VPP (variable propeller pitch)

thingiverse

/!\ UNTESTED !/!\ Not in plastic, designed for aluminium !Attemps to create a variable propeller pitch system for drone motor... in fact not really VPP, not adjustable in flight but before it.AIM1 : Reduce the pitch of a folding propeller in order to adapt a larger one without creating more drag (so electric consumption) while it push air on a larger surface which possibly enhance efficiency (so endurance).AIM2 : Adapt the propeller pitch to the equipment of the drone, so it's mass, allowing to fly safely and more efficiently with a wider mass range.Tarot folding hub is +-12g, this VPP hub +-19.5g in aluminium (density 2.7), so 78g on the 4 motors of a quadcopter.For motor hub with 12mm diagonal M3 flanged srew's (quite usual).In files plate's for -5° and -2.5°, possible to make from -10 to +10.Should require a very accurate CNC machining (untested).Need to thread the central hole M3x0.5 to srew the setting plate (use loctite!).Difficult to produce or at high cost (200€/part by CNC,80€/part in 3D metal printing), consider it as a concept idea.Designed with freecad0.18.