Here's a picture of my four-pole monopole to illustrate the concept: The coils are positioned so that two coils are always firing in-between the travel of one magnet to the next, from the POV of a stator coil. In other words, with eight magnets around a rotor, you normally have 45 degrees of travel between magnets. But by putting a pair of coils (or a single coil for that matter) at 22.5 degrees, you double the kick that the rotor would normally get from a standard configuration. By extending this concept you can develop even more torque. You might want to draw your rotor/stator configuration with the magnets aligned with various coils to get an idea of exactly when things will be firing to know what to expect with that configuration. 
Of course you can get good torque from a properly built window motor, but where's the challenge in that?

Of course you can get good torque from a properly built window motor, but where's the challenge in that?

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