[AR] Re: to the stars, soon
- From: Norman Yarvin <yarvin@xxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Sat, 2 Apr 2016 15:35:21 -0400
On Sat, Apr 02, 2016 at 12:58:00PM -0400, Dave McMillan wrote:
Well, I can't speak to turbojets, specifically, but when I was
working on thrust reversers (production equipment, not the reversers
themselves) for high-bypass turbofans at AirBus, the (layman's)
explanation that I was given was that 70-80% of the thrust of a turbofan
is essentially the primary intake fan acting like a propellor, and only
20-30% was "hot gas" thrust from the combustor stage, and the outer cold
flow was what the thrust reverse interacted with. The "hot" part of the
engine primarily contributed to thrust by providing the energy to keep
the front fans turning.
That's all correct, but it's different from the practice of
attributing "thrust" to the intake of a ramjet, which was what was at
issue here.
--
Norman Yarvin
http://yarchive.net/blog
Other related posts:
- » [AR] to the stars, soon- John Dom
- » [AR] Re: to the stars, soon- Uwe Klein
- » [AR] Re: to the stars, soon- Henry Spencer
- » [AR] Re: to the stars, soon- Robert Steinke
- » [AR] Re: to the stars, soon- Henry Spencer
- » [AR] Re: to the stars, soon- Doug Jones
- » [AR] Re: to the stars, soon- Henry Spencer
- » [AR] Re: to the stars, soon- David Weinshenker
- » [AR] Re: to the stars, soon- Jonathan Goff
- » [AR] Re: to the stars, soon- Henry Spencer
- » [AR] Re: to the stars, soon- George Herbert
- » [AR] Re: to the stars, soon- Uwe Klein
- » [AR] Re: to the stars, soon- Troy Prideaux
- » [AR] Re: to the stars, soon- Paul Mueller
- » [AR] Re: to the stars, soon- Robert Steinke
- » [AR] Re: to the stars, soon- Henry Vanderbilt
- » [AR] Re: to the stars, soon- Norman Yarvin
- » [AR] Re: to the stars, soon- Henry Spencer
- » [AR] Re: to the stars, soon- David Gregory
- » [AR] Re: to the stars, soon- David Gregory
- » [AR] Re: to the stars, soon- Dave McMillan
- » [AR] Re: to the stars, soon - Norman Yarvin
- » [AR] Re: to the stars, soon- Paul Mueller
- » [AR] Re: to the stars, soon- David Weinshenker
- » [AR] Re: to the stars, soon- David Summers
- » [AR] Re: to the stars, soon- rebelwithoutajob