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T-Motor F40v2 2500kv Full Results  [CLICK HERE]

  

This is the high KV sibling of the F40v2 2300kv motor.  Thanks to T-Motor for sending this one over to test.

I've had a number of Tiger motors here on the bench, and they never dissappoint in terms of build quality.  This highKV variant of the F40v2 is the same expected quality and has all the same build charactersitics of the lower KV version. My only real complaint is that it continues to use the sticker label on the motor instead of laser etching, but that is easily remedied by simply peeling the sticker off. Also this motor weighs in at 30g, which may take it out of the running for those looking for a light weight build. Other than that machinging is excellent and tolerances are tight, and overall it is a very nice feeling motor.

Results

Where the F40 series seems to excell is more in efficiency than power, and the 2500kv continues that trend.  It manages similar thrust and similar current draw with 5x4x3 props to many of the 2300kv motors pushing 6x4 King Kong props.  It is still shy of 1200g even on the 5x4x3, which for the high KV motors is not amazing, but it pulls only 27A, which is very manageable.  Across most of the props this motor pulls an average of a couple of amps less than many of the motors at full throttle.  What is interesting, though, is that at equivalent thrust the amp draw is almost identical to the more powerful motors in the 2205 high KV class.  Depending on your crusing habits and AUW you may or may not see efficiency gains, but if you're riding WOT or spending a lot of time in the upper register of the throttle, you'll definitely see a reduction in overall consumption, though with an accompanying reduction in output. Also it is worth noting that the N45SH magnets and higher KV will combine to make a slower reacting motor, especially on the heavier 5" props, so if you're looking for a snappy response, these motors may not be a first choice. As with the other F40v2 though, this is an extremely smooth motor, and build quality and reliability may make up for the other performance differences for some.