Motorcycle tank

[GrahamForbes]

Hi
I am trying to draw a motorcycle fuel tank, a kind of tear drop 3D shape with a flat base.I am struggling, can anyone point me in the right direction please?

[unearthed]

Curviloft is your friend here http://sketchucation.com/forums/viewtopic.php?f=323%26amp;t=28586 which solved a complex extrude for me recently. also you only need to make one half. Sweep to rail looks useful [url][/url] and has some useful discussions. TIGs extrusion tools may help you too.

If you can draw it in both plan and side elevation, you can probably use the above tools to loft a surface - you'll prob just need to read around a bit

And for complex curves you can't go part bezier http://sketchucation.com/forums/viewtopic.php?p=100509#p100509.

[Jim]

SubD is your best friend for something like this. Here I used this loop subdivision plugin, but it did not produce a symmetrical tank. Artisan is worlds more advanced if you need to do a lot of this type of thing.

I did divide the bottom to make it flatter.

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fuel-tank.skp

[Jim]

Here's another tank that did come out symmetrical for whatever reason using the loop-subdivision plugin from guitar-list.

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fuel-tank2.skp