E-PROPS HI-TECH CARBON PROPELLERS



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MANUFACTURING OF E-PROPS PROPELLERS

 

 

 

 

The E-Props propellers are fully made in France, in the E-Props workshops, in Provence. The 1700 m² worshops are equiped with 12 CNC machining centers. The company has developed more than 140 propellers models (2017-10-16).

 

E-Props propellers CARBON range are designed and manufactured to be very light and strong. Materials and manufacturing process have been validated by many tests.

 

 

hélice e-props en composite

 

 

helices e-props propellers the strongest on the market

 

 

 

BLADES

- made in carbon braid, with continue fibers between upper and lower surfaces of the blade

- epoxy resin

- foam core with internal spar (D-Box)

- blade's foot with titanium ring inside

- 100% carbon, no metallic part = no galvanic corrosion

- internal shielding of the blades : injection at the leading edge of a special resin with Nanostrength® (ARKEMA product : high kinetic energy absorption capacity) => See the page LEADING EDGE PROTECTION

- the epoxy resin is including a high resistance to UV additive (UVA and UVB). Blades are polished with a perfect finition.

- unique ref number on each blade for traceability (RFID chip inside)

 

tresse carbon carbon braid tresse carbon carbone braid

special high-resistance carbon braid, with thousnads of carbon wires

 

 

cannelure hélice EPROPS NGDinterieur pale e-props carbonepied de pale hélice e-props ng-dtor acier pied de pale hélice E-PROPS NG-D

foam core with internal spar, titanium ring

 

 

e-props serial number on the blade foot

 

 

HELICES E-PROPS HI-TECH CARBON PROPELLERS

 

 

HUB

- full carbon + high temperature epoxy resin

- blades and hubs are made in the samed material : no problems of interference, no galvaic corrosion

- Nord-Lock washers secure bolted joints

 

moyeu e-props hub

carbon hub with aluminium flange

 

 

modélisation moyeux carbone e-props simulation sofflerie numérique

analyzsis of the hub

 

 

PROCESS

Blades and Hub : RTM (Resin Transfer Molding) manufacturing. This process is used by Airbus for some critical carbon parts on the liner aircraft. It is realized by following a strict cycle of temperatures. The baking of carbon parts allows to improve certain properties, in particular mechanical and of resistance under hot conditions (carbon hubs : max T° resistance = 120°C for reduced engines and 170°C for direct drive engines).

The workshop has two rooms : a medium-temperature / small steam room capacity and a high-temperature / big steam room capacity, both managed by computer.

 

 

hélice e-props carbone pour ULM et paramoteurs

 

 

 

To assure a strict quality control and the reproducibility of the production, the components are exactly weighed very throughout the manufacturing. 15 weighings are necessary for a propeller for Ultralights / Aircraft.

 

E-PROPS ensures the production monitoring by RFID and KANBAN method. These methods and tools optimize the manufacturing quality, reassure and fluidify the supplies, allow the real-time follow-up of the production process, the traceability of all the manufacturing steps, and offer a set of successful and reliable indicators.

 

 

E-PROPS suivi RFIDE-PROPS suivi KANBAN

E-PROPS : production monitoring by RFID and KANBAN

 

 

The company is using 12 CNC machining centres, including one innovative custom-made 8-axis centre with laser scanner and a professional 3D printer.

 

 

centre usinage TRM-8 scanner laser E-Props

8-axis machining centre with laser scanner

 

 

3-blades propeller carbon for rotax 912 s pusher weight 2,9 kg E-PROPS

Excalibur 3 - 130 propeller diameter 172 cm - weight = 2,9 kg with flange

 

 

- Centrifugal load test of a carbon E-Props propeller (propeller for direct drive engine)

Results : safety coefficient = 7,2. The system carbon hub + blade can hold 6 times the maximal load during 1 hour without any damages (EASA CS-P asks only 2 times for certified propellers).

 

 

 

high efficiency propellers

 

 

 

série de pales NG-D

 

 

carbone e-props helices propellers

 

E-PROPS HI-TECH CARBON PROPELLERS