In progress
Contact information
e-Traction Europe BVVissenstraat 36
324AL Apeldoorn
T: +31 55 521 1111
F: +31 55 522 2366
@: info@e-Traction.eu
Project Whisper
The city bus technology of the future

The first Whisper bus equiped with TheWheelSM500/3 motors
e-Traction implemented the e-Traction system with TheWheel SM500/3 motors in standard city buses. This has several advantages for public city transport.
Advantages of the Whisper
- The Whisper is 90% more silent than conventional city buses
- A reduction of 50% in the emission
- A reduced fuel consumption of 50%
Phase of Project - 65% completion
In close cooperation with community Apeldoorn, Veolia, province of Gelderland, the Dutch government and Eneco - 5 buses are now being converted to Whisper buses. The project started December 2008 and is now in full swing.
The first bus has been delivered and is in daily operation. See also the news item about the first Whisper bus. Second bus is being finished and will soon be delivered.
What makes the Whisper a revolutionary bus concept
As with any vehicle equipped by e-Traction, TheWheel in-wheel motors are installed as traction system. Using this technology, an enormous energy consumption reduction is already achieved. For more information, see our TheWheel overview section
Batteries
The next step in transition is adding an energy buffer. As elaborated in the e-Traction system section, Li-Ion batteries are installed. The capacity of this buffer allows zero-emission electric driving up to one hour of operation.
Generator
An well designed buffer allows the use of a smaller power source. Every Whisper bus is equipped with a small diesel generator. Its size is comparable with a small SUV motor - as is its fuel consumption.
