So, you have selected the Tinkerer Series of emails. They'll arrive in due course, but meanwhile... Here's a short selection of Flight Reports which illustrate a few things that I got up to, with single-line kites.
Read up and see if there's anything you'd like to try for yourself :-)
One of the Ideas in my weekly email Tips-n-Ideas
Series is dropping small parachutes from a kite line. This idea was
inspired by a site visitor who contributed a story to the site about
how his family used to send small parachutes up a kite line and then
flick them off.
Having thought more about it and having done some
tests earlier today, I have reformulated the idea so more people can
have success with it. For one thing, everything has to be just right
for a small parachute on a hook to slide most of the way up a kite
line. With the new idea, the parachute is secured in a very simple
fashion to the line near the kite, and then flown up with the kite
and flicked off later.
The breeze near the coast was gusting to the high 20's in kph. Perfect for the Soft Sled. At 60cm tall, the kite was somewhat smaller than ideal for launching a 30cm diameter parachute with 15g weight underneath. But the little kite was pulling strongly in the top half of it's wind range today - there were no problems at all!
The first drop was made from some 10m (30 feet) or so from the kite, on a fairly short line. Just to see if the idea worked. It took a few pings, but work it did! Down floated the 'chute, gyrating slowly as it spiraled down to the grass.
Another flight was made, this time on 60m (200 ft) of line. In addition, the chute was suspended right near the bridle knot of the kite. Launching was a little tricky, but soon a gust came through and powered the Soft Sled right up to a 50 degree line angle. Again, generous amounts of shaking and flicking dislodged the 'chute and down it came as before.
After yet another flight up on the longer line length and another successful parachute descent, the concept was considered sound. Sound enough to publish, replacing my earlier article which ... tsk tsk tsk ... was largely untested.
A few more minutes were spent on the field, flying the Sled right out to 90m (300ft) of line. The kite flew straight and true despite earlier signs that it needed a bit of a tweak, a few days ago. A quirk of soft kites perhaps. Or maybe just because this one is plastic and packing tape, with storage creases making a small difference.
;-) For those unfamiliar, a drogue is a windsock-like device that can
be used as a stabilizer for kites. Like a long tail commonly does...
It's Kite Festival time again, here in Adelaide, South Australia. Once again I hope to put up a moderately long train of Diamonds. From previous experience, long plastic tails tend to get wrapped around the flying line. Particularly when the wind speed drops off and the train assumes a shallow angle.
Over the last few years, attempts have been made to minimize the tail-tangling problem. This year a swap to drogues will be tried. In theory, there should be almost no contact between drogue and line. Maybe the occasional bump-and-slide. This is because the drogue plus bridle lines combination is relatively short compared to the amount of tail that used to be required.
So today was a try-out with 3 different sized plastic drogues that were whipped up just yesterday. Out at the field, the breeze was only gusting to around 20kph. But even so it would provide a fair indication of how effective the drogues would be. Just on one kite, for speed and simplicity.
The first drogue tied on was the middle size. 120cm circumference at the front and 50cm long. Rather big for a 1m tall Diamond? Well, this particular kite always needed plenty of tail, being much like a fighter kite in outline. Somewhat to my surprise, the drogue seemed quite a bit too big. The kite tended to pitch down when the drogue caught a bit of extra pressure. Also, the kite struggled to climb far in the light breeze.
Changing to the smallest drogue of the 3, I tried again. This time the kite did better, but still seemed to lack it's usual climbing ability. And then came an idea... Fishing around in my kite gear bag, I soon found an older drogue that was even smaller than the one currently on the kite...
Soon the Diamond was away. Up and up it went, the old drogue looking very fine in proportion. As well as providing completely adequate stability. Great! That'll do. The largest recently-made drogue didn't get a look-in.
Now to create a template to make up 8 or so new drogues. Plus another template with dimensions 20% smaller, which should be sufficient in light winds.
Hopefully wasted time at the Festival will be minimized. Flying time maximized. No wrap-around messes this time!
suitable for rather light-pulling kites such as those from the MBK
Paper Series ;-)
With gusts disturbing the foliage outside it seemed an opportune time to take out the Paper Sode #3. I chose the big square Knox Park this time since it would be good to get plenty of thread out regardless of the wind's direction.
While waiting at a red light, I noticed large trees being fanned from the East. OK, so it would mean a bit of walking... The car-park being in the North-West corner of the reserve.
An initial flight was promising, with the new spar design holding up well to the boisterous gusts. However, despite good height being achieved, the little Sode was soon back on the deck.
