by Flyonline » 01 Jan 2025, 4:09 pm
I thought a few of you might be interested in some of the playing around with windicators for the past little while I've been doing.
Firstly, I fly RC gliders a bit (a lot more in the past), so reading winds and thermals has been instilled in me for quite a few years. When you've got a couple of thousand $$ riding on which way you read the wind, it gets kind of important….
Now while I never used anything other than a strip of wool on the end of my antenna or on a couple of poles further away, there are other ways of reading the wind - body hair is sensitive enough to pick up at least a general direction (especially light winds), watching grass or trees waving in the breeze (or not), seeing spider-webs being caught up in rising thermals, watching birds facing into the breeze along with others. All these are good when you're on top of a windswept clear hill, or open grasslands but not much help when you're 1km up a tight gully with thick bush all around you. We're all familiar with the old windicator - a puff of white chalk dust from a shaker bottle, but I've been experimenting with other options lately for a bit more info.
Traditional Windicator
We use a filter medium at work that is super light and very white, so I grabbed some to try out. It's much lighter than chalk dust but still only lasts a few seconds so really only gives you a wind direction and strength in the immediate vicinity i.e. less than a few meters. It's quick and easy though, unless it blows back into your face. It does give some info on wind strength also.
Bubbles
Yep, break out the kids toys and grab the bubble tube. Bubbles are great because it is possible to create a long stream of them which gives an indication of direction over time, as well as how the stream downwind can break up and disperse. They're also good in bright light as the sun shines off them. The downsides are smell (it's soap after all) and the light/movement. I don't use these a lot, but they can be interesting and fun to try. Some of the RC guys use them constantly to give readings on wind direction and thermal behaviour (two different things).
Bullrush/Cumbungi
I came on to this via hearing some yanks talk about using milkweed. My first idea was dandelion, but it would take a lot of work to get enough to be useful. I also thought of thistles, but they're a serious pest and I don't want to be spreading any around further! Then one day I was walking with my family along a creek and noticed the drifts of bullrush seeds. I mucked around with a handful of heads, and found that when dry they produce prodigious amounts of seed fluff - so much so that I strongly suggest anyone contemplating using them make sure they are contained at all times when you're inside, and don't break them up where you don't want a mess!!! Honestly, 1 big seed head would give you enough for a lifetimes use. There is an invasive species along with native ones, so as I was unsure as to what I had, I took the precaution of microwaving the seeds to death before using them. I put a head inside a plastic pipe to microwave it, then transferred it to a little tube with a cap. It's simple enough to strip a few out and toss into the wind. They are amazingly light and will fly forever, I've been constantly surprised by how many come blowing back past me 30sec or a minute later. It's really interesting standing at the top of a gully and watching a stream of these slide down the hill, or watch most of them drift off in one direction while a few suddenly hit a thermal or sink patch and head off at 90 degrees to the main wind. I tend to use these more to get longer range info rather than all the time e.g. coming to a split in the gully which way is the wind more likely to head or does a slight cross gully breeze carry my scent over the ridge into the next gully or continue to follow the flow of the land? These are also good because they're working until you can't see them, be it 5sec or 5min. The windicator disperses quickly and bubbles pop after a while also. The only downsides I can find so far are preparation and they are a little more difficult to get out once the first few cm's or so are used up and the tube is a little bulky. I've also found it really useful to simply take the top off and blow across the tube which disperses a puff of seeds which then drift off in the direction of the wind. I originally had them in a ziploc bag with a corner cut off, but they became compressed and really no better than the windicator dust until I found the tube trick (an old urine sample tube in my case as they have wide necks).
White Thread Taped to Barrel
While I've not used this on my rifle yet, I used it all the time when flying RC by having a long VCR/Tape streamer attached to my transmitter antenna but it really only gives a very localised wind direction and strength. It can be handy to track the average wind over time though, or matching your local conditions with observations further away - I used to use it to predict incoming thermals from the patterns in the grass or water below.
Cigarette Lighter
The ol' ubiquitous cigarette lighter is something that's never tempted me. That horrible scratching metallic or clicking sound plus a bright light in lowlight conditions seems kind of counterproductive to me, but if it works why not?
I used to use the traditional windicator dust, but since finding the bullrush, I've switched to using it a lot more as it does give a fair bit more info. It is a little more complicated to prepare, but the benefits are far outweighed by the results on the ground, though I still do carry both the bullrush and the windicator in my bino rig.
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