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The Thrifty Rocketeer blog continues….

Normally, this blog tries to provide you with some useful, positive tips.But at this time, we are going to take a look at a few things Not to try.

Just tonight, I was chatting with some rocketry associates by Zoom, and one of the more senior guys holds up a few pieces destined for his high energy rocket. If you loved this post and you would like to get additional info relating to jacquard elastic band (Godotengine.org) kindly pay a visit to our own web site. He’s asking for assist and advice on easy methods to proceed.

He’s bought a medium sized carabiner in his right hand, and in his left is a strip of what he is calling an elastic band. (It looks extra just like the headband that Spock wears in Star Trek IV: The Voyage Home, but no matter.)

It’s a protracted length or skein of two inch broad elastic band that looks like it might both go in a truss, a bra, or some type of again brace.

And he is asking, “How do I attach this to that?”

The discussion starts and guidelines out sewing (cause the stitches won’t stretch), rivets (cause they’re going to pop whenever it stretches), grommets (for the same cause) and glue, (because it won’t “give” without cracking).

One rocketeer said, “Dump it, just get a nylon rope or related woven tube, and tie it on”, just as you would in mountain climbing.

We all just about agreed that the two inch width of the elastic band elastic band won’t allow for a tight knot to be tied across the carabiner, so we settle on the nylon tube/rope concept.

Now this started me pondering about the time that I thought-about making my very own shock cord out of elastic. I used to be doing a scratch construct for a recycling display on how you would flip extraordinary trash right into a quite simple rocket and nosecone with plastic Wal-Mart bag parachute. For a shock cord, I had settled upon an previous pair of males’s tighty-whitey briefs.

I convinced my wife to lend me her pinking sheers, and i used a seam ripper to free the elastic band from the pair of shorts. In a short time, I tired of the seam ripper, and went for a straight sharp pair of fabric sheers, and simply cut as near the waist band as I may.

Now that I had the loop of elastic free, I do not recall if I cut across the seem or ripped it free, but I wound up with a single length of one inch broad elastic that nonetheless had a whole lot of stretch in it.

Deciding that the band was too broad, I took the fabric sheers and reduce down the middle of the band leaving an equal width of elastic band on both aspect of the cut. What I hadn’t counted upon was the fraying, which began instantly. The 2 elastic strips, whereas about forty two inches lengthy, curled and buckled, refusing to put flat.

This was symptomatic of how the elastic band would behave regardless of how I minimize it , stretched it, or steam pressed it. I discovered that you Can’t reduce an knitted elastic webbing band lengthwise had have it work. (Now, for the purposes of my poster board show of the parts of a rocket, it labored nicely sufficient, but for actually use in a rocket, my idea would not have worked.)

What WOULD work is the acquisition of about three ft of narrow 1/8-1/4 inch elastic from Joann Fabrics or comparable store. Aside from the run on this materials to make masks during the pandemic, this is able to work for smaller, low-power rockets in case you needed to change a shock cord.