The **2822HC90-RTR** typically refers to a high-performance **Brushless Outrunner Motor** assembly, often used in Radio Controlled (RC) hobbyist applications such as fixed-wing aircraft or multicopters. Below is a breakdown of its electronic and physical specifications. --- ### 1. Technical Specifications This table outlines the typical parameters for this class of motor: | Parameter | Typical Value / Range | | :--- | :--- | | **Motor Type** | Brushless Outrunner | | **KV Rating** | 900 KV - 1100 KV (approx.) | | **Stator Diameter** | 28 mm | | **Stator Height** | 22 mm | | **Cell Count** | 2S - 3S LiPo (7.4V - 11.1V) | | **Max Continuous Current** | 10A - 15A | | **Shaft Diameter** | 3.17 mm (standard) | --- ### 2. Key Electronic Components The "RTR" (Ready-to-Run) or assembly kit usually involves the following electronic parts: #### A. The Stator and Windings * **Copper Coils:** The stationary part of the motor consisting of high-purity copper windings. The number of turns determines the KV (RPM per Volt). * **Lamination:** Silicon steel sheets used to minimize eddy current losses. #### B. The Rotor (Bell) * **Permanent Magnets:** High-strength Neodymium magnets (usually N45 or N50 grade) are attached to the inner wall of the rotating outer casing. * **Dynamic Balance:** The bell is balanced to prevent vibrations at high RPMs. #### C. Bearings and Shaft * **Ball Bearings:** High-speed shielded bearings to reduce friction and heat. * **Hardened Steel Shaft:** Transmits the torque from the motor to the propeller. #### D. Connections * **Bullet Connectors:** Usually 3.5mm gold-plated connectors that plug into the Electronic Speed Controller (ESC). * **Lead Wires:** High-temperature silicone insulated wires. --- ### 3. Required Peripheral Electronics To operate the 2822HC90, the following components are necessary: 1. **Electronic Speed Controller (ESC):** Must be rated for at least **20A to 30A** to ensure a safety margin. 2. **LiPo Battery:** A **3S (11.1V)** battery is standard for this motor size to achieve optimal thrust. 3. **Propeller:** Recommended sizes are usually **9x4.7 or 10x4.7** (Slow Flyer props). --- ### 4. Application Safety > [!IMPORTANT] > Because this is a brushless motor, it **cannot** be connected directly to a DC battery. It requires a 3-phase signal from an ESC. Ensure the "RTR" assembly has all screws tightened (Loctite recommended) before the first flight.