To obtain full data on the following conditions: 1. Lift, drag, L/D, and moment curve about the center of gravity for angles from below zero lift to above maximum lift (with and without tail plane and with and without elevator). 2. Moment curves for angles of elevator settings, -30°, -20°, -10°, 0°, +10°, +20°, +30°. 3. Downwash of complete model. 4. Yawing moment for rudder angles of 5°, 10°, and 20° at angles of attack of 0°, 8°, and 16°. 5. Rudder moments. All tests run at 40 miles per hour. Angle of attack is referred to thrust line. All stabilizer and elevator settings are referred to the thrust line. The test was conducted at the Massachusetts Institute of Technology during May, 1922, in the new 4-foot wind tunnel.