A pattern of dyke, level and drain on Halvergate Marshes

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Take the train  from Norwich to Yarmouth and, as the railcar rattles its way from Acle towards the sea you pass along flatlands dotted with windmills, this is a windy place and the little train often rocks with the gust … Continue reading

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More thought on a kite stability index

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Paul Chapman pointed out the definitive text on kite stability theory is by CF Marvin, his book The Mechanics and Equilibrium of Kites  published in 1898. As a begining I suggest ‘Marvin’ as the unit of kite stability. Paul suggests … Continue reading

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A kite stability index curve

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In Damian Sailors paper this graph is used to compare kite aspect ratio with stability and wind speed:It’s quite a confusing graph to read as it seems to have 3 axes: stability, aspect ratio and wind speed. The 2 kites … Continue reading

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Some thoughts on a kite stability index

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The impact of a tail on the stability of the DL Trooper is something of a revelation to me- a simple thing can turn an unstable low AoA kite into a steady lifter albeit with decreased lift. Kite stability is … Continue reading

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Mappa by Wislawa Szymborska

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Flat as the table it’s placed upon. Nothing moves beneath it and it seeks no outlet. Above – my human breath creates no stirring air and leaves its total surface undisturbed. Its plains, valleys are always green, uplands, mountains are … Continue reading

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Photoscale and ground cover

If you need to know what the ground cover for a given camera at a given height will be the photoscale formula will do this for a true nadir shot of a level surface. Photoscale=f/h where f= focal length of … Continue reading

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WWKW 2015

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Pressure..too much pressure! World Wide Kite Aerial Photography Week (WWKW) is the all too short week the worldwide KAP community make an effort to fly, mostly for fun. The idea is simple. We submit our photos and we can share … Continue reading

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AutoKAP ‘A5′ rig shakedown

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This is my 3rd one of these, and I have been flying it and tweaking it for a while now. It is built to fit in an A5 box for transport. The pan gear uses recycled printer cartridge parts driven … Continue reading

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Bft 5 fly off.

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The beefy westerlies have kept up this week so I have been able to to to grips with Bft 5  (19-24mph) and see how 2 ‘high speed’ KAP contenders fare. To get an idea of the comparative performance of the … Continue reading

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KAP in Bft 5

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One look at the forecast today was enough…Gale force is not KAP force at all! Opinion on the Trooper confirms it needs a tail when flown in turbulent (squirelly) flow, and is tricky to handle on a short line. The … Continue reading

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