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E Drive Developments

Thanks to Werner Eck being willing to freely share information and providing this write-up. The E-Lift System is by Toni Roth, a.roth@t-online.de, Tel.: 07502-3728.

Dr. Ing. Werner Eck and his partner Jochen Geiger presented their latest electric drives for paragliders and hang gliders at the 2007 German Free Flight Show in Garmisch. The prototype of this drive had been shown in Crawinkel/Germany 10 months before at the very first competition of electric driven paragliders held then.

The drive consists of a brush and gearless electric motor with up to 12.2 kW power at 2000 rpm and 3.75kg mass, motor controller, special very effective folding propeller with 1.4m diameter and up to 65 Kp thrust, different types of Li-batteries and an electronic drive-management-system.

The presentation of the ultralight drive on different types of paragliders and hang gliders has proven its high performance, and low noise level.

Even in connection wich a 15m2 speed wing the drive showed climb rates of up to 2 m/s. The Atos VR with 80kg pilot can climb up to 1200m at average climb rate of 1.8m/s with a battery charge.

German paraglider and hang glider organization DHV made noise measurements at the presentation and found out that the noise level of the electric drive is 57db at full power in 70m height against which petrol driven paragliders where measured with up to 86 db under the same conditions. To the human ear, that is perceived as being half as loud. At a distance of 150m it can hardly be heard.

Specs on the now available E-Lift System.

The new electric drive system is available for hang gliders or paragliders. Motor, controller, battery, propeller and drive management system of both drives are identical. Thrust is greater for the PPG version since speeds are slower.

For those interested in the hang glider implementation, a harness similar to the Mosquito has been designed by Toni Roth (a.roth@t-online.de).

For the powered paraglider version, listed below, contact Werner Eck (werner.eck@gmx.org) or Jochen Geiger. They are negotiating with well known international paraglider companies for preparing and marketing a production version of the ePPG.

Note that ElectricPPG.com does not sell gear, we merely report on it. What you see here is all we know. Also, the drive system is not being sold to individuals. Contact your favorite airframer to encourage adoption.

Electric Motor: PPSM - Brushless High Power Direct 10, without gearing, free of maintenance, developed by Dr. Ing. Werner Eck.

Controller: Motor Management System and Batterie Management system, developed by Geiger Engineering.

Battery: 14 cells Lithium Ion Polymer, 31Ah, fast chargeable.

Propeller: Low Noise, high efficiency, 1.4 meter (55 inches) folded model developed by Dr. Ing. W. Eck. It spins at 1900 RPM.

Thrust: Static Thrust with "StartBoost" 61.5 kp (135 lbf), continuous 52.4 kp (116 lbf). Flight Thrust at 40 km/h (24.9 mph) 33.5 kp (73.8 lbf).

Weight: 21 kg (61.7 lbs) including battery, motor and harness. HG version weighs 28 kg.

Endurance: 30 minutes in still air with standard paraglider wing.

E-Paramotor drive system is complete and ready to go. No price to individuals has been listed. The graph charts various performance values against altitude and time.

Below: an Electric Hang Glider harness. It's very similar in design to the Mosquito powered harness but rather has batteries. Performance specs are similar to the paramotor.