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Wednesday 19 January 2022

The Killer Ap for all this stuff!


Scoping - Fairfield fly fishing ponds a bit shallow for model raft sailing.


Better! A pond in North Carlton. Testing a new tilting trike at the time, it is on the left.

Completing the tetrahedron- the red jig ensures the brown parts are at the correct angle. They are held on by the blue rubber band until gluing is complete.

Lower corner of raft. The holes in the cans are as high as possible. The ring pull is removed for flatness, and then the hole covered with gaffer tape. Water was pretty calm, the taping probably wasn't needed.

Final assembly was taping.

It works and

Sails away quite happily.


Selfie with cans icosahedron boat ...... thing.

Managed to take some ok .....

photos of it!


For a while, I have been building structures from drink cans (previous posts here, here, here, here, here, and here) for a few weeks now, and eventually worked out that most of the structures I've made could float and sail. I spent some of Monday scoping for sailing spots in the city, and a fountain and pond in North Carlton looked like the best bet.  

But by Tuesday I had reserved myself a trip to Aireys Inlet and decided to try it down there, and headed off today (Wednesday). There were a few last minute construction details, mainly with the tetrahedral raft. I 3d printed a jig to ensure can holders were correctly angled, and then glued them onto the cans. And finally I worked out that taping some of the cans together could be done last to simplify assembly.

The can-rafts (Kon-Tinnie? Kon Biri?) ready, I went to the Aireys Painkalac creek, taking one of the rafts at a time down.

The tetrahedron raft  worked well, and sailed quite quickly but I only got a few shots before swimming out to retrieve it. With the icosahedron it went much better. I swam out with the "thing", carrying a camera as well, and managed to get some good photos and a couple of videos. The videos are here and here, the first shows a spinifex like tumbling, and the second is up close and just shows floating.

Anyway, I hope you enjoyed this post. The models are put together using just one type of 3d printed part which I hope to put up on Thingiverse soon.


Steve Nurse

Update, Jan 21

After filming the big rolling raft a few days ago, I decided to have a go at filming the tetrahedron raft as well. I needed to leave Airey's Inlet, and the weather was getting warm, so a river swim before I got going was just the thing. I grabbed a bit of firewood to use as the camera deck and there was not much left to prepare. A pic is below, and the raft- camera video is on youtube here.


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