Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!att!cbnews!military
From: jeff@aplcomm.jhuapl.edu (JEFF NANIS )
Newsgroups: sci.military
Subject: Re: Soviet Wing-in-Ground Effect Machine?
Summary: Power Augmented Ram
Keywords: WIG, PAR
Message-ID: <1990Jul25.004922.7605@cbnews.att.com>
Date: 25 Jul 90 00:49:22 GMT
References: <1990Jul16.030959.5705@cbnews.att.com> <1990Jul23.203523.8039@cbnews.att.com>
Sender: military@cbnews.att.com (William B. Thacker)
Organization: JHU/APL, Laurel, MD
Lines: 31
Approved: military@att.att.com



From: jeff@aplcomm.jhuapl.edu (JEFF NANIS )
In article <1990Jul23.203523.8039@cbnews.att.com> dps@otter.hpl.hp.com (Duncan Smith) writes:

>From: dps@otter.hpl.hp.com (Duncan Smith)

>/ otter:sci.military / tek@CS.UCLA.EDU (Ted Kim (Random Dude)) /  5:09 am  Jul 18, 1990 /
>>The other model had what looked like a row of jet engines
>>mounted on a low wing in front. The thrust from the engines was
>>supposed to blow over the main wing to provide more lift.

>This sounds to me like trying to blow a sailboat along with a fan
>mounted on the stern, pointing forward ... The wing could never rise
>through the engines' jetstreams, could it? Am I missing something here?
>I've heard of diverted thrust (blown flaps?), as in the YC-14, but this 
>doesn't seem to be the same principle.

	A normal WIG works by using low aspect ratio wings and low cruise
altitude to fly in "ground effect", essentially riding on the cushion of
air created by the forward motion of the wings. There are problems in
getting fast enough to create that cushion, however, especially with
large craft. Somw WIGs make use of the "Power Augmented Ram" (PAR) mode
to blow air (such as engine exhaust) below the wings to create the initial 
cushion and then slowly vector the thrust rearwards to impart forward 
motion.
-- 
--
Jeff Nanis			"If I told you,	I'd have to kill you."	

	Not an official opinion which might get me put in jail.