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## Main Question or Discussion Point

Hello all,

I am looking for some guidance on making a mechanism that will retract a 900 metre length of fishing wire by itself.

The idea is that the wire can be pulled up to 900 metres from its source and once let go it will return to the spool like a tape measure (without a crank or motor).

I was wondering if it would be possible to use the mechanics of a spring-based tape measure as a starting point, and use a system of gears to increase the extension of the spring? But this is as far as I've got and not sure if/how it would work.

Any guidance or suggestions on how to realize this is much appreciated.

Thanks in advance

I am looking for some guidance on making a mechanism that will retract a 900 metre length of fishing wire by itself.

The idea is that the wire can be pulled up to 900 metres from its source and once let go it will return to the spool like a tape measure (without a crank or motor).

I was wondering if it would be possible to use the mechanics of a spring-based tape measure as a starting point, and use a system of gears to increase the extension of the spring? But this is as far as I've got and not sure if/how it would work.

Any guidance or suggestions on how to realize this is much appreciated.

Thanks in advance