T-HOBBY AM20 F3P-A Motor Buying Guide
The T-HOBBY AM20 F3P-A is designed for lightweight F3P indoor aircraft where low weight, smooth throttle response, and precise control matter more than maximum power. At around 10.1–10.3g, it is best suited to lightweight 50–100g aircraft.
Is the AM20 F3P-A Right for Your Aircraft?
| Your Aircraft | Recommendation |
|---|
| 50–100g F3P indoor aircraft | Excellent match |
| Lightweight 3D / precision indoor aircraft | Recommended |
| Lightweight outdoor fixed-wing | Possible, if the power requirement is modest |
| Heavy fixed-wing aircraft | Not recommended |
| FPV freestyle / racing drone | Not suitable |
1500KV or 1900KV?
| Version | Best For | Battery |
|---|
| 1500KV | Smooth, controlled F3P flying and 2S setups | 1–2S LiPo, optimized for 2S |
| 1900KV | Lightweight setups that prioritize higher RPM and responsive throttle | 1–2S LiPo, optimized for 1S |
-Choose 1500KV if your F3P build is primarily a 2S setup and you want smooth, predictable power.
-Choose 1900KV if you are building an ultra-light 1S aircraft and want a higher-RPM motor for responsive control.
Match the Motor With the Rest of Your Setup
For the best results, select the propeller, battery, and ESC as a complete power system rather than choosing the motor by KV alone.
-Propeller: T-HOBBY/T-Motor FS10×3.1 carbon propeller is a recommended match for the AM20 platform.
-Battery: Use a lightweight 1S or 2S LiPo, depending on the selected KV version and aircraft setup.
-ESC: Choose a lightweight fixed-wing ESC with a current rating appropriate for your selected propeller and battery combination.
-Airframe: Keep the overall aircraft lightweight. Adding unnecessary weight can reduce the handling advantage of a 10g-class motor.
Why Choose AM20 F3P-A?
The AM20 is worth considering when weight and precise low-speed control are more important than raw thrust. Its lightweight construction, F3P-focused design, integrated propsaver, and optimized KV choices make it particularly suitable for indoor precision and slow-flight aerobatics.
AM20 F3P-A vs AM40 F3P: Which One Should You Choose?
| T-HOBBY AM20 F3P | T-HOBBY AM40 F3P |
|---|
| Best for | Ultra-light F3P | 3D / 4D F3P |
| Aircraft weight | 50–100g | 150–320g |
| Flight style | Lightweight indoor / precision | 3D & 4D aerobatics |
| KV options | 1500KV / 1900KV | 1500KV / 1850KV |
| Power priority | Low weight & efficiency | Higher power & thrust |
| 4D thrust reversal | — | ✓ |
| Recommended for | Weight-sensitive builds | Performance-oriented builds |
Choose AM20 F3P-A if your aircraft is extremely lightweight and your priority is keeping the total aircraft weight low. It is the better fit for 50–100g F3P builds.
Choose AM40 F3P if your aircraft is larger or you want stronger power for 3D and 4D aerobatics. Its recommended aircraft weight is around 150–320g, and it supports reversible thrust for 4D flight.
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