U3 Product Introduction
The QK-U3 multi rotor DC brushless motor is designed specifically for 3-8kg high thrust unmanned aerial vehicles such as aerial photography, delivery services, and agricultural crop protection. Adopting a unique side hole design to accelerate airflow and increase motor heat dissipation efficiency by 2.5 times; Using high temperature resistant 180 ℃ imported oxygen free copper wire with better short-circuit resistance, coupled with 0.2mm high specification imported silicon steel sheet, to ensure full slot rate, reduce motor heating, minimize eddy currents, and strive to improve efficiency by every percentage point; Using imported high-quality large bearings, the operation is smoother, the noise is lower, and the load has a fault free working time of up to 1600 hours.
● Maximum tensile force 1.8kg
● Suitable for 3-8kg multi rotor unmanned aerial vehicles
● Load fault free working time up to 1600 hours
● Recommended voltage 4S, recommended electrically adjustable ALPHA 40A 6S, AIR 40A 6S, recommended P12 * 4 carbon fiber propeller
● Recommended takeoff weight: 4kg for four axles, 6kg for six axles, and 8kg for eight axles
Stable/Durable

U3 waterproof power type
Suitable for various mid to high end multi rotor aircraft in the 3-8kg class.

Industrial-grade Dustproof Waterproof
U3 Unique side hole design

The unique side hole design allows for faster airflow, and the motor's heat dissipation efficiency is 2.5 times that of ordinary motors; In addition, the design of the six hole inclined surface on the motor housing further improves the waterproof and dustproof level (waterproof level 3).
U3 Irregular axis anti loosening design
| Irregular axis anti loosening design |
U3 High quality enameled wire
Use imported oxygen free copper coils with better short-circuit resistance and 180 degree temperature resistance.

| Precision winding |
Large bearings with low noise |
|
U3 Packing method

Installation method of carbon slurry Other installation methods
U3 Recommended Pairings
Battery voltage: 4S Recommended Award: 12 inch Plastic Award 12 * 4 carbon propeller
Takeoff weight of the whole machine: 4-axle-4KG Six axis -6KG Eight axis -8KG

U3 Engineering drawing

U3 Product Parameters
Basic Parameters | |||
Resistance | 50mΩ | Slot Pole | 12N14P |
Shaft diameter | 4mm | Motor size | Φ41.8×30.75mm |
Line number | 18# | Line length | 600mm |
Motor weight (including wire) | 128g | Motor weight (excluding wires) | 97g |
Support lithium batteries | 3-4S | No-load current | 0.5A |
Maximum continuous power | 80W | Maximum current | 25A |
Test parameters | |||||||||
Serial number | Voltage (V) | Propeller | Throttle | Current (A) | Power (W) | Tensile force (G) | Speed | Power efficiency (G/W) | Motor temperature (℃) |
U3 KV700 | 11.1 | 12*4CF | 50% | 2.5 | 27.75 | 350 | 4000 | 12.61 | 40 |
65% | 4.8 | 53.28 | 550 | 4900 | 10.32 | ||||
75% | 6.6 | 73.26 | 700 | 5500 | 9.56 | ||||
85% | 9.1 | 101.01 | 870 | 6300 | 8.61 | ||||
100% | 11.1 | 123.21 | 1000 | 6600 | 8.12 | ||||
13*4.4CF | 50% | 2.9 | 32.19 | 400 | 3800 | 12.43 | 42 | ||
65% | 5.6 | 62.16 | 650 | 4900 | 10.46 | ||||
75% | 7.9 | 87.69 | 830 | 5300 | 9.47 | ||||
85% | 10.5 | 116.55 | 1000 | 6000 | 8.58 | ||||
100% | 12.6 | 139.86 | 1100 | 6400 | 7.87 | ||||
14*4.8CF | 50% | 4.1 | 45.51 | 550 | 3500 | 12.09 | 43 | ||
65% | 7.7 | 85.47 | 890 | 4500 | 10.41 | ||||
75% | 10.7 | 118.77 | 1060 | 4900 | 8.92 | ||||
85% | 14.5 | 160.95 | 1300 | 5500 | 8.08 | ||||
100% | 17.3 | 192.03 | 1460 | 5800 | 7.6 | ||||
14.8 | R11*3.7CF | 50% | 3.2 | 47.36 | 460 | 5300 | 9.71 | 43 | |
65% | 6 | 88.8 | 710 | 6500 | 8 | ||||
75% | 8.2 | 121.36 | 870 | 7500 | 7.17 | ||||
85% | 11 | 162.8 | 1080 | 8200 | 6.63 | ||||
100% | 13 | 192.4 | 1230 | 8700 | 6.39 | ||||
12*4CF | 50% | 3.8 | 56.24 | 580 | 5000 | 10.31 | 43 | ||
65% | 7.4 | 109.52 | 880 | 6300 | 8.04 | ||||
75% | 10.3 | 152.44 | 1100 | 7300 | 7.22 | ||||
85% | 14 | 207.2 | 1360 | 7700 | 6.56 | ||||
100% | 16.8 | 248.64 | 1600 | 8300 | 6.44 | ||||
13*4.4CF | 50% | 4.7 | 69.56 | 730 | 4900 | 10.49 | 47 | ||
65% | 9 | 133.2 | 1120 | 6100 | 8.41 | ||||
75% | 12.3 | 182.04 | 1400 | 6800 | 7.69 | ||||
85% | 16 | 236.8 | 1600 | 7400 | 6.76 | ||||
100% | 19.4 | 287.12 | 1800 | 7850 | 6.27 | ||||
Attention: The motor temperature is the temperature at which the motor runs for 10 minutes at 100% throttle. | |||||||||
U3 Packing List

