Comparison of the traction force of a static parachute kite and a crosswind kite, both with the same projected surface

[PierreB]

Hi Doug,

I have to say that after my own experiences related above, I am less curious to know whether the figure 15 prevails (which I think), or if it is the curve with the reference height of wind speed at 200 m on the video, and this is all the more so since another example that I have already mentioned also provides a reference for wind speed a few meters above the ground for performances comparable to those indicated in Figure 15, all else being equal.

@PierreB

@PierreB

On the first paper: Table 8 page 44, dataset 5: Mutiny (25 m² kite, see page 8), 8 m/s wind speed, 5.19 kW average power, 14.1 kW average generation phase.

On the second paper: Figure 15 (average power 92 kW, with peaks of 300-400 kW.

The wind speed was measured a few meters above the ground, and the flights were carried out at several hundred meters altitude, if I was not mistaken in reading both documents.

The wind must therefore be much stronger at the height of the kite, which would considerably reduce the real efficiency such as measured with a wind speed close to the ground.