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.
MS825 V8.0 HV Contactless Hall Sensors Brushless Servo 35Kgf.cm 0.11sec for Large Scale 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.
These guides explain the setup, safety checks and accessory choices that usually matter for this product type.
How to select servos for trainers, sport aircraft, large models, cars and boats without under-sizing a control surface.
A buying table for matching servo size, torque, speed, gear type and voltage to trainers, gliders, 3D aircraft, EDF jets and Giant Scale models.
Mechanical setup guide for servo arms, linkage angles, throw, control horns, neutral position and radio setup after geometry is correct.
Make an aircraft calmer for beginners by setting low rates, high rates and expo without hiding mechanical setup problems.
Failsafe setup for electric and fuel aircraft: throttle behavior, receiver signal loss, switch positions and safe verification before flight.
| Technical Specifications | |
| Manufacturer | KST Servos |
| Brand | KST |
| Product Code | BR0023.0124 |
| All Variant SKUs | BR0023.0124 |
| Rated Voltage | DC7.4V |
| Voltage Range | DC6.0V-8.4V |
| Stalling Torque | 25Kgf.cm@6.0V / 30Kgf.cm@7.4V / 35Kgf.cm@8.4V |
| No-load Speed | 0.15sec/60°@6.0V / 0.13sec/60°@7.4V / 0.11sec/60°@8.4V |
| Working Frequency | 1520μs/333Hz |
| Default Travel Angle | ±100°=200° Total |
| Temperature Range | -20℃.......+65℃ |
| Soft Start | Programmable |
| Programmable | Yes |
| Case Material | Aluminium Alloy |
| Motor Type | Brushless DC Motor |
| Gear Set Material | Hardened Steel |
| Position Sensor | Contactless |
| Ball Bearing | 2BB |
| Case Dimensions | 40.5mm*20mm*38mm±0.2mm |
| Weight | 70g±10% |
| KST Collections | Industrial, Standard Servos, MS Series |
| Series | MS Series |
| Size Class | Standard Servos |
| Application | Aircraft Servos |
| Features | Support 8.4V High Voltage; High Torque & Fast Speed; Programmable; Contactless Hall Sensor; Brushless DC Motor; Hardened Steel Gear; Dual Ball Bearings; Ideal for Large Scale RC Planes |
| Package Includes | 1 * MS825 V8.0 Brushless Servo; 1 Pack of Accessories; Download; Technical Specification of MS825 Servo |
| Item | MS825 V8.0 Brushless Servo |
| Product Type | RC |
Tags: KST Servos, BR0023.0124, Industrial & UAV Servos, Standard Servos, MS Series, Aircraft Servos, RC servo
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