Internal measurements of carbon monoxide, unburned hydrocarbons and nitric oxide are reported for different axial and radial positions within an Allison T-56 film-cooled liner and used to construct a flow and combustion model for the T-56 liner. In addition, pollutant concentrations were measured at the combustor exit plane for both liquid and vapor propane fuel at various levels of combustor loading. All the results are examined with respect to a model of spray combustion developed for a penetration jet type combustor (Mellor, 1973) and found to be consistent with it.