Design

Propellers of 3rd generation : efficient, light and strong

High CL profiles by Hélices E-Props

Adapted diameter and blades' numbers defined according to engines and reducers

Specific E-PROPS design with high CL profiles : more thrust, fuel economy and noise reduction

PLUG'n'FLY models

PLUG'n'FLY are the lightest and the strongest propellers on the market

They equip about 50 paramotors engines of all brands. According to diameters, engines and their reducers, it exists mor than 600 PLUG'n'FLY models sold in more than 64 different countries.

Weight

About 600 gr for a 125 cm diameter model, some models less than 500 gr !

About 30 to 50% less than competitor props

The E-PROPS are the lightest propellers on the market

Blades

100% carbon + epoxy resin

Optimum use of carbon fibers to obtain light and strong blades

Foam core with D-Box

RTM manufacturing process

=> see manufacturing

Carbon braid, with continue fibers between upper and lower surfaces of the blade.

The HCF (Helical Continuous Fibers) process, specifically designed by E-PROPS, ensures an exceptional strength of the 100% carbone + epoxy resin blade, from leading edge to trailing edge, from blade's foot to tip.

Blade's foot

Two sectionnable parts, very simple to assembly

Thickness of the blade's foot : 28 mm

Leading edge protection

Strong leading edge protection

Internal shielding of the blades : injection at the leading edge of a special resin with Nanostrength® (ARKEMA product : high kinetic energy absorption capacity)

Moment of Inertia

About 500 kg.cm² [for a 125 cm diameter model]

Strict respect of the limitations of the engines manufacturers

Balancing

Propellers balanced with an electronic bench

Tracability / blade's remplacement

Model's ref on each blade

RFID chip in each blade

Unique serial number on each blade

Strict quality control; quick replacement of one blade possible)

=> see manufacturing

To know if a blade can be repaired or not, please send pictures of the damages and indicated the serial number (on the hub)

Mechanical Strength / Tests

Centrifugal load tests : HEP_PLUG_centrifugal_load.pdf

Carbon propeller can hold 4 times the maximal load during 1 hour without any damages (AESA standards ask for 2 times)

The E-PROPS are the strongest propellers on the market.

Tracking / Dynamic Gap

The maximum static tracking is 10 mm.

Dynamic gap : up to 2 cm (the blade can move towards the engine at max power)

This gap is depending on the engine assembly, on the cage and on the silent-blocks.

It is recommanded to part the propeller from the cage of minimum 4 cm.

Holes

The holes on the PLUG'n'FLY are made to adapted to each engine - reducer.

On some models, drilling parterns are using only 4 holes on the 6 holes. It is normal and those configurations have been calculated and tested.

6-blades propellers are assembled on 130 hp engines by 6 screws M8; 4 screws M8 are enough to assemble a propeller on a 35 hp engine.

Never put a rubber spacer between the reducer and the propeller; the screws would break.

Torque

Screws 6 mm = 10 N.m

Screws 8 mm = 20 N.m

Max RPM

3.000 RPM (measured @ propeller)

Max power

about 35 hp on engine with reducer

Never user a PLUG'n'FLY propeller on a thermic direct drive engine

Maintenance

Maintenance before each flight: visual inspection of the propeller and check of the screws

Periodic maintenance: check of the tightening every 25 hours of flight or every 3 months

Cleaning of a carbon propeller is made with a sponge, with some water with soap, or with a product for windows cleaning.

Small impacts / Repairs

Small impacts can be easily repaired (epoxy or araldite resin, small sanding)

If an incident or a shock require an important repair, this one must be realized bu HELICES E-PROPS or an agreed repairing center.