# How are RC propellers measured?

## How are RC propellers measured?

Scale RC aircraft propellers are usually specified as diameter × pitch, given in inches. For example, a 5×3 propeller has a diameter of 5 inches, and a pitch of 3 inches. The pitch is the distance that the propeller would advance if turned through one revolution in a solid medium.

How do I choose a motor and prop for my RC plane?

The kv of your motor is the number of revolutions per minute it will spin per volt. The lower the kv, the stronger the motor and as a result, you will want a larger propeller for maximum thrust. Often slower motors will also result in slower flying planes, a big plus for your first hobby grade rc plane.

How do you read a propeller model number?

McCauley Aircraft Propeller Model Designations A numerical value at the beginning of the model number in either the first or second position (i.e. B2 or 2A) indicates the number of blades. (This first constant will be followed by a two digit number value between 31 and 37 which reflects a particular McCauley design.)

### How do I choose a 4 blade propeller?

A 4 blade propeller will usually have a smaller diameter for the same pitch size of the 3 blade equivalent. This is one reason they spin up quickly and yield good acceleration. The blades are often a bit smaller but offer more total blade area because of the additional blade, so they have more grip on the water.

How do you measure a RC boat prop?

Diameter: prop size, measured between the tips of the blades. Or 2 times the measurement between the tip of the blade and the center of the hub. Larger diameter props are normally used on large and heavy hulls. With R/C gas boats, 65 to 80 mm is the standard.

Does a 4 blade prop vs 3?

## What are the prop numbers on a propeller?

The prop numbers are usually a set of 2 numbers. The first one is the total prop diameter. The second is the pitch of the prop blades themselves. For instance..I use APC props.

What do the prop numbers mean in RC groups?

– and it says nothng about how many blades there ARE. So although the marked stuff is a start at specifying the prop, in the end everyone scratching for top performance buys half a dozen, and tries them all to get the one that feels best. Last edited by vintage1; Sep 24, 2007 at 06:53 AM.

Why is it important to choose the right propeller for RC airplane?

Selecting the correct propeller for your rc airplane is crucial if you want to get the optimum performance from your plane, regardless of its power type. In the worst case scenario, the wrong prop can cause serious damage to components and this is especially true for electric powered rc airplanes.

### How are pitch and diameter of a propeller related?

The first number is the arc diameter created by the spinning prop i.e. propeller length 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… Essentially, diameter determines the ‘grunt’ and pitch determines the speed of the plane.