This technique basically works, in that you can get a resonant antenna at a shorter length than you would with plain wire. It's a form of linear loading.

But, it's a worse (lower efficiency) antenna than the one you would get if you simply made a dipole out of the same length of wire and added loading coils to bring it into resonance. You can find calculators to help with coil-loaded dipoles, but the best thing is to build and test. On 160m you can tolerate a low SRF (down to around 4MHz) which means that the optimum arrangement is a couple of really big coils about 80% of the way from the center, with 20% of wire beyond them, but if that's mechanically impractical you can use smaller coils closer to the center, at a bit of a cost in efficiency