Styx said:
YOu are going to get shoot-throughs with that arrangement unless you have interlock logic
Yes, that problem exists with any implementation regardless of the number of transistors or whether they're MOSFET or bipolar.
The problem is lessened due to the presence of the body diodes in a functional FWB implementation- the diodes will catch the turn-off spikes and continue to function as a rectifier, so prematurely turning off one transistor to make a clearance before turning on the other leg will not have very negative consequences.
From what I can tell, a hand-cranked generator will not be a really high frequency job so generous latentcies between turning off one and turning on another would not constitute a whole lot of the waveform. Switching losses from charging and discharging gates are also not very big.