Q:

What are some tips for making model airplane propellers?

A:

Quick Answer

Tips for making a model airplane propeller include selecting the proper materials and ensuring propeller weight and shape are suitable for both the aircraft and engine. Propeller performance characteristics can vary drastically depending on size, shape and dimensions. Making a propeller with a higher pitch angle can improve the flight speeds of a model plane.

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Full Answer

Creating a heavier propeller can provide model aircraft with a lower, more reliable idle. Another tip for creating a propeller is to ensure that it does not unbalance the aircraft. Low RPM engines may require propellers with wide blades, while high RPM engines are able to make more efficient use of narrow-bladed propellers.

Engine performance can also determine the number of propeller blades a model airplane may be able to support. Single-blade propellers are counter-balanced and may be ideal for high RPM racing planes. Two blade propellers are the most efficient configuration for model aircraft. Due to the smaller propeller diameter, three or four-blade propellers cause greater disruption to trailing air that may inhibit aerodynamic performance.

Test the propeller to ensure proper balance before mounted it to the aircraft. To adjust the balance of a propeller, drill small indentation in the back plate, and test the rotational balance manually.

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