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.
BLS88WP Waterproof Brushless Micro Servo 8.5kg.cm 0.07sec 8.4V for RC Car, RC Boat, RC Seaplane is a KST Servos product selected for Car 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 | BR0023.0219 |
| All Variant SKUs | BR0023.0219 |
| Rated Voltage | DC7.4V |
| Voltage Range | DC6.0V-8.4V |
| Working Frequency | 1520μs/333Hz |
| Default Travel Angle | ±50°= 100°Total |
| Temperature Range | -20°C.....+65C |
| Soft Start | Programable |
| Programmable | Yes |
| Case Material | Aluminum Alloy |
| Motor Type | Brushless DC Motor |
| Gear Set Material | Hardened Steel |
| Position Sensor | Potentiometer |
| Case Dimensions | 24mm*13mm*30mm±0.2mm |
| Weight | 21g±10% |
| KST Collections | Car Servos, Micro Servos, BLS Series |
| Series | BLS Series |
| Size Class | Micro Servos |
| Application | Car Servos |
| Features | Ultra High Torque & Excellent Speed; IP67 Waterproof; Programmable; Soft Start; Brushless DC Motor with Micro Size; CNC Aluminum Case; Double Ball Bearings; Ideal for 1/12 Pan Car, 1/16 & 1/18 Crawler, RC Boat and RC Seaplane |
| Package Includes | 1 * BLS88WP Micro Servo; 5 * Plastic Servo Horn; 1 * Servo Horn Screw; 4 * Mounting Screw; Download |
| Item | BLS88WP Micro Servo |
| Torque | 7.5Kgf.cm@6.0V , 8.0Kgf.cm@7.4V , 8.5Kgfcm@8.4V |
| Speed | 0.09sec/60°@6.0V , 0.08sec/60°@7.4V , 0.07sec/60°@8.4V |
| Product Type | RC |
| Waterproof | IP67 |
Tags: KST Servos, BR0023.0219, Car Servos, Micro Servos, BLS Series, RC servo
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