Abstract: A novel wind-tunnel simulator produces a flow of a gas over a spinning trr projectile to simulate the flame shape from the tracer projectile as though in actual flight. The wind-tunnel simulator comprises a fixture formed with an opening for receiving the tracer projectile therein spaced from the surface that defines the opening. The fixture is fixed to a motor which is coupled to the projectile for spinning it as though in actual flight. Gas is forced through passageways, formed in the fixture, that communicate with the opening, whereby the gas can flow over the spinning, burning, tracer projectile to simulate in-flight conditions.