TWiT Throwback (Audio)

Know How... 162: Beer Lifting Drone and Interdrone 2015

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How to build a beer lifting quad, and Interdrone 2015.

The Beerlifter

Parts List

  1. 2 x Diatone 250 Frames (16.99 each... AND they come with the Spacers!) $33.98
  2. 8 x RTFQ 2208 2300KV motors ($61 for 4) $122.00
  3. 8 x RTFQ 20Amp ESCs ($9.00 each) $72.00
  4. 1 x KK 2.1.5 FC $19.00
  5. 1 x 45mm Power Distribution Board $1.99
  6. 2 x XT60 Connectors $1.50
  7. 40 x 2mm Bullet Connectors $10.02
  8. RTFQ 1-17v adjustable Voltage Regulator $0.99
  9. 16/18/20 AWG Silicone Wire $1.39
  10. Heat Shrink Tubing $1.00
  11. Carbon Composit Bullnose Prop (3.24 for 2) $12.69

    12. Total: $276.56

    Practical Design Considerations

    1. ESCs

    We've got 8 x RTFQ 2208 2300KV motors that max out at 295 watts

    • We're going to use a 4s (14.8 volt) battery.
    • Watts = Volts * Amps - So we'll be using (295/14.8) amps = 19.9 amps

      • So we need 20 Amps ESCs (with sustainable bursting to 30 amp, for good measure)

      2. Batteries

      Again: 8 x RTFQ 2208 2300KV motors that max out at 295 watts

      • That means we can pull a maximum of 2,360 watts from the power system.
      • A single 2200 4s 60c battery can provide 1953.6 watts. (60c x 2.2 amps = 132 amps // 132 amps * 14.8v = 1953.6)

        • This means that we can't provide enough power with that single battery to max out our motors.

        We COULD go with a larger capacity battery, or a higher discharge rated battery

        But I decided to double up on the 4s 2200 60C packs. That gives us 3,907.2 Watts

        Hosts: Fr. Robert Ballecer, SJ and Bryan Burnett

        Connect with us!

        • Don't forget to check out our large library of projects at https://twit.tv/shows/know-how.
        • Tweet at us at @PadreSJ, @Cranky_Hippo, and @Anelf3

          • Sponsors:

          • SmartThings.com/KnowHow - promo code: KNOWHOW
          • Ring.com/KNOWHOW

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