Tag: Tortoise

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Inner Tube Tortoise – Armature

This post in part of a series where I try to make a Galapagos tortoise out of inner tubes. Find all the posts here.

This project is definitely not out of the woods yet, but the “Is This Possible?”-o-meter has swung back towards yes. At least in paper mache or clay.

To be perfectly honest, after my last post I procrastinated…a lot. Much of that was due to a deadline for a submission I was working on (more on that if I get selected). But mostly I wasn’t finding it fun.

Sometimes it takes a bit of a nudge to get me over the hump so I start and find something I enjoy. And in this case that nudge was the lady organising our entries getting in touch to say we had a meeting Tuesday the 6th to discuss our progress so far.

I felt like I needed SOMETHING to show besides five paper mache shells and a pinterest board.

So I decided to use the video I pinned in the last post as my method.

Measuring

I needed to translate my 2D screenshots into a 3D image. I decided to use maths.

I had the handy 360 view of Lonesome George from the AMNH to work from, and I’d taken screenshots and printed out Front, Side, and Back views. I took measurements but was finding it hard to visualise how to combine all those measurements to make sense.

In the end I used this method, hoping to find the distance between the two points:

Does that picture make sense? I ran it past my husband and he said he got what I was on about, so that’s probably good?

Basically I used my quilting ruler to made a grid on top of the screenshots, then measured Lengths and Heights from each applicable view. Then it was a matter of plugging into google’s hypotenuse calculator to get my measurements.

The paper mache shell was double the measurements on the screenshots, so I doubled all my final results. It’s all in this handy spreadsheet:

Which then translated into this diagram:

Assembly

I followed the instructions on the video, but added extra wires to support the angles of the legs and backbone, as they kept wanting to twist.

So instead of just Left legs / Spine / Right Legs, I also attached separate front legs and back legs wires, AND wires that went from each front leg up part of the neck.

But when I held on the shell…the armature looked a little too big. Still not sure why that happened TBH. I probably doubled at the wrong point.

If I held the back of the shell where I wanted it to be, the join of the front legs was about 3cm further forward than it should be. Proportionally it seemed alright, so I just shrunk everything down by 33% so my 130mm backbone measurement became 100mm.

Here are the updated spreadsheet and diagram.

You following so far? Good.

Assembly Try 2

I followed the same method as the first time, as it turned out really solid. And I’m pleased to say it looked MUCH better.

Funnily enough, if you looked at my last post’s horrible attempt at an armature, it’s basically the same size as my 2nd go. So that rough wire sketch didn’t end up being pointless after all.

I even added a little wire just to hold the shell on for the ladies at the WI meeting to see. I’ll add more wire to create a basic shape for the shell to rest on…and pad with newspaper.

Next Steps

Next up is to make a couple more of these – I’m thinking 2 more. This first one will be for paper mache, the second for (hopefully) inner tube, and the third as a backup…or to try with clay if the paper mache doesn’t go quite to plan.

This method was designed for clay, so it’s possible I could struggle getting the paper padding to stay put. But I think with enough masking tape anything is possible.

Keep your fingers crossed for me!

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Inner Tube Tortoise – Model

This post in part of a series where I try to make a Galapagos tortoise out of inner tubes. Find all the posts here.

We left off the last post with a few ideas of how to tackle construction. Crucially I want a model to work off of, like a dress form.

Deciding on a Reference

While looking for reference photographs I realised how little preliminary research I’d done on the Galapagos tortoise. Some of it is very obvious if you know anything about the Galapagos: it’s renown for the variety of species that developed across the various islands. So yes, each island has its own tortoise subspecies, but to boil it down for simplicity, there are two distinct shell shapes: dome and saddleback.

As I mentioned in my last post, I really doubt the judges will be looking for anatomical accuracy. Or for that matter notice if I used a Galapagos tortoise versus any other sort of tortoise. But it does matter to me. I was already leaning towards saddleback as they can have that great upright stance I mentioned in my previous post. But what clinched it was finding a specific tortoise with a huge number of reference photos to work from: Lonesome George.

You may have seen him in the news: the last known Pinta Island saddleback tortoise. Found in 1972, conservationists were looking for a mate for him for decades. Sadly he passed away in 2012 without having any offspring, and his subspecies is currently extinct.

