Michel Jullian wrote: > > Harry wrote: > >>> 100 kg thrust, 1 m gap, 0.9 kV/mm > ... >> Is this correct? >> >> power consumption 9 kW >> area 3.1 m^2 >> wire spacing 1.3m > > Only the wire spacing is correct, check your power and area calculations.
power consumption 90 kW area 310 m^2 Harry >> Suggestions: >> Rephrase the scaling rules to read: >> >> "The W per g are proportional to the kV/mm, whereas the m^2 per g are >> proportional to the inverse square of the kV/mm." >> >> I would also explicitly show the mass in the calculation >> of the area in the example section. > > Thanks for the improvements, revised version: > ********************************************* > MULTIWIRE-PLANE LIFTER/IONOCRAFT DESIGN GUIDE: > -------- > Reference design: At 1 kV/mm (the max we can do without arcing) the power > consumption is 2 W per "gram" of thrust, and the required area is 0.0025 m^2 > per g. > > Scaling rules: The W per g are proportional to the kV/mm, whereas the m^2 per > g are proportional to the inverse square of the kV/mm. > > Wire: as thin as possible (0.1mm OK in most cases), wire-wire spacing = 1.3 > times the gap length d (optimum value) > > EXAMPLE: > --------------- > We want to lift 50 g, and we choose a v/d of half the max value i.e. 0.5 > kV/mm, namely v=25kV for a d=50mm gap, to save on power consumption (our color > monitor is only 75W) > > 1/ Required power per g: 2 W * 0.5 = 1 W -> Power consumption for 50 g = 50 W > 2/ Required area per g: 0.0025 m^2 / 0.5^2 = 0.01 m^2 -> Area for 50 g = 0.50 > m^2 > 3/ Wire-wire spacing: 1.3*50 mm = 65mm > > ********************************************* > -- > Michel > > > >
