Blitz Pro 2306 Brushless Gearmotor 5.2:1

Features

• Drive that survives: Single-stage 5.2:1 gearbox resists shock loads better than multi-stage designs.
• Low-KV control: Custom 2306 650KV stator tuned for smooth launches and confident handling.
• Efficient brushless power: Runs cooler with lower current draw than brushed drive setups.
• Quasi-direct-drive behavior: Back-drivable drivetrain reduces internal torque spikes after hits.
• Arena-grade construction: Hardened Mod0.4 steel gears, billet 6mm D-shaft, dual ball-bearing support.
• Voltage flexibility: Optimized for 3S–6S beetleweight drive without thermal sag.
• Compact package: 24mm gearbox, 37mm overall length from mount face to motor rear.
• Builder-designed: Developed by competitor/engineer Seth Schaffer and tested in competition.

Recommendation: If mounting wheels directly to the shaft,  the designer recommends that you trim the shaft flush with the hubs to reduce side-impact risk. This is optional but can significantly reduce damage; less necessary when wheel guards are used.

Recommendation: If mounting wheels directly to the shaft,  the designer recommends that you trim the shaft flush with the hubs to reduce side-impact risk. This is optional but can significantly reduce damage; less necessary when wheel guards are used.

See a nifty comparison chart for Just Cuz Dartbox Drive Motor models here:

Test Data (Preliminary)

Measured on a Prony-brake dyno. Results vary with ESC firmware/settings and protection modes. Values below are for apples-to-apples comparison, not guaranteed performance in every build.

• Method: Prony-brake dyno; ESC stall protection on, stuck-rotor protection off.
• Peak torque (27:1 gearbox): 2.7Nm @12V, 3.2Nm @16V (motor-only ~101–120mNm).
• Equivalent torque (5.2:1): ~0.52Nm @12V, ~0.62Nm @16V (not at 0RPM; effective “stall” will be higher vs brushed specs).
• Efficiency through 27:1: 73.5% @12V, 75% @16V, 68.2% @24V.
• Peak output power: 71W @24V (43% efficiency), motor ~7100RPM, ~91mNm.
• Peak input current (example setup): ~8.75A @3S, ~14.5A @6S (highly ESC-dependent).
• Phase resistance: 0.619Ω.

How To Use These Results

• Drive expectations (5.2:1): Roughly Viper 22:1 torque on 3S and Dragon 22:1–like torque on 6S, with brushless efficiency and better impact survivability.
• Voltage tradeoff: Higher voltage → higher top speed and mid-range power; lower voltage → finer low-speed control.
• Back-driven behavior: Single-stage design reduces internal shock loads; wheel hits transmit less destructive torque into the gearbox.

ESC Notes (Relevant To Test Data)

• Firmware: AM32 recommended; tested units shipped with V2.16. V2.18 adds PWM-by-RPM mode that can improve symmetrical startup.
• KV setting: Match ~650kV on 6S; use ~325kV on 3S. Fine-tune start power/initial RPM if launch feels inconsistent.
• Braking: Adjust to driver preference; braking level and timing affect heat and “drive feel.”

Is the Blitz Pro 2306 5.2:1 intended for drive?

Yes. The 5.2:1 configuration is optimized for beetleweight drive systems, providing high speed, brushless efficiency, and improved impact durability through a single-stage reduction.

How does this compare to common brushed drive motors?

Expect similar torque to brushed gearmotors that builders are used to, but with smoother throttle control, higher efficiency, and much better survivability under repeated impact shock.

What voltage should I use?

The motor supports 3S–6S (11.1V–22.2V). Higher voltage increases speed and power; lower voltage favors fine low-speed control. Many competitive builds run 4S or 6S depending on arena size and drive preference.

Should I trim the output shaft?

Trimming is optional. If wheels are mounted directly and exposed, trimming the shaft flush reduces risk from side hits. If wheel guards are used, trimming may not be as necessary.

What wheels or hubs work best?

Use robust 6mm bore clamping hubs or 6mm hex hubs designed for combat. Apply threadlocker to hub fasteners and don’t leave the shaft exposed as an impact target.

Does the Blitz Pro run hot?

The single-stage gearbox and low-KV motor are highly efficient. These motors typically run cool under normal driving. Excessive braking levels or extended stalls can introduce heat.

How does performance scale with voltage?

On 3S, torque and control feel are similar to Viper 22:1 brushed gearmotors. On 6S, expect performance comparable to Dragon 22:1 brushed gearmotors, but with better efficiency, quicker recovery, and reduced thermal load.

Why does the single-stage design matter?

With fewer reduction stages, there are fewer points of failure and less reflected shock during impacts. The drivetrain is more back-drivable, which reduces internal stress and helps the motor survive weapon hits that would damage multi-stage gearboxes.

What does “quasi-direct-drive feel” mean?

The wheel can rotate slightly under external force without binding the gearbox. This reduces torque spikes when your bot is body-slammed, pinned, or absorbing spinning weapon hits.

Do I need sensored ESCs?

No. The system runs sensorless. Consistent starts depend on correct AM32 tuning, not sensors.

How should I set the kV value in AM32?

Match the motor’s ~650kV on 6S. On 3S, set ~half (~325kV). This balances startup torque against drive smoothness.

Where can I find the tuning chart?

A recommended startup tuning chart and example drive settings will appear here once we finalize presentation format.

<!– ESC Tuning Chart Image Placeholder –>

How was the motor tested?

Performance figures are based on Prony-brake dyno measurements and are intended as apples-to-apples comparisons across motors, not absolute stall torque guarantees at zero RPM.

Can I replace individual components?

Replacement shafts and bare Blitz Pro gearboxes are available. Replacement motors are planned and may vary in availability.