T-MOTOR U8 II PRO KV100
Series: T-MOTOR Brushless motors for drones
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The U8 II PRO KV100 from T-MOTOR, a Chinese maker, is an efficiency motor of the U series with protection rating IP56 (36N42P) for 12S industrial multicopters with propellers of 27 to 28 inches.
The motor weighs 287 g including the cable and measures 87.3 x 29.55 mm. At KV 100 and 47 V that works out to about 4,700 rpm at no load. Power and peak current, 1,450 W and 31 A, apply for 180 s and fit 47 V. The maximum thrust of 9,122 g is a test-stand value with the G28x9.2 propeller at 47 V, 31.11 A and 100 % throttle, about 32 times the motor's own weight. Anyone comparing power values needs the same time base of 180 s.
IP56 means protection against dust and against powerful water jets; it covers the motor, not the ESC and battery. For EU classification the take-off mass of the whole aircraft counts: C3 and C4 reach up to 25 kg, above that the specific category with an operational authorisation applies, and Remote ID is mandatory for C1 to C3. A 12S battery passes the 160 Wh air-transport limit from about 3.6 Ah.
In selection, hover efficiency counts, not the peak value; the ESC must allow 12S and carry the 31 A with headroom. The weight of 287 g includes the cable. The protection rating depends on intact seals: besides the bearing run, the winding insulation and the bell's concentricity, check the condition of the seals after work in dust and wet.
Technical data
Other data
| Cell count (S) | 12Scorrect |
|---|---|
| Dimensions (mm) | 87.3x29.55correct |
| KV (rpm per volt) | 100correct |
| Maximum current (A) | 31 Acorrect |
| Maximum power (W) | 1,450correct |
| Maximum thrust (g) | 9,122correct |
| Power rating time base (s) | 180correct |
| Recommended propeller | G28x9.2correct |
| Weight (g) | 287correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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