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The Model
Part 1 - Chassis
Part 2 - Tail
Part 3 - U/Carriage
Part 4 - Servos
Part 5 - Electrics
Part 6 - Canopy
Part 7 - Flight Trials
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Hornet Version
 
        

 

Scratch Built Collective Pitch 3D Pro Hybrid

Part 5 - Electrics

For this Helicopter I have used the following electrical components -

  • Futaba GY401 Heading Hold Gyro
  • 4 Hitec HS55 Servos on Cyclic
  • 1 Ashtek Digital Servo on Tail
  • Century 6Ch receiver
  • 35A Pheonix Brushless Sensorless ESC for Main motor (BEC not Used)
  • ParkBEC 1.5A BEC
  • JustGoFly 400DH Brushless Motor
  • ThunderPower 2000mAh Lithium Polymer Battery
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The bottom plate is designed to take both the main ESC and the seperate BEC circuit

I used thick double sided tape to act as an insulator from the carbon and held them securely with a tie wrap.

This way the ESC is kept cool, away from the receiver and has the shortest load wires possible to the motor.

 
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The Gyro is positioned at the rear of the main chassis horizontal member.

 
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With the receiver in place at the front of the main chassis member I wired everything up in aaccordance withe the diagram above and fired up the electronics.

Everythign worked as it should but it was obvious that tidying had to be done!

 
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I started from the rear using a product called Flexo PET braiding (purple to match the colour scheme) finishing off with heatshrink.

The wires running between the servo to the Gyro and through to the receiver where shortened to save as much weight as possible.

 
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Here you can see the 1.5A BEC fitting on top and at the rear of the electronics plate, the cables run underneath the 35A ESC and up to the receiver keeping the sides of the Heli as neat as possible.

 
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I used a simple MAP Micro Antenna which is mounted on the left skid, note how the cable is again protected by braiding and is routed not to touch any of the Carbon.

 
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I housed the receiver in a small project box mostly for neatness but also for protection from glitching via the carbon.

All cables where directly soldered to the receiver PCB.

 
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Finally I wired the servos keeping the cables as short as possible.

 
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