Attention: Before using this product, please check if all the above items are included in the product packaging. If there are any missing items, please contact customer service in a timely manner or leave us a message:aerialflight@ttbridge.com
U5 Product Introduction
The QK-U5 multi rotor DC brushless motor is designed specifically for 8-12 kg high thrust unmanned aerial vehicles in aerial photography, photography, delivery services, and agricultural crop protection. Adopting a unique side hole design to accelerate airflow and increase motor heat dissipation efficiency by 2.5 times; Using imported oxygen free copper wire with better short-circuit resistance at 180 ° C and precision winding, paired with 0.2mm high specification imported silicon steel sheet, to ensure full slot rate, reduce motor heating, minimize eddy currents, and strive to improve efficiency by every percentage point; Using imported high-quality large bearings, the operation is smoother, the noise is lower, and the load has a fault free working time of up to 1600 hours.
● Maximum tensile force 2.85kg
● Suitable for 8-12 kg multi rotor unmanned aerial vehicles
● Load fault free working time up to 1600 hours
● Recommended voltage 6S, recommended electrically adjustable AIR 40A 6S, recommended propeller P16 * 5.4-inch carbon fiber propeller;
● Recommended takeoff weight: 9-axle 9kg, 8-axle 12kg
Stable/Durable/Powerful

U5 waterproof power type
Suitable for various mid to high end multi rotor aircraft in the 8-12 kg class.

Industrial-grade Dustproof Waterproof
U5 Unique side hole design

The unique side hole design allows for faster airflow, and the motor's heat dissipation efficiency is 2.5 times that of ordinary motors; In addition, the design of the six hole inclined surface on the motor housing further improves the waterproof and dustproof level (waterproof level 3).
U5 Irregular axis anti loosening design
Irregular axis anti loosening design |
|
U5 High quality enameled wire
Use imported oxygen free copper coils with better short-circuit resistance and 180 degree temperature resistance.

| Precision winding |
Large bearings with low noise |
|
U5 Packing method

Installation method of carbon slurry Other installation methods
U5 Recommended Pairings
Battery voltage: 4S Recommended slurry: 15 * 5 or 16 * 5.4 carbon propeller
Takeoff weight of the entire aircraft: Six axis -9KG Eight axis -12KG

