Response.
Hi, Tom.
I don't give a s**t, Tom, what you
think of my sanity.
Thrust is thrust is thrust!
Whether it's by combustion, or
non-reactive gas expulsion [cold or hot].
The scientific principal for it is sound. I'm keeping my cards close to my chest, but NASA engineers have recently discovered the principle...
[a back issue of "New Scientist" magazine explains what they found]
Yes, I said 300 seconds, Tom,
doubled from 150 seconds [thereabouts].
How, you may ask, without violating the laws of physics/or chemistry?
HINT!
Read that back issue of New "Scientist" magazine.
Jake