E-PROPS HI-TECH CARBON PROPELLERS



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NG-D propellers logo

 

 

light carbon propellers - adjustable pitch

 

for all paramotors

 

 

Those propellers are designed with the inhouse program LmPTR©, then manufactured and tested for quite all engines for paramotors. This kind of propellers, with adjustable pitch (pre-adjustment done in E-PROPS workshop), is interesting for engines manufacturers, paramotors manufacturers, champions, and pilots who are looking for the best pitch. For pilots who are looking for simplicity, the PLUG'n'FLY propellers are perfect.

 

 

hélices NG-D pour paramoteurs

 

video

NG-D propellers presentation

 

 

Description :

- weight : about 750 gr [for a 2-blades NG-D diameter 125 cm]

- moment of inertia : about 500 kg.cm²[for a 2-blades NG-D diameter 125 cm]

- blades 100% carbon (E-Props are the only propellers full carbon on the paramotor market)

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

- propeller's pitch is adjusted at workshop for each engine. If wanted, the customer can also adjust the pitch himself.

- NG-D propellers have some dihedral's degrees

- traceability : n# of reference + serial number on each hub and each blade (quality control; quick replacement of one blade possible)

- propellers designed and manufactured in France, Provence, Sisteron (04)

- each propeller is tested on a test bench before delivery : see video tests before shipment

- clockwise and counterclockwise models

 

NG-D propellers have been developped for quite all engines of paramotors, in 2-, 3- and 4- blades.

 

 

NG-D hélices

NG-D kit + screws

 

NG-D hélices pour paramoteurs

 

 

SPECIAL HUB in DENSIFIED WOOD / RESIN (used only for the NG-D range) :

- this hub is manufactured on a CNC machine

- design : rectangular or round, depending on the propellers models and the holes of the reducer

- thickness : 60 mm (for all designs)

- material : densified wood + epoxy resin (the wood is there as a matrix)

This material has the same mechanical characteristics as some aluminium alloys, and weighs 50 percent less that aluminium.

Mechanical strength = 277 MPa [against 280 MPa for aluminium ref 2017].

It is used for example to manufacture the insolators of the raiways, because it has a high resistance in strength, a high dimensional stability, a very strong resistance to products as oil or fuel, and also a very good weather resistance.

In the NG-D propeller, the hub is more strong than the carbon of the blade.

The E-PROPS company is using this material since 2008.

 

=> The interests of this material against aluminium : as strong as aluminium and two time lighter, easy to manufacture, cheaper.

             

At this day (2017-11-19), more than 1850 NG-D propellers are flying all over the world, on paramotors, UAV and small ultralights.

 

 

Advantages of a NG-D propeller :

VERY LIGHT

- about 750 gr for a 125 cm diameter

- more resistant propeller => faster acceleration and deceleration of the engine (the propeller is more reactive, it stops much more fast, that is 2 x fewer risks of break in case of shock in the propeller), 2 x less stored kinetic energy, thus 2 x fewer damages in case of impact.
- Comfort increased for the pilot = > 2 x less mass propeller on the back, 2 x fewer gyroscopic efforts, less couple
- Better functioning of the engine = > 2 x fewer constraints on the reducer, fewer vibrations due to the functioning propeller

 

DISASSEMBLED

- in several parts : blades and hub

- interesting for storage and transport

- easy to assemble and disassemble

- simple replacement of one blade

 

GROUND ADJUSTABLE PITCH

- Pitch adjusted in worshop for each engine - reducer by splines, with possibility for the customer to change the pitch if necessary

 

 

 

This NG-D propeller is interesting because :

- ground adjustable pitch : not common on paramotors propellers, but very usefull

- simple replacement of one blade : all NG-D blades have their own serial number, and can be easily replaced

 

 

 

 

pale hélice E-PROPS NG-D

 

    Assembly of the blades

[a] Get both blades, both parts of the hub and screws together. The material of the hub is very dense and does not require any plate. Medium washers are included in the kit to put under the screws' heads.

[b] Put the blades in the hub, and the whole propeller on the reducer's flange.

[c] Close the hub and make a first very slow torque of the screws.

[d] Locate the male and female sides. Be careful to put them carefully the male in the female, or the pitch adjustment would not be good and it could be possible to have vibrations.

[e] Torque the screws as mentionned in the manual

 

If you have vibrations, the problem is coming from the positionning of the male side in the female side. Please do it again carefully.

 

The E-PROPS are very well balanced in the assembly line. Please see BALANCING PAGE.

 

 

NG-D montage assembly

 

 

 

 

 

 

 

E-PROPS HI-TECH CARBON PROPELLERS