U5 Engineering drawing

U5 Product Parameters
Basic Parameters | |||
Resistance | 116mΩ | Slot Pole | 12N14P |
Shaft diameter | 5mm | Motor size | Φ42.5×37.5mm |
line number | 16# | Line length (mm) | 600mm |
Motor weight (including wire) | 195g | Motor weight (excluding wires) | 156g |
Support lithium batteries | 3-8S | No-load current | 0.3A |
Maximum continuous power | 120W | Maximum current | 30A |
Test parameters | |||||||||
Serial number | Voltage (V) | Propeller | Throttle | Current (A) | Power (W) | Tensile force (G) | Speed | Power efficiency (G/W) | Motor temperature (℃) |
U5 KV400 | 22.2 | 14*4.8CF | 50% | 3.4 | 75.48 | 800 | 4300 | 10.6 | 45 |
65% | 6.3 | 139.86 | 1200 | 5400 | 8.58 | ||||
75% | 8.5 | 188.7 | 1500 | 5900 | 7.95 | ||||
85% | 11.4 | 253.08 | 1820 | 6500 | 7.19 | ||||
100% | 13.7 | 304.14 | 2030 | 6950 | 6.67 | ||||
15*5CF | 50% | 4.3 | 95.46 | 990 | 4200 | 10.37 | 50 | ||
65% | 7.9 | 175.38 | 1490 | 5200 | 8.5 | ||||
75% | 11.6 | 257.52 | 1900 | 5700 | 7.38 | ||||
85% | 14.5 | 321.9 | 2220 | 6200 | 6.9 | ||||
100% | 17.2 | 381.84 | 2480 | 6500 | 6.49 | ||||
16*5.4CF | 50% | 5.2 | 115.44 | 1200 | 4050 | 10.4 | 59 | ||
65% | 9.4 | 208.68 | 1750 | 4850 | 8.39 | ||||
75% | 13 | 288.6 | 2120 | 5400 | 7.35 | ||||
85% | 16.9 | 375.18 | 2650 | 5850 | 7.06 | ||||
100% | 20 | 444 | 2850 | 6250 | 6.42 | ||||
Attention: The motor temperature is the temperature at which the motor runs for 10 minutes at 100% throttle. | |||||||||
U5 Packing List

Attention: Before using this product, please check if all the above items are included in the product packaging. If there are any missing items, please contact customer service in a timely manner or leave us a message:aerialflight@ttbridge.com
U7-V2.0 Product Introduction
The QK-U7 V2.0 multi rotor DC brushless motor is designed specifically for high thrust unmanned aerial vehicles weighing 10-24 kilograms, including aerial photography, photography, delivery services, and agricultural crop protection. Adopting a unique side hole design to accelerate airflow and increase motor heat dissipation efficiency by 2.5 times; Using imported oxygen free copper wire with better short-circuit resistance and 180 ℃ high temperature resistance, coupled with 0.2mm high specification imported silicon steel sheet, to ensure full slot rate, reduce motor heating, minimize eddy currents, and strive to improve efficiency by every percentage point; Using imported high-quality large bearings, the operation is smoother, the noise is lower, and the load has a fault free working time of up to 1600 hours.
● Maximum tensile force 4.64kg
● Suitable for 10-24 kg multi rotor unmanned aerial vehicles;
● The load has a fault free working time of up to 1600 hours;
● Supports voltage of 3-8S
● U7 V2.0 KV280 is recommended to be paired with P20 * 6-inch carbon fiber propellers. The takeoff weight of the four axle machine is 8kg, the takeoff weight of the six axle machine is 12kg, and the takeoff weight of the eight axle machine is 18kg
● U7 V2.0 KV420 is recommended to be paired with P16 * 5.4 inch carbon fiber propellers. The takeoff weight of the four axle machine is 10kg, the takeoff weight of the six axle machine is 15kg, and the takeoff weight of the eight axle machine is 20kg
● U7 V2.0 KV490 is recommended to be paired with P18 * 6.1-inch carbon fiber propellers, with a four axle takeoff weight of 12kg, a six axle takeoff weight of 18kg, and an eight axle takeoff weight of 24kg
Stable/Durable/Powerful

U7-V2.0 waterproof power type
Suitable for various mid to high end multi rotor aircraft in the 10-24 kg class.

Industrial-grade Dustproof Waterproof
U7-V2.0 Featured Design
| Unique side hole design |
Irregular axis anti loosening design |
|
High quality enameled wire with large bearings and low noise

Imported oxygen free copper coil with better short-circuit resistance and 180 degree temperature resistance, paired with high-quality imported bearings, can work without faults for up to 1600 hours under load, making the motor run smoother, have a longer lifespan, and produce less noise.
High specification imported silicon steel sheet with precision winding |
|
U7-V2.0 Packing method

U7-V2.0 Recommended Pairings

2KG/axis U7-280KV, efficiency up to 9.6G/W | 2.5KG/shaft U7-490KV | 3KG/shaft U7-420KV |
U7-V2.0 Engineering drawing

