Pitch – the theoretical distance in inches that a propeller moves forward in one revolution. Think of a screw in wood. If you increase the angle of the threads, it will move further into the wood in one turn. Diameter – the diameter in inches of the circle that the blade tips will cut. Or, the distance […]
If you look at a propeller from behind, and visualize a circle that the blade tips would draw, you will see that the blade of a 3 blade prop covers about 50 -55% of the circle. (This is called diameter area ratio, or DAR). You can add thrust within this drive circle by increasing that […]
Of course! All propellers flex. What is often missed is that flex is a good characteristic. For example, if a prop flexed under the load of acceleration, it would actually be reducing its pitch, which in turn would produce a faster acceleration. A problem would occur only if the prop failed to return to its […]
When propellers made of composite, or plastic, first came on the market over 14 years ago, I was very skeptical that they could match an aluminum prop in strength and performance. Today, while not all composites are created equal, a couple of manufacturers use space age composites to exceed the strength of the old traditional […]
Probably none! These are two separate objectives that require a separate specialty prop to accomplish each one. For example, while a five bladed propeller could get you onto plane quicker, it will usually knock three to five mph off your top speed.
In most cases, by simply making a direct conversion to stainless in the same size as your aluminum prop, you will notice an improvement in both acceleration and top speed. The reason for this is very simple, but frequently misunderstood. Stainless is seven times stronger than aluminum. Propellers don’t have to be that much stronger […]