Latest from eMotres

Two coaxial motors, or one bigger prop? The payoff is flight time

A common heavy-lift setup: a coaxial pair of T-Motor V3115 on 10″ props — 600 W of shaft power. But coaxial props fight for the same air — the lower one loses ~20 % of its efficiency in the wake of the upper.

Our proposal: replace them with one CIANO14 40_12 on a 12″ prop, tuned to the same thrust. On AeroStator Core™ technology. Same thrust (~2,865 g), same battery:

The catch: the single 12″ prop runs at ~2× the torque — where our flat-wire winding earns its place, holding high torque at high efficiency without overheating.

These figures are an estimate — the 12″ operating point is modeled from our measured 10″ data. Bench validation on 12″ is next, and we’ll publish the numbers. AeroStator Core™ is open for licensing and co-manufacturing partners.

84.2 % system efficiency on FOC — the CIANO14 40_12 completes its sinusoidal round

We just finished the FOC round on the CIANO14 40_12 — our 125-gram 3115-class inrunner, built on AeroStator Core™. Peak system efficiency (controller + motor, measured at the bus) reached 84.2 %, holding an 82–84 % plateau across the working range. For comparison, our earlier run on a trapezoidal BLDC controller peaked at 76.9 %.

Why it matters: a standard 3115 motor tops out around 300–350 W continuous. This one sustains 6 kW/kg — more than 2× the continuous power of any 3115-class motor we’ve benchmarked against. Same form factor, double the sustained output. In UAV propulsion, every single watt-hour saved is extra payload and flight time.

6 kW/kg continuous — the CIANO14 40_12 runs 30 minutes straight

We ran the CIANO14 40_12 on a propeller test stand for 30 minutes straight — roughly double the sustained power of any 3115-class motor on the market. Here’s what the stand logged at minute 29 (125 g motor):

A standard 3115 tops out at 300–350 W continuous before hitting thermal limits. Same form factor — twice the sustained power. The winding stays within its 200 °C insulation limit throughout.

An inrunner that beats the class-leading outrunner

First bench tests of the CIANO14 40_12, built on AeroStator Core™, challenge a basic assumption in this class. Conventional wisdom says outrunners own drone propulsion on efficiency and thrust density — our first data says otherwise.

Benchmarked on the same propeller and the same 24 V against the class-leading T-Motor V3115 outrunner:

And these are trapezoidal BLDC results — we haven’t switched to FOC yet, so there’s clear room to grow. Next: a controller integrated directly into the motor, 0.15 mm laminations, and foil (flat) coils.

First test results — the 150_30 reaches 50 kg continuous thrust

The first drone-propulsion motor built on AeroStator Core™ completed its initial bench tests on a thrust stand. At 50 kg continuous thrust (56″ propeller, BLDC controller):

The AeroStator Core™ architecture turns the stator yoke into an active cooling structure — enabling tangential polarization with standard F45SH magnets at performance levels that usually demand much heavier or more expensive cooling. The roadmap: 60 kg continuous thrust at the same 3 kg, via FOC integration, 28- vs 42-pole analysis, and 63″ propeller tests.