Stearman: Idle: Low; Stearman Xa-21. Low, Growling Motor With Rhythmic Metallic Pinging And Engine Pops. Steady Idle. Close Perspective. Prop Plane.
Stearman: Idle: Low; Stearman Xa-21. Low, Growling Motor With Rhythmic Metallic Pinging And Engine Pops. Steady Idle. Close Perspective. Prop Plane.