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I'm thinking that sure, it'd increase back pressure and actually hurt performance during use, but not enough to damage anything...
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vs
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I've read in other gas engines where exhaust water injection is used to create a reflective wave which dynamically "tunes" the exhaust system (via exhaust gas scavenging) to improve torque and horsepower at rpm bands other than what the original system was designed for.
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Did anyone bring popcorn?
Steam for lift
Hydrogen gas has a standardized lift of 11.19 N/m3. Helium has 10.36 N/m3 lift, while hot air varies from 2.7 to 3.2N/m3. Pure steam has 6.26 N/m3
Find an article on the relative merits of the various lifting gases, including losers like methane and ammonia at
Steam Balloon JBFA Article
'Steam' power
The world's tiniest [theoretical] engine uses water as a working fluid, but without the phase change:
https://www.washingtonpost.com/news/...allest-engine/
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The University of Cambridge engine needs a bit of refining before it can be hitched to a nanoscale object. “Our main challenge is how to build a device that harnesses the forces for motion in one direction – a bit like a piston on a steam engine,” Baumberg wrote. “Currently the force just expands and contracts in all directions.” But a few steps down the line — once the directional problem is solved — he envisions “tiny nanomachines that can walk around, controlled by beams of light.”
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