T-Motor Pacer 2505

Listed as: T-Motor Pacer 2505 - Pale Rose

T-Motor Pacer 2505
Image: racedayquads.com
Stator2505
KV options1850
Weight31.25 g
Shaft4mm
Max cells4-6S
Configuration12N14P
DimensionsØ30.4x28.8 mm
Winding resistance69 mOhm
Max thrust1912.61 g
Price (approx.)31.99 USD

Thrust data (T-Motor bench test)

KVPropBatteryThrottleCurrentRPMThrustEfficiency
1850 GF7040-3 4S 30 1.99 A 7754 209.56 g 6.24 g/W
1850 GF7040-3 4S 40 4.11 A 9871 369.48 g 5.35 g/W
1850 GF7040-3 4S 50 7.43 A 11879 560.13 g 4.5 g/W
1850 GF7040-3 4S 60 11.88 A 13651 763.99 g 3.86 g/W
1850 GF7040-3 4S 70 16.98 A 15018 950.19 g 3.38 g/W
1850 GF7040-3 4S 80 22.26 A 16142 1118.3 g 3.05 g/W
1850 GF7040-3 4S 90 28.54 A 17027 1263.19 g 2.71 g/W
1850 GF7040-3 4S 100 35.09 A 17658 1384.39 g 2.43 g/W
1850 T-Motor T6143-3 4S 30 1.72 A 8214 155.32 g 5.39 g/W
1850 T-Motor T6143-3 4S 40 3.32 A 10414 268.51 g 4.83 g/W
1850 T-Motor T6143-3 4S 50 5.82 A 12673 424.93 g 4.37 g/W
1850 T-Motor T6143-3 4S 60 9.02 A 14731 582.62 g 3.87 g/W
1850 T-Motor T6143-3 4S 70 12.73 A 16457 739.23 g 3.5 g/W
1850 T-Motor T6143-3 4S 80 16.98 A 17963 893.59 g 3.19 g/W
1850 T-Motor T6143-3 4S 90 21.87 A 19394 1047.42 g 2.92 g/W
1850 T-Motor T6143-3 4S 100 27.69 A 20605 1192.77 g 2.64 g/W
1850 T-Motor T5143-3 5S 30 1.72 A 10508 176.84 g 4.87 g/W
1850 T-Motor T5143-3 5S 40 3.43 A 13695 312.55 g 4.33 g/W
1850 T-Motor T5143-3 5S 50 5.82 A 16524 472.04 g 3.86 g/W
1850 T-Motor T5143-3 5S 60 8.78 A 18985 624.7 g 3.4 g/W
1850 T-Motor T5143-3 5S 70 12.77 A 21493 815.36 g 3.06 g/W
1850 T-Motor T5143-3 5S 80 17.36 A 23644 992.0 g 2.75 g/W
1850 T-Motor T5143-3 5S 90 22.16 A 25396 1153.74 g 2.52 g/W
1850 T-Motor T5143-3 5S 100 28.29 A 27116 1330.36 g 2.29 g/W
1850 T-Motor T6143-3 5S 30 2.29 A 9761 235.22 g 4.91 g/W
1850 T-Motor T6143-3 5S 40 4.68 A 12575 414.9 g 4.25 g/W
1850 T-Motor T6143-3 5S 50 8.16 A 15152 627.73 g 3.69 g/W
1850 T-Motor T6143-3 5S 60 12.83 A 17233 811.23 g 3.05 g/W
1850 T-Motor T6143-3 5S 70 17.34 A 19048 1007.51 g 2.81 g/W
1850 T-Motor T6143-3 5S 80 22.9 A 20718 1211.66 g 2.58 g/W
1850 T-Motor T6143-3 5S 90 28.96 A 21934 1364.1 g 2.31 g/W
1850 T-Motor T6143-3 5S 100 36.1 A 23013 1511.72 g 2.06 g/W
1850 T-Motor T5143-3 6S 30 2.3 A 12370 256.33 g 4.42 g/W
1850 T-Motor T5143-3 6S 40 4.53 A 15953 438.83 g 3.85 g/W
1850 T-Motor T5143-3 6S 50 7.7 A 19210 639.18 g 3.3 g/W
1850 T-Motor T5143-3 6S 60 12.11 A 22050 870.18 g 2.87 g/W
1850 T-Motor T5143-3 6S 70 17.29 A 24636 1093.04 g 2.53 g/W
1850 T-Motor T5143-3 6S 80 22.82 A 26677 1278.38 g 2.25 g/W
1850 T-Motor T5143-3 6S 90 36.01 A 30171 1595.62 g 1.8 g/W
1850 T-Motor T5143-3 6S 100 47.02 A 30610 1912.61 g 1.6 g/W
1850 T-Motor T6143-3 6S 30 3.04 A 11322 341.6 g 4.47 g/W
1850 T-Motor T6143-3 6S 40 6.38 A 14672 581.43 g 3.63 g/W
1850 T-Motor T6143-3 6S 50 13.13 A 17007 809.11 g 2.47 g/W
1850 T-Motor T6143-3 6S 60 18.89 A 18996 993.79 g 2.12 g/W
1850 T-Motor T6143-3 6S 70 21.34 A 21068 1236.59 g 2.34 g/W
1850 T-Motor T6143-3 6S 80 28.37 A 22581 1463.84 g 2.09 g/W
1850 T-Motor T6143-3 6S 90 34.5 A 23358 1550.32 g 1.83 g/W
1850 T-Motor T6143-3 6S 100 41.6 A 23794 1627.58 g 1.6 g/W

