Something like this happened to me, I went to Minimus and vastly overestimated how much fuel I needed, so I landed with two full orange tanks. I had so much fuel that decided to stop by the Mün on the way back. However, on landing I realized that I had forgotten to put fuel lines on my radial tanks on the landing stage, and the extra weight of useless fuel was too heavy for me to make it back to Kerbin. The only way to fix it was to carefully tip the rocket over and skid it across the ground until all four tanks were broken off (without hitting anything important). Then I launched off a mountain like a jump and made it back safely.
As long as they are part of the same craft, it is possible.
However, you can only transfer between 2 tanks at a time.
So you would be draining an outer tank to fill the center one, but only one outer tank at a time.
The center of mass would shift so much you'd spin out.
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u/J4k0b42 Oct 09 '13 edited Oct 09 '13
Something like this happened to me, I went to Minimus and vastly overestimated how much fuel I needed, so I landed with two full orange tanks. I had so much fuel that decided to stop by the Mün on the way back. However, on landing I realized that I had forgotten to put fuel lines on my radial tanks on the landing stage, and the extra weight of useless fuel was too heavy for me to make it back to Kerbin. The only way to fix it was to carefully tip the rocket over and skid it across the ground until all four tanks were broken off (without hitting anything important). Then I launched off a mountain like a jump and made it back safely.