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    CTsw, Jabiru, Gazelle
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    Melbourne
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    Australia

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  1. My fuel tank is a weird shape

    image.png.fc2e47ab5fd3108c98a63e318bc5c42e.png


    Constructing this was proving to be a nightmare, so I created a flat-pack, which looks like this.

    image.png.4e1dd4c8d67af6882abe760b7711dae2.png

    Sketchup can't do this, so I had to do it by hand. I'll cut it tomorrow. Basically, I'll epoxy tape along all folding seams on the inside (red lines), seal the reast of the MDF with epoxy and bend everything together when the epoxy is still in the green stage. The top is a separate piece, which will allow me to reach inside and apply the fillets. Then I'll bond the top on. If this works, I'll commit to 9mm ply.

     

    This will also allow me to accurately measure the tank's capacity.


    I have yet to find anything definitive regarding West Systems epoxy and fuel tanks (I don't plan to use ethanol-fuel). Vinyl ester worries me, because it looks like I'll have to do the complete layup on the inside in one go (including the fillets) because VE doesn't stick to VE very well.

    However, I've discovered that 747 Polyester is about as gas, ethanol, diesel etc proof as one can get, and it isn't expensive. If I can find some locally, I'll go with that.

    Duncan
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