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E-PROPS : In-Flight Variable Pitch
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

E-PROPS : Data Sheet


✗  HI-TECH Propellers for AIRCRAFT
✗  The world's lightest propellers
✗  Very strong : 100% carbon, very high fibers ratio, RTM Manufacturing, leading edge protection
✗  Many models for Rotax serie 9, tractor and pusher
✗  Made in France since 2008
✗  E-PROPS production : 30.000 blades / year
✗  Propellers sold in more than 80 countries

E-PROPS propeller for aviation

DATA SHEET

1 - Design
2 - E-PROPS range for AIRCRAFT
3 - The lightest propellers
4 - Blades
5 - Blade's foot
6 - Hubs
7 - Spinners
8 - Finish
9 - Leading Edge Protection
10 - Moment of Inertia
11 - Balancing
12 - Quality / Certification / Life limitation
13 - Repairs / Spare Blades
14 - Mechanical Strength / Load Tests
15 - Tightening torque
16 - Max RPM
17 - Maintenance
18 - Satisfied or Your Money Back during 6 Months
19 - Pilots Feedback
20 - 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 E-PROPS company.
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 called (LmPTR©).
- A manufacturing process which allows a very lightweight.
- Specific E-PROPS designs with high CL profiles. E-PROPS propellers design, see : DESIGN and TESTS
- Propellers with high ESR effect : ground adjustable pitch propellers which behaviour is very near from the behaviour of a variable pitch propeller.

2- E-PROPS range for AIRCRAFT


E-PROPS has developed many models for ROTAX serie 9 engines, tractor (DURANDAL range) and pusher (EXCALIBUR range).
Thousands of those propellers equip more than 350 different models of ultralights and aircraft, all over the world.
E-PROPS has not one “universal” blade, that can be cutted as necessary, and which are never very well adapted.
Every E-PROPS propeller is designed and tested for a specific engine, its reducer if any, the diameter, the speed range of the aircraft, the special configuration... All E-PROPS blades have different chords, diameters and profiles, and are produced by specific molds. E-PROPS proposes more than 185 blades geometries, and as result, exceptional performances for each set of aircraft / engine / propeller.
The DURANDAL and EXCALIBUR ranges have been designed for engines with reducers. It is strictly forbidden to use them on a direct drive engine.

3- The lightest propellers


A 3-blade diameter 170 cm ground adjustable pitch which weights only 2,6 kg !
E-PROPS are the world's lightest propellers.
The advantages of a light propeller, see here : ULTRA-LIGHT PROPELLERS

4- Blades


The E-PROPS are fully made in carbon.
Optimum use of carbon fibers braid and epoxy resin to obtain ultra-light and very strong blades.
HCF system (Helical Continuous Fibers : Fibres Continues Hélicoïdales), specifically designed by E-PROPS.
Very high fibers ratio : 63%
See the page E-PROPS MANUFACTURING

5- Blade's feet


Carbon fiber rolled up on a titanium ring, for an exceptional strength.
No risk of galvanic corrosion because no metal part.

6- Hubs


Hubs made in full carbon + epoxy resin
Ground adjustable pitch system
Compact hub for minimum drag and to optimize engine's cooling
Innovative system to replace the usual spacers in aluminium : EXTENED HUBS

7- Spinners


The E-PROPS spinners are in carbon, very strong and very light.
2 types : standard spinners and mini-spinners
See here : E-PROPS SPINNERS

8- Finish


Finish with shiny polish.
The carbon braid remains visible; each blade is unique.
No paint, varnish or gel-coat, because those products are very polluting.
The E-PROPS company is committed in an eco-management approach and proscribes this type of products.
In addition, paints, varnish and gel-coat do not allow to easily repair the blades in case of impact.

9- Leading Edge Protection


All E-PROPS have an internal shielding in the blades : injection at the leading edge of a special resin with Nanostrength® additive shock.
In special cases (as seaplanes), 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

10- Moment of Inertia


The E-PROPS, ultra-lightn, strictly respect the MOI limitations given the engines manufacturers.
Moment of inertia of each model calculated then verified on the tests bench.
See details here : MOMENT OF INERTIA

11- Balancing


The E-PROPS propellers are precisely balanced at workshop.
The team is using an electronic bench to balance the propellers, with oscilloscopes.
More information here : BALANCING

12- Quality / Certification / Life Limitation


The E-Props propellers are designed, manufactured and tested to meet the requirements of the aeronautical standards.
They are ASTM F2506-13 certified (lSA standards).
No life limitation. MTBO recommended at 2.000 hours.
Quality and safety are ongoing concerns for the E-PROPS company, throughout the design, procurement, manufacturing, testing and marketing of all its products.
More information on page QUALITY

13- Repairs / Spare Blade


Small impacts can be easily repaired (epoxy resin without paint, varnish or gel-coat).
A repair kit is available in this e-shop.
See details here REPAIRS
By E-PROPS, it is possible to change only one blade.
See explanations on the page : SPARE BLADES

14- Mechanical Strength / Tests


E-PROPS is doing many tests on all the propellers models.
Example, centrifugal load : break at 11.000 tonnes, safety coefficient : 7,2 Carbon propeller can hold 6 times the maximal load during 1 hour without any damages.
See here TESTS ON GROUND

15- Tightening torque


The screws tightening must be done with a torque wrench
Torque value is indicated in the Manual given with each propeller.
It is very important to follow the value of each model.

16- Max RPM


Max RPM, engines ROTAX serie 9 :
2.600 RPM (measured at propeller = engine max RPM / reducer ratio.).

17- Maintenance


Maintenance is simple :
- Before each flight: visual inspection of the propeller (particularly check the leading edge) and check the screws tightening.
- Every 50 hours of flight and/or every 3 months : check of the screws tightening.
- EXCALIBUR-6 model => every 25 hours of flight and/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.

18- Satisfied ou Your Money Back during 6 Months


E-PROPS is the only propellers manufacturer in the world to propose a guarantee SATISFIED or YOUR MONEY BACK DURING 6 MONTHS to the customers.

19- Avis Pilotes


Our customers are our best ambassadors!
See here the PILOTS FEEDBACK

20- Manual


=> INSTRUCTION and SERVICE MANUAL ref HEP-PRS-MME-2018A-04R dated 21-08-2018



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