Skip to main content

Origami Water Boatmen

Small bug you can find swimming on dirty pool. I frequently find them on natural body of water during summer hikes. They are obviously named after their oar-like legs, used for paddling.


I was studying Ivan's crease pattern for 30 degree model. Thirty degree has interesting property that it is able to easily and compactly pack three equal length flaps, which is something I have forgotten all these years focusing on 22.5 degree. 
Left: 30 degree.
Right: 22.5 degree.

It is useful for insect model whose abdomen is folded out of middle flap. We can put flaps in the bottom and sides. In the end we got a hexagon-like structure.
There is an excess paper in the bottom. It can be used to lengthen the bottom legs. That made me realize we can fold this into an insect with long and somewhat flattened rear legs. Enter water boatmen.

This bug is quite simple. No noticeable antennae or large wings to fold. Its frontmost legs are much shorter than the others. It does have big compound eyes though. I just need to rework the top part of the crease pattern to fold out the front legs and eyes. I used a straightforward adaptation of common 22.5 molecule into 15 degree.
Similar molecules represented with 22.5 degree (left) and 30 degree (right).

What's left was just test fold. I want this model to be simple and can be folded out of 15 cm paper. I tried to make the abdomen less boring by making interesting folded wings, but none succeeded.


As planned I used 15 cm of common origami paper (kami).


Popular posts from this blog

Origami Condor v1.2

Got an idea to improve the design while commuting. Change log from previous version : Extra row of feathers (coverts) Curved the secondary feathers' terminal edge Slots on primary feathers are now monotonically decreasing in size Here you can see the comparison: Before vs after

Warped and Wrinkled Paper Curse

After starting using Carboxy Methylcellulose (CMC), I began to wonder if my setup wasn't right. The problem was my double tissue would always peel itself when drying. There will be high pitched popping sound from the paper every now and then. Finally it would be completely off the surface. Whereas on every tutorial I saw, the paper will still stick to the surface and we have to peel it off. The bad part is the paper will be warped; it's not flat. It is difficult to fold a straight line on paper like this. Imagine precreasing a grid or locating references when your fold can be bent due to the paper's bump. I have theory on why the warp happened. Before going to that, it is important to know that: When a paper is wet, it expands. When it dries, it will return to the original size. However it will keep its shape when it is wet, meaning that if it is bent when wet, it will retain that bend when dried.  When my paper dried partially, that region will shrink. This created differe

The Foolproof Way to Divide Paper Into N'ths

We all have been there... asking how to divide paper into 14ths or 15ths and occasionally got the answer of "just make 16 grid and cut it". Another scenario is being terrified with prime number division like 13ths or 17ths. In reality it's not that difficult. This post will share how to make such division just inside your head so you can start folding right away. I promise it won't require any arcane maths.