Freesteel Blog » 2017 » August

Monday, August 28th, 2017 at 4:44 pm - - Hang-glide

Not been getting very many things to conclusion recently. Sitting around in campsites waiting for people to finish caving. Sitting at home waiting for people to come home from caving. Things have been in stasis. And my flying has been somewhat less than epic.

I have been breaking quite a few less bits of glider lately, which is a surprise given the sort of place I chose to park it yesterday.

I came round the tree behind the nose of the glider and landed up the slope that I didn’t know was going to be there when I chose this field. If I had aimed any further along the field I’d have gone over the hump and then I don’t know what I’d do on the downslope except crash into a hedge.

It was a close enough landing that I was able to walk back to the top of the hill in an hour and a half. Here is the track drawn over the terrain:


And this is the altitude trace where I managed to circle for a time less than 200m above the ground in air that was rising not quite fast enough to keep me from going down.

These diagrams were made in an ipython notebook.

Flying in weak air is a new capability. After the debacle of my previous XC flight on a day when somebody else flew 200kms from Long Mynd to Cambridge, I went back to school and watched some videos which explained how I had to set up my vario so that it makes sounds when it is going down as well as going up, so that I can tell the difference at different rates of going down without having to glance at the number.

I’m also trying to learn now to work OpenFoam, as well as learn some Aerodynamics. And now I’ve got to read a dissertaion on bicycles which involved sensors and a kinematic model of a bike on a treadmill, as this represents ten years of research in the area beyond where I am at with my glider sensors.

This is actual aggregating technical progress, not the latest forgettable choss on spacebook. I just cannot keep up!