U7-V2.0 Product Parameters
Basic Parameters | |||
KV value | 280 | Slot Pole | 12N14P |
Resistance | 71mΩ | Motor size | Φ60.7×39.5mm |
Shaft diameter | 6mm | Line length | 750mm |
Line number | 16# | Motor weight (excluding wires) | 255g |
Motor weight (including wire) | 317g | No-load current | 0.5A |
Support lithium batteries | 3-8S | Maximum current | 35A |
Maximum continuous power | 204W | / | / |
KV value | 420 | Slot Pole | 12N14P |
Resistance | 33mΩ | Motor size | Φ60.7×39.5mm |
Shaft diameter | 6mm | Line length | 750mm |
Line number | 16# | Motor weight (excluding wires) | 255g |
Motor weight (including wire) | 296g | No-load current | 0.9A |
Support lithium batteries | 3-8S | Maximum current | 40A |
Maximum continuous power | 350W | / | / |
KV value | 490 | Slot Pole | 12N14P |
Resistance | 21mΩ | Motor size | Φ60.7×39.5mm |
Shaft diameter | 6mm | Line length | 750mm |
Line number | 16# | Motor weight (excluding wires) | 258g |
Motor weight (including wire) | 299g | No-load current | 1.1A |
Support lithium batteries | 3-8S | Maximum current | 44A |
Maximum continuous power | 500W | / | / |
Test parameters | ||||||||||
Serial number | Voltage (V) | Propeller | Throttle | Current (A) | Power (W) | Tensile force (G) | Speed | Power efficiency (G/W) | Torque (N * m) | Motor temperature (℃) |
U7 V2.0 KV280 | 24 | 18*6.1CF | 50% | 3.5 | 84 | 980 | 3133 | 11.67 | 0.221 | 56.6 |
55% | 4.6 | 110 | 1191 | 3432 | 10.79 | 0.266 | ||||
60% | 5.8 | 139 | 1405 | 3707 | 10.09 | 0.312 | ||||
65% | 7.3 | 175 | 1662 | 4017 | 9.49 | 0.365 | ||||
75% | 10.3 | 247 | 2108 | 4538 | 8.53 | 0.459 | ||||
85% | 14.2 | 341 | 2634 | 5051 | 7.73 | 0.57 | ||||
100% | 20.5 | 492 | 3303 | 5680 | 6.71 | 0.715 | ||||
20*6CF | 50% | 4.8 | 115 | 1267 | 2992 | 11 | 0.309 | 78 | ||
55% | 6.3 | 151 | 1549 | 3271 | 10.24 | 0.37 | ||||
60% | 8.4 | 202 | 1907 | 3620 | 9.46 | 0.454 | ||||
65% | 10.05 | 241 | 2124 | 3843 | 8.81 | 0.513 | ||||
75% | 14.24 | 342 | 2717 | 4309 | 7.95 | 0.639 | ||||
85% | 19.4 | 466 | 3281 | 4779 | 7.05 | 0.785 | ||||
100% | 27.4 | 658 | 4078 | 5263 | 6.2 | 0.973 | ||||
22*6.6CF | 50% | 6.2 | 149 | 1565 | 2856 | 10.52 | 0.408 | HOT | ||
55% | 8.5 | 204 | 1956 | 3154 | 9.59 | 0.519 | ||||
60% | 10.6 | 254 | 2264 | 3391 | 8.9 | 0.588 | ||||
65% | 13.2 | 317 | 2615 | 3638 | 8.25 | 0.676 | ||||
75% | 18.6 | 446 | 3281 | 4052 | 7.35 | 0.835 | ||||
85% | 25.7 | 617 | 3926 | 4417 | 6.37 | 1.007 | ||||
100% | 35.1 | 842 | 4640 | 4809 | 5.51 | 1.209 | ||||
U7 V2.0 KV420 | 22.2 | 15*5CF | 50% | 6.1 | 135 | 1160 | 4500 | 8.57 | 45 | |
65% | 11.7 | 260 | 1870 | 5700 | 7.2 | |||||
75% | 15.3 | 340 | 2260 | 6300 | 6.65 | |||||
85% | 20.8 | 462 | 2690 | 6850 | 5.83 | |||||
