T article describes the development of a fluidic inertial platform feasibility model for line-of-sight inertial guidance (LOS-IG) of an air-to-surface missile.f In this guidance scheme, it is assumed that the pilot acquires the target before the missile is launched and that he aims the missile at a predicted intercept point, toward which it flies essentially a straight line course. The platform, which is uncaged at launch, provides steering signals in pitch, roll, and yaw, and can serve as a mounting base for accelerometers. Since it is the critical element in the fluidic missile guidance and control system, a demonstration of its feasibility was considered essential. The following system requirements were projected for the fluidic inertial platform feasibility model 1) angular freedom: ±10° in pitch, yaw, and roll, 2) typical operating time: 1 minute, 3) total error after one minute operating time: not to exceed typically 0.25° in pitch, yaw, or roll, 4) typical maximum #-load: 2Qg along roll; 5g along pitch and yaw axes, 5) fluidic signal transfer: 4 channels for test purposes, and 6) weight, size, power consumption, and environmental conditions: compatible with typical ASM requirements.