Mini USB connector for CHDK

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There is plenty out there on this but Tom Benedict asked for info on how the wiring works on this so here is how I did one. The advantage of this method is the size and weight reduction over the … Continue reading

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The Fens by John Clare

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Wandering by the river’s edge, I love to rustle through the sedge And through the woods of reed to tear Almost as high as bushes are. Yet, turning quick with shudder chill, As danger ever does from ill, Fear’s moment … Continue reading

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At Denver complex

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I flew Filalu at Denver sluice. The flow, as ever over the fen, was laminar, mercifully light at a max of  7mph with occasional lulls. I opted for the 9′ delta as I feared even a small rise in wind-speed … Continue reading

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Filalu with tuned wire

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Advice from Simon Harbord prompted an investigation into the length of the wire to get wobble down and this paid off..a little. The length of the wire is definitely significant in damping oscillation but the difference, although noticeable,  is not … Continue reading

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A simple suspension

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I have been using the same pendulum for a good while now because it works,  shows no sign of adverse wear, is hard to break and easy to get on and off the line. From time to time I use … Continue reading

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Printer cartridge gears take to the air

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The 19tooth gear sits nicely on a Towerpro MG90S spline with an m3 bolt. This is a 90 degree servo so it only served as dummy to get the mounting plate cut to size and test the alignment while I … Continue reading

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Printer cartridge pan gear

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A while a go inventive Italian Kapper ‘SMAC’  posted that spent laser printer toner cartridges have some really useful components inside. My magenta cartridge failed the other day and, after the pain of paying HP for a replacement, I decided … Continue reading

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Kite aerial photogrammetry: 4 infill points & break-lines

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Hunting the edges. Ideally break lines should be digitised off the surface mesh but for speed these lines are traced of the ortho-photo as polylines then matched to the required z value before reducing them to plain 2d lines and … Continue reading

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Kite aerial photogrammetry: 3 developing the contour model.

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Point density. Digitising points off the mesh reveals the structure of the earthwork, the point density is approximately at .2m post spacing increasing to 0.1m at detail areas. A test patch at 0.05m did nothing to improve the model. As … Continue reading

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Kite aerial photogrammetry: 2 the DSM

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1st effort. The surface generated from the Sept 2014 block produced a very irregular model, I had hoped contouring would improve the interpretation of the earthwork but it did not. The contour model was horrible, even after taking out the … Continue reading

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