{"id":6544,"date":"2025-02-28T08:06:31","date_gmt":"2025-02-28T08:06:31","guid":{"rendered":"https:\/\/rcpress.com\/wp\/?p=6544"},"modified":"2025-11-15T11:00:45","modified_gmt":"2025-11-15T11:00:45","slug":"differential-thrust-rc-plane-prop-spinning-directions","status":"publish","type":"post","link":"http:\/\/rcpress.com\/wp\/?p=6544","title":{"rendered":"Differential thrust RC plane prop spinning and weight balance configuration template"},"content":{"rendered":"

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On a standard glider RC plane (the Lidi glider) that has twin motors mounted on the wings, and when one or both motors are spinning in the wrong direction, they won\u2019t generate proper thrust. The motor spin direction depends on whether your twin-motor plane has puller (tractor) props or pusher props. Here’s how it works:<\/p>\n

For Puller (Tractor) Props \u2013 Motors in Front of the Wings (Typical Setup)<\/strong>
\nRight-side motor: Counterclockwise (CCW)
\nLeft-side motor: Clockwise (CW)
\nProps: Use normal (CCW) prop on the right motor and reverse (CW) prop on the left motor.
\nThis configuration helps counteract torque and improves stability.<\/p>\n

For Pusher Props \u2013 Motors Behind the Wings (Reversed Setup)<\/strong><\/span>
\nRight-side motor: Clockwise (CW)<\/span>
\nLeft-side motor: Counterclockwise (CCW)<\/span>
\nProps: Use a normal (CCW) prop on the left motor and reverse (CW) prop on the right motor.<\/span><\/p>\n

Pusheer configuration is the majority.\u00a0 Below shows a 4 motor configuration, with the black tape indicating the motor positions as well as the battery position. You will need at least 720 motors and 50mm prop under 1S.<\/p>\n

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Slipstream here refers to the swirling stream of fast-moving air that the propeller creates as it spins. Instead of pushing air straight backward, the propeller twists it into a spiraling, corkscrew-shaped flow. This happens because each propeller blade not only accelerates the air rearward but also imparts a sideways rotation due to its angle and the direction of spin. The result is a tube of rotating air that wraps around the fuselage and travels toward the tail of the aircraft.\u00a0Simply put, it increases the amount of air flowing over the horizontal stabilizer and elevator. Because the propeller blasts a strong stream of air backward, the tail receives more airflow than it would from forward motion alone, especially when the aircraft is still building speed. This makes the elevator (if there is one) more responsive:<\/p>\n

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If you are using 720 motors (not enough thrust, therefore need a more aggressive elevator setting):<\/p>\n

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If you are using the more powerful 816 or 820 motors:<\/p>\n

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How to Check & Fix Rotation?<\/strong><\/p>\n