C54-2Y L Acro 6.7:1 Competition Kv 1425
C54-2Y L Acro 6.7:1 Competition Kv 1425
Product description and features
The Hacker C54 inrunner motor is the first choice for F3A competition pilots who demand the highest standards of precision and performance. This 4-pole inrunner motor with Acro-Comp gearbox was specially developed to meet the requirements of demanding F3A aerobatics and offers an unrivalled combination of performance, efficiency and reliability with very good cooling. The integrated high-performance fan cools the C54 Acro Competition motors in the most efficient way. Thanks to its asymmetrical air outlet holes, the running noise has been reduced to a minimum. The 4-pole high-performance rotors made of optimized magnet material also contribute to this. The external housing design with milled cooling grooves offers perfect heat dissipation with minimum weight. The high power output of the C54 Acro Competition motors is guaranteed at all times by the proven Acro high-performance gearbox with 8 mm output shaft.
This weight-optimised high-end motor weighs only 445g and fits perfectly in F3A models with a 10S Lipo setup.
Delivery contents
1x C54-2Y L Acro 6.7:1 Competition Kv 1425 and manual.
Drive recommendation

| Technical Specifications | |
| Number of poles | 4 |
| Turns | 2 Y |
| No-load current (I0) at 37V [A] | 1.3 |
| Internal resistance (Ri) [Ohm] | 0.014 |
| Gear ratio | 6.7:1 |
| Shaft | 8mm with M8x1 thread |
| Recommended timing [°] | 5-10 |
| Recommended frequency [kHz] | 8 |
| Controller recommendation [A] | 90 – 125 |
| Idle speed per volt (kv) without gear | 1425 |
| Weights and Dimensions | |
| Weight [g] | 445 |
| Outer diameter [mm] | 46 |
| Shaft diameter [mm] | 8 |
| Delivery contents | |
| Prop adapter | yes |
| Fastening cross | no |
| Gold contacts (soldered) | 4mm |
| Back mountable | no |
| Front mountable | yes |









