PROP_DESIGN is open source, public domain, aircraft propeller design software. PROP_DESIGN can also be used to design products similar to aircraft propellers:
Besides traditional aircraft, PROP_DESIGN can also aid the design of:
PROP_DESIGN allows for the design of unducted or ducted aircraft propellers with straight or swept blades and constant or elliptical chord distributions. PROP_DESIGN can be used for all altitudes covered by the U.S. Standard Atmosphere of 1976. Efficiencies of approx. 90% are easily attained, even for effective velocities as high as Mach .8. Below are some other unique features of PROP_DESIGN:
In the past, aircraft propellers have also been called airscrews. This is due to the fact that, at the cruise condition, the wake of an aircraft propeller is helical. Moreover, at the cruise condition, the air behind an aircraft propeller looks like the threads of a screw. It would not be wrong to say that, aircraft propellers work their way through air in the same manner that screws work their way through solids. This does not help to solve the mathematics of aircraft propeller design and analysis. However, it is a simple way of explaining how aircraft propellers function.