Tag Archives: Kites

Stock /Becotised ITW Ultrafoil 15 fly off

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I have the loan of an un-modified ‘stock’ Ufoil15. Here it is flying alongside the Becotised version. The lateral movement of the stock kite is clearly visible as is the effect of the modified kite. Lighting conditions were poor but … Continue reading

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Becotised Ultrafoil 15. Good kite, happy man.

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The last one of these I did was for the HQ Flowform2.0 which uses a much heavier grade of fabric. For the Ufoil which I think is 31g/m Icarex I used a No.60 needle and a fine  polyester thread. Tulle … Continue reading

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Ultrafoil 15 mods for stability part 3

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Into the Wind, suppliers of the Ultrafoil describe the kite thus: “ITW UltraFoil 15 Kite Ray and Jeanne Merry update the Flowform With its uniquely vented design, the UltraFoil 15 has a very wide wind range. In light winds, its … Continue reading

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Ultrafoil 15 mods for stability part 2

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It occurred to me Ray Merry has a design signature: the meshed slot is a nice detail on the original Flexifoil and he has used a similar feature on the Ultrafoil. It’s a neat way of getting air into the … Continue reading

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Ultrafoil 15 mods for stability part 1

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Shortening the middle bridle line had an adverse effect on the stability of the Ufoil. it actually made things worse.  A short discussion with Ivo van Olmen pointed towards excessive internal pressure so I decided to vent the crazy weaving … Continue reading

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Ultrafoil 15 Bft 5 stabilty

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Update. Ultrafoil 15 crash. My confidence in the Ultrafoil has been building and I think I have found it’s upper wind speed limit. It does well at the lower end of Bft 4  but can be a real handful as … Continue reading

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ITW Ultrafoil 15

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I saw this in use by Randy Anglin and promised myself I’d try one out when the oportunity arose. In prep for the OWLP workshop (which is stalled by rain again) I made a visit to my favorite kite store: … Continue reading

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Kites radio…& KAP

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As prep for this years Royston Kite Festival I have been asked to provide an information panel to explain the pile of wires and string we will present to the public on the day. Last time we did this we … Continue reading

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This nadir shot was taken as the kite over flew its own line…. Camera flight time 15mins 236 exposures captured. Shot interval :5s Path: clickPanPro ‘A’ Canon S95 Exposure: CHDK KAP UAV 3.5 Shutter release: USB one shot Tgt Tv: … 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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