Re: Bladeless Turbine Thermal Efficiency Limit

[temalloy]

>thomas malloy wrote:
>
>> The company promoting the design asserted
>> "Rockets, widely recognized as the most efficient 
engines, are 
>> typically propelled by steam. Based on
>>
>> Is that BS I smell? This is the first time I've heard that 
assertion, 
>> I would think that it would be quite the opposite.
>>
>>
>If you burn oxygen with hydrogen you get superheated 
water vapor. Is 
>that not steam?
>
That's not the question i intended to ask. How thermally 
efficient is a rocket engine?