Gemfan Floppy Proppy F4019-2 Blade Propeller (Set of 4 — 2CW+2CCW) Clear Grey

The Gemfan Floppy Proppy F4019 is a 4-inch bi-blade folding propeller designed for sub-250g long-range micro drones, ultralight cruisers, and compact freestyle builds. The folding blade design allows the propeller to collapse backwards upon impact, significantly reducing the risk of snapped blades during branch strikes or rough landings while minimising the footprint of the drone during transport.

Key features

• Foldable hub mechanism protects blades and motor bearings during crashes
• Shallow 1.9-inch pitch delivers smooth throttle resolution and high cruising efficiency for extended flight times
• Low 1.42g rotational mass ensures highly responsive motor spool-up
• Moulded from durable polycarbonate to withstand repeated impacts

Specifications

• Propeller diameter: 4 inch (101.6 mm)
• Pitch: 1.9 inch
• Blades: 2
• Material: Polycarbonate
• Mounting: 1.5mm T-mount (2x M2 holes at 5mm spacing)
• Hub thickness: 4.6 mm
• Weight: 1.42 g (per propeller)
• Colour: Clear Grey

This package includes all necessary hub components and blades to assemble four complete propellers. It pairs ideally with ultralight 1404 to 1505 motors equipped with a standard 1.5mm T-mount shaft.