This is a collection of rank-3 temperaments tempering out the semiporwellisma, 16384/16335 = [14 -3 -1 0 -2.

Temperaments discussed elsewhere are:

Considered below is the no-7 subgroup temperament, but we can begin by looking at the rank-4 temperament.

Semiporwellismic

Subgroup: 2.3.5.7.11

Comma list: 16384/16335

Mapping: [1 0 0 0 7], 0 1 1 0 -2], 0 0 2 0 -1], 0 0 0 1 0]]

Mapping generators: ~2, ~3, ~128/99, ~7

Template:Val list

Badness: 0.219 × 10-6

No-7 semiporwellismic

Subgroup: 2.3.5.11

Comma list: 16384/16335

Sval mapping: [1 0 0 0 7], 0 1 1 0 -2], 0 0 2 0 -1]]

Sval mapping generators: ~2, ~3, ~128/99

Template:Val list

Badness: 0.0922 × 10-3