I say currently as there’s some interesting Jurassic Park for tortoise stuff going on to bring Pinta Tortoises back. But I digress.

In addition to all the videos and photos while he was alive, George was taxidermied after he died. There’s a video about it and and a 360 degree view of him on the American Museum of Natural History website. The latter of which is ideal for trying to make a model: I can scrub along the timeline and stop at any angle.

Making the Shell

As it happened we went camping recently, and while digging through the bin of camping supplies I noticed one of our enamel bowls had gone rusty in a few places. But there was a definite upside: it became the basis of my tortoise shell shape.

I used my bowl, paper I saved from parcels, and masking tape to create a basic form, but as it was still a bit squishy I decided a paper mache cover would be best for longevity.

My first was successful but slapdash and a bit thin in places. So I’ve been very systematic covering the rest. At least 5 layers, sometimes six.

Here’s a video of making a good one. As you can see, I put layers in 4 different directions to hopefully give a plywood-like strength to the final piece.

The paste was just a mix of flour and water – starting out in equal proportions, then more water added to thin it out. Whatever I tried, the flour always settled on the bottom, giving my later layers especially gloopy glue. Doesn’t seem to impact the final product, though.

I’ve already made several, and have at least one more in me. Before starting each paper mache cover, I put a layer of compostable clingfilm loosely on my form. Loose so it doesn’t impact the details coming through.

Next Steps

I’m pleased with the results, but they’re really just the beginning. Here’s what I’m thinking going forward:

One will become part of a fully paper mache tortoise. I go through phases of whether or not I think the inner tube version will work, and I’m squarely in a “not sure stage right now” period. Having a completed paper mache version will mean I’ll have *something* to enter and not let the team down, taking the pressure off creating an inner tube version. The paper mache model will also help me get sizing right for the armature of the head/neck/legs for any other versions I create.

I can use the other paper shells as the dress forms for the inner tube version. The spares mean if I inadvertently damage or destroy one it won’t slow me down too much.

Thinking about it…I may need to make more simplified shell shape for inner tube, as having the bumps for scutes in the current form might make it harder to sort my inner tube version out. But I’ll stick with it as is for now.

So stay tuned for my wholly paper mache model. I’ve got garden wire to create a frame for the body and appendages, as well as the 360 degree video and some other in-progress diagrams from the AMNH website to help me out.

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Inner Tube Tortoise – Ideas

This post in part of a series where I try to make a Galapagos tortoise out of inner tubes. Find all the posts here.

When tasked with something new, like making a Galapagos Tortoise out of inner tubes, I like to think around the task. Try to see what other people have done. Come up with a Plan A, Plan B, and maybe Plan C of what approaches I can take.

Deciding how to tackle it partially comes with experience. I’ve made lots of different types of things, but I think anyone can have a go.

Create a pinterest board, like I’ve done. Base it on the one you like best, or mix a few approaches.

My board is a combination of pictures of Tortoises themselves, some pre-made tortoises or turtle craft items, and even a few patterns I could use in a pinch.

I’m really keen to not follow a pattern if possible because I get extra points in the judging. But there’s no shame in using one, a lot of people do, and it’s good to know I could adapt an existing fabric pattern if I needed. To be honest, I don’t think they’re going to be sticklers if it’s it’s not a 100% accurate tortoise.

The tricky bit is going to be the shell, which is a somewhat complicated shapes made from hexagons and pentagons and potentially some other -gons. The internet tells me they’re called scutes that are made of keratin. They get bigger as the tortoise gets older creating ‘growth rings’ – one of the details I really liked from that tortoise sculpture I found recently, and something I’d like to try to show off.

Construction Methods

From looking at the ideas I’ve collected on my Pinterest board, there are several ways I think I can approach this make.

Patchwork Piecing

If you look at Zeno here, the various shapes that make up the dome of his shell have been pieced together from individual pieces of fabric, like the patchwork on a quilt. I’m inclined to avoid this method as it would be a LOT of seams to stitch, including corners.

Now quilt patchwork is mostly made with cotton fabric, which is thin and can create a sharp fold like paper. Think of origami. Inner tube doesn’t do that.

