Adjustable pitch propellers, for engines 50 to 180 kW

Description

• Ground adjustable pitch carbon propellers
• For engines from 50 to 180 kW
• Ultra-light propellers, full Carbon with Titanium leading edge protection
• Many models in 2, 3, 4 and 5 blades
• Both senses of rotation: CW and CCW
• Tractor and pusher configurations, different chord widths and blade profiles
• CW rotation: 47 to 82 inch, each 2 inch (120 to 209 cm, each 5 cm)
• CCW rotation: 47 to 75 inch, each 2 inch (120 to 190 cm, each 5 cm)

If a drone project requires propellers of the same diameter in opposite rotation directions (CW and CCW), the maximum diameter currently offered is 74.8 inch.

1- Traction & torque curves

2— Designed for each engine

Each E-Props adjustable pitch propeller is designed and developed for:

• the characteristics of the motor and its gearbox (if applicable)
• engine cooling and air flow study
• a defined aircraft speed range
• the aircraft configuration: tractor, pusher, high wings, low wings, wing/fuselage interactions
• the use of the aircraft: speed, cruise, towing, STOL... and the desired performance

All models for engines from 50 to 180 kW have blades equipped with Titanium leading edge protection.
E-PROPS has also developed an exclusive system of spacers to move the propeller away from the engine fairing: the carbon ESU spacer — 13 times lighter than an aluminum spacer (1.5 g/mm vs 20 g/mm), available in 38 lengths, and integrated into the hub (no extra screws or bolts, avoiding vibrations).
Full carbon spinners are also available, in 15 diameters.

3— Available models

Ground adjustable pitch propellers, carbon with Titanium leading edge protection, drilling 6M8d101.6L13 or 6M8d100.

2-blade

3-blade

4-blade

5-blade

4— Ultra-light propellers

E-PROPS are by far the lightest propellers in the world. An ultra-light propeller has many advantages:

• Any weight gain is very important — particularly true for UAV
• A lighter propeller increases flying autonomy
• Better powertrain operation: better engine performance across the rpm range, better linearity, less jerking when starting/stopping, less stress on the gearbox, fewer vibrations
• Helps respect the engine's maximum Moment of Inertia
• More reactive: direct piloting, no time lag, faster stopping, less stored kinetic energy — less damage in case of impact

5— Tightening torque

Tightening the fixing screws must be carried out carefully with a torque wrench, respecting exactly the values in the manual supplied with each propeller.

6— Max RPM & max power

Power (Watt) = torque (N·m) × rotation speed (rad/s)

To calculate the max power of a propeller model, you need the maximum torque absorbed by the blades and hub, and the maximum rotational speed of the propeller.

Example: for Rotax 9-series engines, maximum rotation speed at the propeller is 2,600 rpm (272.27 rad/s), measured as max engine speed / reduction ratio.

This range suits gear-drive engines and electric motors — never mount these models on direct-drive engines (except electric).

7— Maintenance

• Before each flight: visual inspection (particularly the leading edge) and check of screw tightening
• Every 100 flight hours and/or every 6 months: check screw tightening
• Cleaning: a sponge with soapy water, or a window-cleaning product

This range of propellers has a TBO of 4,000 hours.