http://knol.google.com/k/alex-belov/the-concept-of-wave-propulsion-system/1xmqm1l0s4ys/24# This propulsion concept use ideal models like:1. The wave source produce pure directional waves which transfer momentum only in particular direction.
2. The wave receivers completely utilize directional wave and don't reflect secondary waves back.
3. The known wave which can transfer momentum without mass - photon.The figure1 shows first concept of wave propulsion system. 
The wave doesn't transfer mass. However, the wave may transfer momentum. Base on Doppler effect, the rotated wave receivers utilize waves with different wavelength. Base on this wavelength difference the receivers will utilize momentum of wave with different values. This momentum difference let system move in particular direction.
The figure 2 shows second concept of wave propulsion system. 
Here's wave path through a curve channel and hits wave receivers into one direction.
The utilized by receivers momentums of waves let system moves into particular direction.
