# What do the numbers mean on a prop?

**Numbers**Stamped on the Propeller.

**number**describes the diameter, pitch and, sometimes, material of the propeller, according to BoatFix.com. The diameter and pitch can be separated by the letter "X," CompProp states.

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Similarly, what do the numbers on RC props mean?

All **rc propellers are** designated two measurements, both usually given in inches. The first **number** is the diameter of the imaginary disc ('arc') created by the spinning **prop** i.e. the length of **prop** from tip to tip. The second **number** is the pitch and this is the harder of the two to understand - but we'll give it a go

One may also ask, how do you read a RC propeller number? The first **number** is the **prop's** diameter. The second **number** refers to the **prop's** pitch or how much of a "bite" it takes as it revolves. The **number** indicates the theoretical distance the **prop** will advance with each revolution, assuming ideal conditions.

Besides, how do you size a prop?

**The size of a propeller is defined with two sets of numbers, diameter and pitch, with pitch always following the diameter.**

- Diameter. The diameter is two times the distance from the center of the hub to the tip of the blade.
- Choose the Right Prop for Your Boat.
- Cupping.
- Ventilation.
- Cavitation.

What is the difference between a 17 and 19 pitch prop?

The **17**" **prop** will give you a better hole shot but lower top speed. If it is to small it the engine may go over the recomended top RPMs. The **19**" **prop** will give you less of a hole shot but a higher top speed if the motor is strong enough to turn it **in the** recomended top RPM range.