UFO UpDates
A mailing list for the study of UFO-related phenomena
'Its All Here In Black & White'
Location: UFOUpDatesList.Com > 1998 > Jul > Jul 28

Re: They Drop Like a Rock!

From: Terry Blanton <commengr@bellsouth.net>
Date: Tue, 28 Jul 1998 22:57:38 -0700
Fwd Date: Tue, 28 Jul 1998 23:41:06 -0400
Subject: Re: They Drop Like a Rock!

Mark LeCuyer wrote:

>From: Mark LeCuyer <randydan@wavetech.net>
>To: "UFO UpDates Toronto" <updates@globalserve.net>
>Subject: They Drop Like a Rock!
>Date: Tue, 28 Jul 1998 12:46:17 -0500

>Hello Everyone:)

>Can anyone enlighten me as to why two of the military jet crashes
>I've seen in the news over the last two years have video of them
>dropping straight down from the sky like a rock?

It's called a "flat spin" and an excellent example exists in the
movie "Top Gun". It is basically a stall and can have several
causes. All airplanes must have good laminar flow of air across
the wing surfaces in order to maintain lift. If something
suddenly disturbs this flow, lift disappears and the plane drops
like a rock.

Causes vary. The most common cause is too high an angle of
attack for conditions. In other words, the craft tries to climb
too rapidly. The flow of air over the wing is interrupted and
the plane stalls. High performance aircraft usually have the
most difficulty recovering from a stall. Their wings are
designed to create minimum drag during flight instead of maximum
lift. Some aircraft are practically immune to stalls. The best
plane to learn to fly in is one with the wings over the fuselage
of the craft. They tend to float like a leaf to the ground
instead of an unstable spin. This motion makes it easy to
recover from a stall.

Another common cause is "backwash" from another craft. Wing tips
create vortices which can disturb laminar flow on a following
craft. This is one reason takeoffs have a minimum spacing at
airports. Time is allowed for the wing vortex of the previous
plane to dissipate or propagate.

Nothing mysterious, I'm afraid.

Terry