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Technical Specifications
Last Updated: 2026-07-10| Identity | |
| Brand |  |
| Product Number | WK-0902H |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V27.77 oz-in2.00 kg-cm0.2 N-m |
| Speed |
4.8V0.08 sec/60°750.0 deg/s125.0 RPM |
| Physical | |
| Weight | 0.29 oz8.2 gAbove Average |
| Dimensions |
L 0.88 in W 0.47 in H 1.04 in L 22.4 mm W 11.9 mm H 26.5 mm |
| Control & Signal | |
| Modulation | Digital |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Weight | Above Average Lighter than 66% of 575 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.64 W |
| Power Density | 1.488 W/in³ More power-dense than 40% of 544 Digital Micro servos |
| Torque Density | 3.3866 oz-in/g |
| Torque-to-Volume Ratio | 64.37 oz-in/in³ |
| Speed-to-Weight | 1.52439 (1/sec·g) |
| Speed-Torque Trade-off | 2.22 |
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Reviews (2)
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betibeau
May 20, 2013Application(s): uflys, esky V3,V4, Commanch etc....
Comments: Only 2, mainly due to price and quality. HKSCM9-6 or HKscm9-5 are excellent, faster and cheaper. Do not get be fooled by the Walkera brand name. B rgds - thb
flyinfosheezy
July 30, 2012Application(s): Tail rotor servo for 250 size electric heli.
Comments: After only 2 easy flights the tail servo started wagging on 3rd flight. Each subsequent flight attempt the tail servo twitched erratically then locked in full deflection without any input from transmitter. Servo got very warm and then failed. Total life of the tail servo was less than 30 minutes. I would not recommend as a replacement servo.