eCalc xcopterCalc settings for IRIS and IRIS+

eCalc xcopterCalc is a great online Multicoper Calculator, which supports you in choosing an adequate motor setup – along with propellers and ESC – for your electric RC Multicopter.

Even though both IRIS and IRIS+ come as an Ready-To-Fly model, it is a good idea to make regular use of eCalc xcopterCalc. This would e.g. be the case for:

  • Determine what effect additional weight will have on your quadcopter’s hover throttle (lift performance) and flight time.
  • What will happen if you change the propeller against another model.
  • When flying at different flying fields with varying altitude and/or air temperature.

With all these questions eCalc xcopterCalc can help you.

But one of the challenges is to find the correct component data for using eCalc with your specific quadcopter. Therefore here the data for the 3DR IRIS and IRIS+.

3DR IRIS

  • General
    • Motor Cooling: Poor
    • # of Rotors: 4
    • Model Weight: 1692g (incl. Drive)
  • Battery Cell
    • Type: custom – normal
    • Configuration: 3S1P
    • Cell Capacity: 3600 mAh
    • Total Capacity: 3600 mAh
    • Resistance: 0.0068 Ohm
    • Voltage: 3.7V
  • Controller
    • Type: Max 20A
  • Motor
    • Manufacturer: RCTimer
    • Type: A2830-12 (850kV)
  • Propeller
    • Type: APC SlowFly SF
    • Diameter: 10
    • Pitch: 4.7
    • # Blades: 2

You can use this direct link to xcopterCalc with the filled in values (See Figure 1).

Figure 1: xCopterCalc settings for IRIS

Figure 1: xCopterCalc settings for IRIS

3DR IRIS+

  • General
    • Motor Cooling: Poor
    • # of Rotors: 4
    • Model Weight: 1580g (incl. Drive)
  • Battery Cell
    • Type: custom – normal
    • Configuration: 3S1P
    • Cell Capacity: 5200 mAh
    • Total Capacity: 5200 mAh
    • Resistance: 0.0068 Ohm
    • Voltage: 3.7V
  • Controller
    • Type: Max 20A
  • Motor
    • Manufacturer: Tiger Motor
    • Type: Air Gear 350 (920)
    • KV: 920 rpm/V
    • no-load current: 0.5A @ 10V
    • Limit: 230W
    • Resistance: 0.132 Ohm
    • #mag. Poles: 14
  • Propeller
    • Type: custom
    • Diameter: 9.5
    • Pitch: 4.5
    • # Blades: 2
    • PConst: 1.00

You can use this direct link to xcopterCalc with the filled in values (See Figure 2).

Figure 2: xCopterCalc settings for IRIS+

These are the settings that I have been using very successfully. Calculated results usually match tested results quite well.