  The recently developed effective interaction method for the hyperspherical
harmonic formalism is extended to noncentral forces. Binding energies and radii
of three- and four-body nuclei are calculated with AV6 and AV14 NN potentials.
Excellent results for the convergence of the expansion are found, particularly
for the three-nucleon system. Due to the higher density the convergence rate is
a bit slower for the alpha particle. In comparison to central potential models
there is only a very slight deterioration of the convergence due the tensor
force, while other potential terms have no visible effect on the convergence.
The obtained values for binding energy and radii also agree well with the
results in the literature obtained with other few-body techniques.