100% | 24.7 | 548 | 3030 | 7250 | 5.53 | |||||
16*5.4CF | 50% | 7.3 | 162 | 1350 | 4550 | 8.33 | 47 | |||
65% | 13.6 | 302 | 2130 | 5500 | 7.05 | |||||
75% | 18.6 | 413 | 2630 | 6000 | 6.37 | |||||
85% | 24.2 | 537 | 3050 | 6550 | 5.68 | |||||
100% | 28.7 | 637 | 3360 | 6900 | 5.27 | |||||
25 | 17*5.8CF | 50% | 10 | 250 | 1940 | 4500 | 7.76 | 51 | ||
65% | 18.2 | 455 | 2880 | 5700 | 6.33 | |||||
75% | 25.4 | 635 | 3530 | 6300 | 5.56 | |||||
85% | 32.9 | 823 | 4080 | 6900 | 4.96 | |||||
100% | 39.7 | 993 | 4560 | 7200 | 4.59 | |||||
18*6.1CF | 50% | 12 | 300 | 2250 | 4200 | 7.5 | 59 | |||
65% | 22.5 | 563 | 3330 | 5200 | 5.92 | |||||
75% | 31 | 775 | 4050 | 6000 | 5.23 | |||||
85% | 39.8 | 995 | 4500 | 6200 | 4.52 | |||||
100% | 47.5 | 1188 | 5060 | 6700 | 4.26 | |||||
U7 V2.0 KV490 | 22.2 | 15*5CF | 50% | 9.3 | 206 | 1600 | 5300 | 7.75 | 46 | |
65% | 18 | 400 | 2400 | 6600 | 6.01 | |||||
75% | 25.6 | 568 | 3060 | 7500 | 5.38 | |||||
85% | 33.3 | 739 | 3680 | 8100 | 4.98 | |||||
100% | 39.8 | 884 | 4100 | 8500 | 4.64 | |||||
16*5.4CF | 50% | 10.3 | 229 | 1800 | 5100 | 7.87 | 48 | |||
65% | 19.5 | 433 | 2600 | 6200 | 6.01 | |||||
75% | 26.6 | 591 | 3220 | 6840 | 5.45 | |||||
85% | 35.2 | 781 | 3860 | 7420 | 4.94 | |||||
100% | 48.1 | 1068 | 4620 | 8000 | 4.33 | |||||
14.8 | 17*5.8CF | 50% | 7.1 | 105 | 1100 | 3500 | 10.47 | 44 | ||
65% | 12.9 | 191 | 1720 | 4300 | 9.01 | |||||
75% | 18.5 | 274 | 2190 | 4900 | 8 | |||||
85% | 24.7 | 366 | 2600 | 5300 | 7.11 | |||||
100% | 30.3 | 448 | 3000 | 5640 | 6.69 | |||||
18*6.1CF | 50% | 8.4 | 124 | 1280 | 3420 | 10.3 | 45 | |||
65% | 15.6 | 231 | 2020 | 4200 | 8.75 | |||||
75% | 21.8 | 323 | 2500 | 4650 | 7.75 | |||||
85% | 29 | 429 | 2900 | 5100 | 6.76 | |||||
100% | 34.6 | 512 | 3240 | 5370 | 6.33 | |||||
25 | 17*5.8CF | 50% | 14 | 350 | 2260 | 5000 | 6.46 | 57 | ||
65% | 25.5 | 638 | 3450 | 6000 | 5.41 | |||||
75% | 34.8 | 870 | 4020 | 6700 | 4.62 | |||||
85% | 44.5 | 1113 | 4790 | 7200 | 4.31 | |||||
100% | 53 | 1325 | 5070 | 7600 | 3.83 | |||||
18*6.1CF | 50% | 16.8 | 420 | 2720 | 4900 | 6.48 | 60 | |||
65% | 29.5 | 738 | 3850 | 5400 | 5.22 | |||||
75% | 40 | 1000 | 4510 | 6000 | 4.51 | |||||
85% | 50 | 1250 | 5080 | 6300 | 4.06 | |||||
100% | 62 | 1550 | 5600 | 6800 | 3.61 | |||||
Attention: The motor temperature is the temperature at which the motor runs for 10 minutes at 100% throttle. | ||||||||||
U7-V2.0 Packing List

Attention: Before using this product, please check if all the above items are included in the product packaging. If there are any missing items, please contact customer service in a timely manner or leave us a message:aerialflight@ttbridge.com



















