  We present results from Speckle inteferometric observations of fifteen visual
binaries and one double-line spectroscopic binary, carried out with the HRCam
Speckle camera of the SOAR 4.1 m telescope. These systems were observed as a
part of an on-going survey to characterize the binary population in the solar
vicinity, out to a distance of 250 parsec.
  We obtained orbital elements and mass sums for our sample of visual binaries.
The orbits were computed using a Markov Chain Monte Carlo algorithm that
delivers maximum likelihood estimates of the parameters, as well as posterior
probability density functions that allow us to evaluate their uncertainty.
Their periods cover a range from 5 yr to more than 500 yr; and their spectral
types go from early A to mid M - implying total system masses from slightly
more than 4 MSun down to 0.2 MSun. They are located at distances between
approximately 12 and 200 pc, mostly at low Galactic latitude.
  For the double-line spectroscopic binary YSC8 we present the first combined
astrometric/radial velocity orbit resulting from a self-consistent fit, leading
to individual component masses of 0.897 +/- 0.027 MSun and 0.857 +/- 0.026
MSun; and an orbital parallax of 26.61 +/- 0.29 mas, which compares very well
with the Gaia DR2 trigonometric parallax (26.55 +/- 0.27 mas).
  In combination with published photometry and trigonometric parallaxes, we
place our objects on an H-R diagram and discuss their evolutionary status. We
also present a thorough analysis of the precision and consistency of the
photometry available for them.
