posted on Oct, 13 2014 @ 02:15 AM
a reply to: Domo1
As far as I know, there are no engines which could perform with the characteristics of both a high, and a low bypass engine. However, that is not to
say that such things are not possible with the technology we have available as a species, far from it.
I would have thought that such a thing might be perfectly possible in the next little while. The main issue however, is that in order to have the
characteristics of both, the actual physical size of the engine would have to remain large, and the air flow through it would have to be regulated
down in flight by some means, in order to access the low bypass behaviour familiar to combat pilots.
This would however, present a problem. You see, jet engines are heavy, and large jet engines are heavier, obviously, than small ones. There are
therefore, two main problems. One, if you could reduce the airflow through the high bypass fan, and make your engine behave like a low bypass one,
that might mean that there simply would not be enough power to keep the massive engine, and the airframe, aloft in stable flight. Also, an aircraft
with a large jet engine, has a larger target profile, and what with the obsession with stealth aircraft that defence manufacturing firms have, that
would not be something I would expect them to accept.
I think if we reach a point where we can achieve the advantages of both a high, and a low bypass engine, it will be only when we have discarded fuel
burning engines completely, and moved on to other methods. Perhaps the next leap in avionics will not be with regard to any kind of a jet at all!