The staff at any kite shop will tell you that Dacron - a trade-name for a type of polyester - is ideal for flying single-line kites. Compared to cotton and Nylon lines of the same strength, it is lighter and thinner. Also, its high melting point means that it resists abrasion. Handy for if you get a tangle with someone else's flying line!
Flying line advertised as 'polyester' has very similar properties.
There is some stretch in the material, but this is of no real concern when flying a single-line kite. If you ask me, there's nothing wrong with a bit of shock-absorption in gusty winds!
Some Dacron as delivered
Some Dacron as delivered
Our own experiences with small Skewer kites on 20 pound line and larger Dowel kites on 50 pound line have been very good.
The kites fly high with much less sag than a line made of cheaper material would have. Mind you, sharing a single flying line among several kites makes the cost seem more reasonable!
The occasional tangles do still happen, but for us it's been mainly due to carelessness.
You know, you're in a hurry winding up the line and you don't take enough notice of some resistance...
Next thing you know, a small pile of loose line has arrived at your hand in the form of a tangle! Usually, it's still fairly loose and it only takes a few minutes to sort out.
We fly most of our MBK kites on braided Dacron. The only exceptions are the Paper Series and Indoor Series designs which fly on polyester sewing thread :-) ...
The History Of Dacron
To make it more digestible, how about a list! Here we go...
- The 1929 writings of Wallace Carothers about polymers led to the discovery of polyesters.
- Carothers invented Neoprene in 1930 and Nylon in 1935.
- 2 British chemists, John Rex Whinfield and J. T. Dickinson were inspired by the work of Carothers.
- Whinfield and Dickinson invented a new high-melting-point polyester in 1941. They called it Terylene.
- ICI patented the Terylene polyester.
- DuPont purchased the U.S. rights to Terylene in 1945 for further development.
- With modified Nylon technology, a DuPont pilot plant in Seaford,
Delaware produced a version of Terylene they called Dacron fiber.
- DuPont moved to mass production in its huge Kinston, North Carolina, plant in 1953.
- "The rest, as they say, is history." Yeah I know, that tired old cliche...
You could spend 30 minutes or so wandering the Web to find all
the above info in several places, often buried in long paragraphs. But I
suspect you would rather just glance at the list to take it all in, in
under half a minute!
There's my roll of 200 pound
braided flying line up there in the photo. In its natural color.
Some Technical Facts
A long paragraph of technical data would be hard going, so here's another list...
- The scientific name for this material is polyethylene terephthalate.
- It's a condensation polymer obtained from ethylene glycol and terephthalic acid.
- The molecules are very long linear chains that cross-link to each other.
- Each linear chain consists of 10 Carbon atoms, 8 Hydrogen atoms and 4 Oxygen atoms in a group, which is repeated many times giving the chain its long length.
- The melting point of Dacron is a high 256 degrees Celsius (496 degrees Fahrenheit).
Finally, here's a not-so-technical fact... There are
more uses these days for this synthetic fiber than you could poke a
stick at! In my view, by far the most important one is for tethering
single-line kites to Terra Firma ;-)