The E-Props Company
E-PROPS DETAILS
The E-PROPS Company
195, Route de l'Aviation
ZI Aérodrome de Sisteron
04200 VAUMEILH - France

The best way to reach our team is by email : helices@e-props.fr


E-PROPS : Fixed Pitch Propellers for engines 7-50 kW dia 115 to 160 cm.
Traction / Torque Curves



✗  Hi-Tech full carbon propellers, fixed pitch
✗  The lightest propellers in the world : up to less than 420 gr for a 2-blade propeller !
✗  For gear-drive engines and electric engines from 7 to 50 kW
✗  Each model available in : 2-, 3-, 4- and 6- blades
✗  Diameters : from 115 cm to 160 cm, each 5 cm
✗  Models each 0,5° pitch
✗  It means 528 different blades geometries
✗  Tractor and pusher configurations
✗  Available in both rotation senses : CW and CCW


1 - Thrust and torque curves
2 - How to choose an E-Props fixed pitch propeller for multicopter or drone ?
3 - Propellers pitch


1 - Thrust and torque curves


By clicking on the red button "CURVES" below, a PDF file will display the thrust and torque curves for each of the 528 E-Props fixed pitch propeller blade geometries.

E-PROPS
click here to open PDF files



Please note that the reference of the propellers do not give any indication on the pitch of the E-Props propellers.
The numbers : 32 / 33 / 34 / 35 / 52 / 53 / 54 / 55 / 72 / 73 / 74 / 75 / 76 / 77... are only internal E-Props reference (ref of the molds of the blades).
We do not give information on "pitch": see why here => Propellers pitch
"T" is for Three-blade
"Q" is for Quadri-blade
"H" is for Hexa-blade
"No letter" is for a 2-blade model.


2 - How to choose an E-Props fixed pitch propeller for drone ?


Reminder :
formula power

E-Props fixed pitch propellers for electric motors

1/ If the electric motor has not already been chosen
- The mass of the multicopter or the drone is known, so the maximum traction required is known.
- In the E-Props catalog, there are many fixed pitch propellers that allow to obtain this max traction, but not all with the same torque requirement.

2/ If the electric motor has already been chosen
- The motor has a maximum torque (defined by the electric motor + controller + battery) and a rotation speed at which it is possible to have this maximum torque.
- So at a given point "max torque - max rpm" [i.e. = max power], we are looking for a propeller which, at this max torque and this max rpm, will give the necessary traction.
- If you need less traction, then you can choose a propeller that absorbs less torque, and in this case, the engine will consume less.

EPROPS PAS FIXE pour DRONES UAV
example of thrust and torque curves
here 14 different blade geometries of 115 cm diameter



3 - Propellers pitch


The power absorbed by a propeller depends from:
- its diameter
- its number of blades
- the width of its blades (chord)
- the profile of its blades
and the pitch of its blades

As soon as you change the chord and/or the profile of the blades, it becomes impossible to compare the pitches between one propeller model and another.

This is why at E-Props we do not specify a pitch value for our different models.

Moreover, what pitch should we indicate ?
- the one of the zero lift incidence ?
- that of the chord ?
- that of the lower surface ?
And also, at what radius ?

Each manufacturer has its own method.
None of them are the same.
=> therefore giving a pitch value does not allow any comparison.




Languages
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Fixed Props for engines 7-50 kW dia 115 to 160 cm
Adjustable Props for engines 50-115 kW dia 145 to 205 cm