Manufacturer bench figures (T-Motor bench, one 1850 KV winding over six runs: a Gemfan GF7040-3 and a T-Motor T6143-3 on 4S (~16.8 V), a T-Motor T5143-3 and a T6143-3 on 5S (~21 V), and the same two props again on 6S (~25 V); 8 throttle points (30-100% in 10% steps) on each run); real-world thrust varies with ESC, battery sag and prop condition.

Thrust-to-weight with this motor

RPM & prop speed on this motor

Props in this motor's class

PropSizeBladesWeight
Gemfan Hurricane LR 6026-2 6.0x2.6 2 3.0 g
Gemfan Freestyle 6030 6.0x3.0 3 4.45 g
HQProp 5.5X2.2X3 5.5x2.2 3 4.6 g
HQProp 5535 5.5x3.5x3 V2 5.5x3.5 3 4.6 g
HQProp 6x4.3x2 6.0x4.3 2 4.7 g

Where this data comes from

Bench rows, configuration and dimensions are from T-Motor's own "P2505 Product Drawing", "P2505 Specifications" and "P2505 Test Report" images on tmotorhobby.com/goods-1171.html, where the motor is sold as "P2505 1850KV Motor - Pale Rose" and RaceDayQuads sells it as Pacer 2505 - Pale Rose. Identity is the whole Specifications block, which RaceDayQuads reprints to the digit - eleven figures: 1850 KV, Φ30.4*28.8mm, 20#AWG 150mm leads, a 4mm shaft, 1.1 A idle current at 10 V, 1217 W Max. Power (60s), 31.25 g including cable, 69 mΩ, 12N14P, 4-6S rated voltage and 47 A Peak Current (60s) - so this is one winding on one page and kv_options did not move. The report is 48 rows in six runs of eight throttle points, 30-100% in 10% steps: a Gemfan GF7040-3 and a T-Motor T6143-3 on 4S (~16.8 V), a T5143-3 and a T6143-3 on 5S (~21 V), and the same two props again on 6S (~25 V). Max thrust is the T5143-3 6S 100% row, 1912.61 g, where the page carried none. The spec-block cross-check half-lands: the block's 47 A Peak Current is that same row's 47.02 A, but its 1217 W Max. Power sits above every power in its own table, whose largest is that row's 1192.22 W. All 48 rows reproduce the printed power column as voltage x current - the largest per-run mean implied offset is 0.003 A - and thrust / power is the printed efficiency on every one of them. All six runs were logged at 16 °C ambient, so the Operating Temperature column is comparable across the page (81, 77, 80, 85, 95 and 87 °C at 100% throttle). Three source facts recorded rather than repaired. First, the T5143-3 6S run's voltage rises at the top: 24.60 V at 90% and 25.36 V at 100%, the latter above its own 25.25 V at 30%, on rows whose power and efficiency follow their own columns exactly. Second, the T6143-3 6S run's current steps out at 60% - 13.13, 18.89 and 21.34 A at 50/60/70% - so its efficiency column is not monotone (2.47, 2.12, 2.34 g/W), again on internally consistent rows. Third, the Product Drawing calls out four M3 holes on a Ø16 bolt circle, so mount_mm stays empty for the fourteenth T-Motor page running, and it prints M5 on the prop end where the block and RaceDayQuads both say 4 mm, so shaft stays 4 mm.

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