The mean speed of Ni and Pd molecular beams effused from a nonequilibrium source has been measured by means of a phase‐sensitive detection technique and is compared with the statistical mean speed. The mean speeds are determined to be 65,000 and 52,000 cm/s for Ni (1450 °C) and Pd (1320 °C), respectively. The ratio of the mean speed with respect to the statistical mean speed varies from 0.9 to 1.1, and from 0.92 to 1.18 for Ni and Pd, respectively, for the modulation frequency range 300–1200 Hz.