Rubber band

31 January 2024

I have not seen any 'proper modelling use' rubber loops or strips in Singapore. 

The office/household/hawkers' rubber bands are readily available and cheap.

The office rubber bands can be used for catapult launch models, but not for rubber powered propellor models because they are only about 2" in diameter and are 1/16" x 1/16", also they do not take many winds.

To use the office rubber bands measuring about 2"x1/16"x1/16" for rubber powered propellor models, they need to be spliced or joined together to form a longer loop. Bard suggest the square knot and the surgeon knot:

• This is the simplest and quickest method, but it is also the weakest. It's best for temporary repairs or low-tension applications.
  Opens in a new windowin.pinterest.com

  Square knot on rubber band
• Simply tie a square knot with the two ends of the rubber bands. Make sure the knot is tight, but don't overtighten it, as this can break the rubber band.

2. Surgeon's knot:

• This is a stronger knot than the square knot, but it is still relatively easy to tie. It's a good option for medium-tension applications.
  Opens in a new windowwww.cutoutandkeep.net

  Surgeon's knot on rubber band
• Make a loop with one rubber band and hold it in place with your thumb and forefinger.
• Thread the other rubber band through the loop, then around the first rubber band, and back through the loop.
• Pull both ends to tighten the knot.

I had the square knot in mind before the query and didn't realise there was a surgeon's knot but I think that will consume much of the short rubber strand. One end may be using a thin cord or thick string so that I can hook it to the propeller shaft and the retainer. I have to think about it. 

How about a double sheet bend? Or a whatyoucallit