Inner tube has a lot of inherent body and structure that doesn’t pleat or fold sharply without additional stitching. That can be brilliant for a lot of things, but would mean the corners wouldn’t want sit together nicely and there could be gaps.

In a pinch I could try it, because at least my stitching wouldn’t need to be on show.

Flat Piecing

I am so in awe of this amazing turtle shell backpack. It looks brilliant! If you check out the listing itself, the seller has some images on the INSIDE of the bag, which will make this method a lot clearer if you don’t understand my written description below.

Basically instead of the green pieces being attached to one another, they’re attached to black strips that make the framework for the structure. Think of them like…the lead on a stained glass window? Because leather doesn’t fray, the green pieces are layered flat on top of the black, so there aren’t any folds to worry about and everything sits more cleanly.

Again, there’d be a lot of stitching, and this time on show. AND I still don’t have a sewing machine, just one of these Speedy Stitchers I haven’t quite gotten around to testing. Still it’s doable, but I’d probably need one of those stitch punches.

Patterned Shells

The two products above have differing themes on the same idea: create the shell, and then put the various scutes on with either stitching or designs on the fabric itself.

Inner tube is famously black, but I could get some ink like I use for my logos to create the design?

Ignore the Scutes

This handbag from WELCOMECOMPANIONS is brilliant in another way: creating the essence of the animal’s shape without having to worry about fiddly details.

It’s very tempting to go down this route, but I’m really in love with those growth rings.

Plan A, B, C….etc

Ok, so what am I thinking?

Of the ideas above, the ones I love the most are the two bags. While a flat pieced style design would be amazing, I’m worried that my stitching might not be so neat. Another detail I’ve neglected to share is that my tortoise needs to be about the side of a side plate – you’d think that would be easier but it’s often harder: pieces are fiddly and you’re working in small spaces.

Plan A is attempting something like the WELCOMECOMPANIONS bag or the patterned shell method, but add physical layers of scutes to give it that growth ring detail I love so much. I could try stitching them on, or potentially even riveting…though that adds its own set of potential problems.

I might try a standing pose with a longer neck and legs to make it less turtle-y, though that would require some kind of internal structure/skeleton and probably another pinterest board!

If it looks terrible I could go more in the style of the flat pieced bag, possibly even purchasing that pattern and scaling it to the size I need. (Would scaling work, or will that muck up proportions? I’ll cross that bridge if I come to it)

Next Steps

As I’m trying not to use a pattern, my first task is to create a tortoise shell form: something solid I can work off of to get my scute shapes in order. I’ve even pinned a diagram that shows a shell from a few angles to help me get my head around it.

Wish me luck, I most definitely will need it!

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Inner Tube Tortoise – Introduction

I joined my local Women’s Institute group as a way to make some friends in my local area.

I know the WI has a reputation for being all old ladies and jam making, but my group has 40+ members and a good age range. I’m in my 30s and just the other month we had a birthday party for a member who recently turned 100! It’s only a couple of hours out of my month, I’ve heard some really interesting talks, and honestly it’s been great.

The WI itself campaigns on important issues and has even featured craftivism projects in their magazine.

It’s not what many people would expect!

Every year, there’s a WI craft competition at the Oswestry Show on a variety of themes. There are individual and group categories, and WIs and their members from across the local area compete.

Of course I agreed to join in the fun. I’m taking part in a group tabletop competition based on the theme of “A Famous Person” (we choose who). We need to make “three items to be the choice of the competitors. Cookery/produce/preserves/wine/cordial/liqueur, art or craft. Flowers can be entered as a craft item or used as window dressing.”

The group picked Charles Darwin* as he was born in nearby Shrewsbury, and I’ve been tasked with making…a Galapagos Tortoise out if inner tubes! Can I do it? I’m honestly not sure. But I thought why not share my attempt with you lovely people.

Every other Wednesday I’ll write a blog post sharing my progress, good or bad.

And not long after I found out about my item, I came across this:

Mine is definitely not going to be that big!

Come back in a few weeks while I get my head around what I’ll have to do.

*I wasn’t there when they picked the person or what I was going to do. My suggestion was Sandi Toksvig, who has done some a fascinating variety of things.