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E-PROPS DETAILS
The E-PROPS PROPELLERS Company
ZI aerodrome Sisteron
04200 VAUMEILH - France
Phone : +33 4 92 34 00 00
Phone reception opened from Monday to Friday
From 9 to 12 a.m and 2 to 4 p.m.
Email : helices@e-props.fr

PLUG'n'FLY : top of the range propellers


✗  PLUG'n'FLY = HI-TECH propellers for paramotors, paratrikes, powered paragliding (ppg)
✗  The world's lightest propellers : less than 500 gr for a 2-blade !
✗  Very strong : 100% carbon, very high fibers ratio, HCF process, leading edge protection
✗  For reduction drive engines and electric engines from 10 to 50 kW
✗  Thousands of models : 2-blade, 3-blade, 4-blade and 6-blade models
✗  Diameters : from 115 cm to 160 cm (soon up to 180 cm), each 5 cm
✗  Models each 0,5° pitch and in both rotation senses (CW and CCW)
✗  ASTM F2506-13 certified
✗  Made in France since 2008
✗  E-PROPS production : 30.000 blades / year
✗  Propellers sold in more than 80 countries

PLUG PROPS

PLUG'n'FLY TECHNICAL DATA

01- Design
02- PLUG'n'FLY models
03- Weight
04- Blades
05- Blade's foot
06- Finish
07- Tips
08- Leading edge protection
09- Moment of Inertia
10- Balancing
11- Quality
12- Repair
13- Spare Blade
14- Mechanical Strength / Load Tests
15- Tracking / Dynamic gap / Gap from the frame
16- Drilling
17- Tightening torque
18- Max RPM
19- Max Power
20- Maintenance
21- Manual

WITH E-PROPS FLY SAFE !

1- Design

Propellers of 3rd generation : efficient, ultra-light, quiet and very strong.
Made in France since 2008 : see page the E-PROPS company.
Adapted diameters and blades' numbers defined according to engines and reducers.
See here the CATALOG.
The secret of their exceptional performances ?
- Extensive research of the E-PROPS design department, with many tests campaigns on wind tunnel et the development of an exceptional software (LmPTR©).
- A manufacturing process which allows a very lightweight, this a high reactivity.
- Specific E-PROPS designs with high CL profiles.
- SCIMITAR shape : more thrust, less inertia, fuel economy and noise reduction.
Informations on E-PROPS design, see page DESIGN and TESTS

2- PLUG'n'FLY models

The E-PROPS PLUG'n'FLY, 100% carbon, are the world's lightest and strongest propellers.
Those models equip all engines of paramotors :
- 2- / 3- / 4- / 6-blades
- diameters : all 5 cm, from 115 to 160 cm (and very soon, from 165 to 180 cm)
- all in CW and CCW rotation sense
- pitch all 0,5°
=> it means thousands of models
No other manufacturer in the world offers such different models for so many configurations "engine - gearbox - number of blades - diameters".
Click here to discover the CATALOG

3- Weight

Many 2-blades PLUG'n'FLY, diameters 125 cm, weight less than 500 gr !
About 30 to 60% less than competitor props.
The E-PROPS are by far the world's lightest propellers
Advantages of a light propeller, see here : ULTRA-LIGHT PROPELLERS

4- Blades

E-PROPS are the sole full carbon propellers for paramotors.
Optimum use of carbon fibers braid and epoxy resin to obtain ultra-light and very strong blades.
The HCF (Helical Continuous Fibers) process, specifically designed by E-PROPS, ensures an exceptional strength of the carbon braid (like a sock) + epoxy resin blade, from leading edge to trailing edge, from blade's foot to tip.
Manufacturing process : Resin Transfer Molding (RTM).
Foam core (D-Box).
UV High Resistance epoxy resin
Very high carbon fiber ratio : 63%
See page MANUFACTURING

5- Blade's foot

The PLUG'n'FLY models are fixed pitch.
The blades are in two or three sectionnable parts, very simple to assembly.
The assembly is correct when the stickers are on the same side.
Thickness of the blade's feet (PLUG'n'FLY models) :
- 28 mm for the classic range
- 38 mm for the Scimitar range

6- Finish

Finish with shiny polish.
The carbon braid remains visible; each blade is unique.
No paint, no varnish, no gel-coat, because those finishes are very polluting, and the E-PROPS company respects an approach of eco-management.
Furthermore, paints, varnishes and gel-coats do not allow to easily and properly repair the blades, in case of impacts.

