ABSTRACT
Resistor-capacitor planes can be used for conversion into robotic planes. Propellers are extremely important for robotic planes, helicopters, boats, and submarines. They provide the thrust for forward motion as well as for lift. Propellers can come in many blade configurations such as two-blade, three-blade, and four-blade. Propellers produce forward thrust by accelerating air/fluid back. The amount of fluid forced back depends on the speed of rotation of the propeller as well as at its pitch angle. Propellers can be designed to have fixed pitch, or can be made such that the pitch of the propeller can be changed in real-time. The airspeed that any part of the propeller blade is subjected to depends on the distance of that part from the center of rotation. Therefore, the propeller blades are twisted since at different radii, the relative speeds are different, and that makes the angle of attack different, if the blade is not designed to be twisted.
