This paper focuses on studying the induction of primary and secondary air to a specialized reactor of the co-current gasifier of IISc design. In a co-current gasifier, air and solid fuel move in the same direction, and the flame front moves in the opposite direction. The present study is focused on the behavior of the reactor with a variance of primary air alone and with a combination of primary and secondary air flows. The flame can be stabilized at a fixed location with secondary air induction. A new parameter in these experiments is the ratio of secondary air flow rates to that of primary air (Rsp) used for the co-current gasifier. With primary air alone (Rsp = 0), the flame front propagates upward against the airflow direction. With the induction of secondary air of about one-third of the primary air, the flame propagation is strongly disturbed, and the propagation rate is retarded by 3–4 times. The flame propagation rate steeply drops with increasing secondary air induction, and above a threshold limit (at about Rsp = 0.4), it reduces to zero. The investigation also reveals the variation in the gas calorific value with Rsp.