You have now entered the realm of rocket science and have reinvented an ancient steam engine.
Aeolipile - Wikipedia, the free encyclopedia
I would think that the design of the nozzles would be critical to produce the maximum thrust and it would help to streamline the elbows to reduce aero drag since they will be spinning at alternator rpm. Also, because it is a reaction engine dependent on the mass expelled to produce thrust, these supposedly consume a lot of steam vs. a positive-displacement engine, so plan on having a lot available.