Thermal activity! Paper kites are not very tolerant of lulls since they descend fast when the breeze is just a few kph below the required minimum. Only seconds are available to catch the next gust.
In an effort to get a longer flight, I launched again and backed away upwind, letting out thread as I went. So far so good, as the tiny Sode rode the Gentle-to-Moderate strength breeze.
Rising air gave the kite a further boost for half a minute or so. Now there was so much thread out that line-sag was becoming apparent. With polyester sewing thread!
Having left my bag behind on the dry grass, I needed to find some way of anchoring the kite for a while. Aha! A dry weed, the kind which often presented problems with catching the thread, now became a possible anchor point. After a little fiddling, the thread was secured around the base of the weed. And it did a great job, holding the kite until it came down a few minutes later.
Lulls between thermals were shooting the Sode down every few minutes, so I had one last go. This turned out to be a log-able 5 minute flight on the full 70 or 80 meters of thread. And the anchor point? A handy large crack in the parched soil, down which I had stuffed the paper winder. So there's number 2. Another way to anchor a small kite!
With the wife busy at the nearby supermarket,
there was a small window for some kite flying and KAP. We had both
been sick pretty much all week - having survived the entire Winter
unscathed up until then.
The 2 meter (8ft) span carbon and
Tyvek Diamond went together fairly quickly and even the KAP rig setup
seemed to be getting easier. Must be the practice! A
Half-Picavet suspension seemed perfectly adequate since the big
super-rigid Diamond has almost zero side-to-side sway in
Winds today were almost too light, but the Diamond got away successfully, out to just over 60 meters (200 feet) of line. The camera was hanging just 15m (50ft) from the kite this time, rather than the usual 30m (100ft). No problems ensued, despite the uneven wind speed and gentle thermal gusts. Nice! We'll be getting slightly higher KAP shots from now on, while keeping the kite altitude legal.
ISO was set to auto, over the range 125 - 200. EV was left on 0.0 for the first flight. Although the camera never got much higher than 150 feet off the grass, some of the photos just caught a glimpse of the sea, several kilometers away.
Unfortunately, there was a delay of quite a few minutes in getting the rig in the air for a second photo session. Hence no usable photos were obtained, which had been set to -1.0 EV for comparison with the first lot. There were plenty of nice close-ups of grass growing though ;-) The wind had died to almost nothing in between the small thermals which lofted the occasional butterfly up towards the kite.
At least something made it into the air this week. Better than nothing!
This outing was a little nerve-wracking, since
dark low clouds were going over, with the threat of strong wind gusts
associated with them. At least I had detected no lightning strikes on
the weather radar, which shows strikes during the past 30 minutes.
Perhaps fortunately, the Fresh Wind Barn Door kite had go back in the car after I discovered that one of the sail corner ties had almost failed. So out with the mighty Multi-Dowel Box kite!
On previous attempts at KAP (Kite Aerial Photography) with the Box, I had concluded that it just wasn't practical with Box kites.
But today proved that if you operate the Box in the top half of its wind range instead of the lower half, there are no problems at all! With an extra 15 or 20 kph of wind speed, launching on a short line was effortless. Well, aside from the hefty tension in the line that is! The camera rig lifted off fairly gently and controllably just like with any other lifter kite.
Just one downside of doing KAP with big box kites - the setup time. For my Multi-Dowel Box, it's around 10 to 12 minutes to rig and check that all the lugs line up.
The big box kite flew smoothly most of the time, on 90 meters (300 feet) of line. Anchored around some square metal fence posts which had smooth rounded corners.
The windy periods gave the kite a real work-out, pushing it to high line angles and upsetting its flight at times with turbulence and sudden down-drafts. These showed up in the video as wild oscillations to 45 degrees each way! The soundtrack captured the noise of the wind whipping past, calls from passing birds and the urgent note of a soccer umpire's whistle from a neighboring field.
Watching the kite was not particularly relaxing... I half-expected something to give way, starting my Pentax Optio on a rapid descent to the stones below.
This was only the second outing where imagery was taken in the down-wind direction. Hence no flying line in the images, which is a bonus. Unfortunately, I somehow misjudged the position of the top shoelace tie. Result: about 90% of the stills and video featured stormy cloudscapes and precious little landscape or buildings!
I have managed to extract just one movie still which features the intended photographic target - the big Noarlunga shopping complex here in Adelaide, S.A.
Another problem was the sun light which was blocked by cloud most of the time. Such is KAP. At least the panoramic shots of the flying field ended up almost perfect, with the aid of a small solid chair on which the appropriate camera angles were marked.
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