How to read a drone tensile test form? Unveiling the core data of motor and propeller pairing.

Whether assembling multi-rotor drones independently or developing large-scale industrial application platforms, the combination of motors and propellers directly determines the aircraft's payload capacity and range. However, when purchasing carbon fiber or polymer propellers, many people are unsure where to focus their attention when faced with a densely packed "tensile test table" provided by the manufacturer.

Today, we'll take the RAYI "32x12 inch" carbon fiber integrated propeller test chart as an example to give you a hardcore breakdown: How exactly do you read a drone tensile test chart? What are the key data we should focus on most when selecting a model?

I. Test Environment and Basic Parameters (An Essential Prerequisite)   

Before looking at the core data, we first need to examine the basic information at the top of the table, as this is a prerequisite for ensuring the data's reference value:

 Diameter/in and Pitch/in: These are the core specifications of the propeller. In the table, 32 represents a blade diameter of 32 inches, and 12 represents a pitch of 12 inches 

(i.e., the distance the propeller travels in one revolution in an ideal solid medium).

Environmental Parameters (Temperature, Air Pressure, Humidity): Air density significantly affects propeller lift. The table records 26.2℃, 100.52 KPA, and 27.2% humidity, 

indicating that this is real data measured under standard ambient temperature and pressure conditions.

II. Item-by-Item Breakdown: The Meaning of Each Column in the Table

The main body of the table shows the motor's operating status at different throttle outputs, from left to right:

Rotation Speed (RPM): The number of revolutions per minute. The higher the RPM, the greater the downward airflow generated by the propeller, and the greater the thrust.

Thrust (g): The upward lifting force generated by the rotating propeller, usually measured in grams (g) or kilograms (kg). This is the most intuitive data for measuring the drone's 

"flying weight."

Torque (N·m): The rotational force required for the motor to overcome the propeller's air resistance. Excessive torque can easily lead to motor overheating.

Shaft Power (W): The mechanical power output by the motor to the propeller. Note: Power directly affects power consumption!

Propeller Efficiency (g/W): Also known as "efficiency" (thrust ÷ power). It represents how many grams of thrust are generated per watt of electrical energy consumed. 

This is the core indicator for measuring how long a drone can fly.

III. Three "Golden Indicators" for Selection: Thrust, Propeller Efficiency, and Current

If you have limited time, when looking at the Thrust test table, focus on these three crucial aspects:

1. Thrust: Focus on the "Hovering Point"

Don't just look at the impressive maximum Thrust at the bottom of the table (e.g., 16165g, or 16kg). In real-world applications, drones spend 80% of their time hovering or 

cruising smoothly.

How to read it: Calculate your drone's total takeoff weight and divide it by the number of rotor shafts. For example, a quadcopter drone weighing 16kg requires 4kg (4000g) 

of Thrust per shaftto maintain hovering. In the table, you should focus on the rows where Thrust is around 3900g - 4300g; this row represents your actual future flight performance.

2. Propeller Efficiency: Higher values mean longer flight time

Propeller efficiency is the touchstone for evaluating the quality of propeller aerodynamic design. High-quality propeller blades (such as meticulously crafted 

carbon fiber or wooden blades) consume less energy to generate the same thrust.

The trend: The table clearly shows that lower RPMs result in higher propeller efficiency (up to 32.0 g/w at 726 RPM, compared to only 7.1 g/w at full load).

How to interpret: In the row that meets your hovering thrust requirements, the higher the propeller efficiency value, the better. Generally, a propeller efficiency

 between 12 g/w and 15 g/w is ideal for large drones hovering (e.g., 13.2 g/w for a thrust of 4393g in the table).

3. Current/Power: A Matter of System Safety

Although the table directly lists "shaft power (W)," it is closely related to the "current (A)," which is of utmost concern to everyone. According to the physical formula 

$P = U \times I$ (power = voltage × current), with a fixed battery voltage (U), the greater the power, the greater the current consumed.