Quote from Benjamin on 15th May 2025, 8:01 pm

Updated List for a (Large-Scale) Electric RC Sports Boat

1. Power System (Electric Drive)

• High-Power Brushless Motor
  • Example: Leopard 5692 1340KV or TP Power TP4070/TP5670.
  • Must be rated for 6S–12S LiPo and produce 4–6 kW power.
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• High-Current ESC
  • Example: Swordfish 300A HV, Flier 240A HV, or Seaking HV 130/180A.
  • Must support up to 12S LiPo (44.4V).
  • Water-cooled type is essential.
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• LiPo Batteries
  • Configuration: 2x 6S 5000–8000mAh in parallel or series.
  • Choose high-discharge rate (≥ 50C) to handle power draw.
  • Use hard case LiPos for safety and durability.
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2. Drivetrain Components

• Heavy-Duty Flex Shaft Drive System
  • Suitable for high RPM and torque.
  • Diameter: 6mm or more, depending on motor output.
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• Stuffing Tube + Teflon Liner
  • Properly aligned and greased to reduce drag and wear.
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• Thrust Bearing Assembly
  • Required to absorb axial load from large props.
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• Collet-Style Coupler
  • For 8mm or 10mm motor shafts.
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• Metal Propeller
  • Example: Octura X-series, size: 50–65 mm, pitch matched to motor RPM.
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• Adjustable Strut and Rudder System
  • CNC machined aluminum for durability.
  • Often includes integrated water pickups.
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3. Control System

• High-End 2.4GHz Transmitter + Receiver
  • At least 4 channels, for throttle, rudder, and extras (like telemetry or trim).
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• Large Torque Waterproof Servo
  • Example: Savox SW-1210SG, ≥ 20 kg/cm torque.
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4. Cooling System

• Dual Water Pickups
  • One for motor, one for ESC. Optional: third for rudder cooling.
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• Silicone Tubing (4–6 mm ID)
• Water Cooling Jackets
  • Fitted to both motor and ESC. Ensure good contact for heat transfer.
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5. Mounting and Hull Setup

• Motor Mount
  • Heavy-duty aluminum mount with vibration dampening.
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• Battery Mounts
  • Secure with Velcro straps and foam padding.
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• ESC Cooling Plate or Bracket
• Hatch System
  • Use a sealed canopy hatch or tape + latch combo to ensure watertightness.
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6. Additional Essentials

• Marine Grease for shaft maintenance
• Battery Charger (multi-bank) capable of charging 6S+ LiPos
• Failsafe setup to stop motor on signal loss
• Cooling water filter (optional but smart)
• Balance connector extensions for LiPo balance charging
• Power meter or watt meter to monitor current draw during testing

Optional Add-ons

• Telemetry system for RPM, temps, voltage
• Onboard GPS for speed tracking
• Kill switch or arming plug for safety

Does this answer your question? 

Quote from Timothy Wojnowiak on 4th September 2025, 12:32 am

Great info for my build  thanks. Tim