The Double Knot

Variations And Applications

The single-strand Double knot is just an extension of the Simple knot. Being considerable bigger than the Simple knot though, it is an ideal terminator for a Slip knot. That is, the Double knot will not allow the end of the line to pull through the turns of the Slip knot, once pulled up tight against the turns.

The Double Knot - Single Strand

Knot Tying Illustration - The Double Knot.1. Around and over
The Double Knot - 33. Under and through
The Double Knot - 22. Under and through
The Double Knot - 44. Pull tight

Another possible use is to prevent a Prusik knot from pulling through, since they do tend to work through a bit after being locked and unlocked numerous times. So far, I haven't had any trouble just using a Simple knot as the terminator - but you could use the Double just for peace of mind!

Now, if you really want to go overboard with knot-tying...

The book
Knots: The Complete Visual Guide has an amazing average review score of 5 stars from 12 reviewers - the last time I looked. If it's a more general knot-tying resource you need, this would definitely be it!

The Double Knot - Multi-Strand

The Multi-Strand Double Knot - 1
The Multi-Strand Double Knot - 3
The Multi-Strand Double Knot - 2
The Multi-Strand Double Knot - 4

If you ever need to cut and then re-join a piece of bridle line, the Multi Strand Double Knot is handy. It's so easy to do, and that extra turn of line makes it slip-proof. Unlike the Simple knot when connecting 2 lines!

I also use this knot for flying line, although it probably reduces the breaking strain significantly. But no more than all the accidental knots and frays that a well-used line tends to accumulate anyway! This is not so much of a concern in a bridle since in that case the strain is shared between 2 or more lines.

Apart from modifying a bridle, this also comes in handy when scrapping old sail and re-using the horizontal spar(s).

I actually did this during the trials and tribulations with the very first build of the Dowel Roller kite! The old bridle lines were snipped so they could be fed through holes in the new sail.

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This printable e-book takes you step-by-step through making a 119 cm (4 ft) wide Parachute kite. It's not quite that wide in the air since the canopy takes on a distinct curved shape when inflated. This 14-cell kite performs best in moderate to fresh wind speeds. That's 20 to 38 kph or 13 to 24 mph. In gentle winds, this kite will hang in the air at fairly low line angles. In fresh winds, it pulls firmly for it's size, so small kids should only fly it while supervised!

Every kite design in the MBK Soft Series satisfies the following points...

  • Materials are plastic sheet, tape and line – and nothing more!
  • Tools are a ruler, scissors and a marker pen - and nothing more!
  • All cuts are along straight lines.

For the greatest chance of success, I make recommendations regarding the materials. For example, the type/weight of plastic, type/width of tape and line type/strength. Close enough should nearly always be good enough, since the design is well-tested and should be tolerant of small differences from my original.

Get the e-book for making the MBK Parachute kite. After making your first one in plastic and seeing how it performs, you can try soft Tyvek or rip-stop nylon for your next build.

The e-book is a PDF file - which means printable instructions to refer to while you make the kite. It also means convenient off-line access if that suits you better.

What's New!

  1. Flight Report:
    Sunny And Light For Della Porta

    Aug 19, 17 12:29 AM

    Winter-like weather has been the norm here for many weeks. But today was sunny with very light winds. A rare opportunity to take out the tail-less Della Porta variant with it's latest mini-bridle conf…

    Read More


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Wind Speeds

Light air
1-5 km/h
1-3 mph
1-3 knots
Beaufort 1

Light breeze
6–11 km/h
4–7 mph
4–6 knots
Beaufort 2    

Gentle breeze
12–19 km/h
8–12 mph
7–10 knots
Beaufort 3    

Moderate breeze
20–28 km/h
13–18 mph
11–16 knots
Beaufort 4    

Fresh breeze
29–38 km/h
19–24 mph
17–21 knots
Beaufort 5    

Strong breeze
39–49 km/h
25–31 mph
22–27 knots
Beaufort 6

High Wind
50-61 km/h
32-38 mph
28-33 knots
Beaufort 7