7- Tips

E-PROPS has made extensive research on the blades tips, with many tests on different configurations : rounded, cut with angles, with upper or lower winglets...
The best performances and the lower noise are reached with a straight cut tip.
All other configurations are for marketing.
See here : TIPS

8- Leading edge protection

All PLUG'n'FLY have an internal shielding in the blades : injection at the leading edge of a special resin with Nanostrength® additive shock.
In special cases (as barefoot flights), it is strongly recommended to an extra protection on the blades leading edge, in order to reinforce it, with a polyurethane protection tape used on certified helicopter rotor blades.
See here : LEADING EDGE PROTECTION

9- Moment of Inertia

Strict respect of the MOI limitations given the engines manufacturers.
Moment of inertia of each model calculated then verified on the tests bench.
For example, MOI about 500 kg.cm² for a 125 cm diameter PLUG model
See details here : MOMENT OF INERTIA

10- Balancing

The E-PROPS propellers are precisely balanced at workshop.
The team is using an electronic bench to balance the propellers, with oscilloscopes.
Please note : the blades do not necessarily have the same weight, but must have the same static moment to be well-balanced.
See explanations : BALANCING

11- Quality

The E-Props propellers are designed, manufactured and tested to meet the requirements of the aeronautical standards.
Quality and safety are ongoing concerns for the E-PROPS company, throughout the design, procurement, manufacturing, testing and marketing of all its products.
See page QUALITY

12- Repairs

Small impacts can be easily repaired (epoxy resin without paint, varnish or gel-coat).
If an incident or a shock require an important repair, this one must be realized by HELICES E-PROPS or an agreed repairing center.
A repair kit is available in this e-shop.
See details on this page REPAIRS

13- Spare Blade

At E-PROPS, it is possible to change only one blade.
Traceability is very important at E-PROPS :
- A RFID chip is inserted in each blade, for technical monitoring.
- Model reference on each blade.
- Unique serial number on each blade.
With this serial number, the E-PROPS team can make a new blade, well-balanced with the remaining good blade.
See page : SPARE BLADE

14- Mechanical Strength / Load Tests

Centrifugal load tests are very important test in order to define the mechanical resistance of the propellers.
All E-PROPS propellers are tested to see how they resist at centrifugal load test.
See here E-PROPS load tests

15- Tracking / Dynamic gap / Gap from the frame

* Max static tracking : up to 8 mm
Tracking is not important if there are no vibrations.
See page TRACKING
* Dynamic gap : up to 20 mm (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.
* Gap from the frame : it is recommended to part the propeller from the cage of minimum 40 mm.

16- Drilling

The PLUG'n'FLY drilling paterns are made to be adapted to each engine.
See page HUB DRILLINGS
Never put a rubber spacer between the reducer and the propeller; the screws would break.

17- Tightening torque

The screws tightening must be done with a torque wrench; torque value depending on the screws :
Screws 6 mm = 8 N.m
Screws 8 mm = 16 N.m

18- Max RPM

PLUG'n'FLY max RPM is :
3.000 RPM measured at propeller = engine max RPM / reducer ratio.
More explanations, see here : REDUCER RATIO

19- Max power

The power absorbed by the propeller depends on each model.
PLUG'n'FLY are adapted only on engines with gear box : never user a PLUG'n'FLY propeller on a combustion direct drive engine (without gearbox).

20- Maintenance

Maintenance is simple :
- Before each flight: visual inspection of the propeller (particularly check the leading edge) and check the screws tightening.
- Every 25 hours of flight or every 3 months : check of the screws tightening.
Cleaning of a carbon propeller is made with a sponge, with some water with soap, or with a product for windows cleaning.

21- Manual

=> Manual of PLUG'n'FLY propellers (Nov 2018) - pdf file



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