✗ 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
✗ E-PROPS production : 30.000 blades / year
✗ Propellers sold in more than 80 countries
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
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
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.
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
The E-PROPS spinners are in carbon, very strong and very light.
2 types : standard spinners and mini-spinners
See here : E-PROPS SPINNERS
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
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 :
(measured at propeller = engine max RPM / reducer ratio.).
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
=> INSTRUCTION and SERVICE MANUAL ref HEP-PRS-MME-2018A-04R dated 21-08-2018