The Bucknell Powertrain Laboratory is used for investigating engine emissions, biofuels and compressible pulsating flows. Of particular interest is the measurement of nanoparticles emitted by small engines and technologies that could reduce the concentrations of these harmful nanoparticles. The lab is equipped with two dynamometers, emission measurement equipment, an opacity meter and a fast particulate spectrometer that measures nanoparticle distributions in the exhaust stream.