@6.0V, 45Kgf.cm@7.4V, 50Kgf.cm@8.4V |
| Product Type | RC |
Tags: KST Servos, BR0023.0255, Industrial & UAV Servos, Standard Servos, HA Series, Aircraft Servos, RC servo