Date:	Tue, 10 Aug 1993 16:34:27 -1000
From:	jeffy@syrinx.umd.edu (Jeffrey C. Burka)
Message-Id: <249lrj$fq2@umd5.umd.edu>
Organization: University of Maryland at College Park
Subject: Re: Rev II stack problem solved and another question

In article <CBJy9I.Mt5@cbfsb.cb.att.com> spar@cbnewsg.cb.att.com (al.j.sparling) writes:


>This leads to a question, I do not know if this is a sign of locking
>problems, or something repeatable.  Twice in high winds, but off to the
>edge of the wind window I managed to somehow set up an oscillation in the
>stack, kites one and three rose and two and four fell , then one and
>three fell and two and four rose.  This went on for about 20 seconds.

Looks great, doesn't it?

This is definitely repeatable and is a common sight in Rev stacks.  I see it
in my 5 stack of 3' kites, as well as the 5 stack owned by the fellow I 
often fly mine with.  I've also seen it in stacks of full sized kites.

I don't remember if we decided if it was a tuning problem that allows this
to happen, and I'm not entirely sure I could tell you how to do it.  I
do know that I've done it many times in the dead center of the window.  As
I recall (I don't think I've flown my stack since last September), it involves
doing a non-inverted hover maybe 50%                                                                           up in the window.  There's a lot
of balancing involved to get it started.

Jeff
-- 
|Jeffrey C. Burka     | "When I look in the mirror, I see a little clearer/ |
|SAFH Lite [tm]       |  I am what I am and you are you too./  Do you like  |
|jeffy@syrinx.umd.edu |  what you see?  Do you like yourself?"  --N. Cherry |



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Date:	Tue, 10 Aug 1993 06:39:18 -1000
From:	spar@cbnewsg.cb.att.com (al.j.sparling)
Message-Id: <CBJy9I.Mt5@cbfsb.cb.att.com>
Organization: AT&T
Subject: Rev II stack problem solved and another question


I just wanted to thank all those who responded via mail or the net for
solving my Rev II stack locking problem.  I shorted the two bottom train
lines by one inch to the last kite in the stack and it now stays put.
I flew the stack for about 3 hours yesterday after a storm with winds
starting around 20 MPH dropping to 10 MPH at the end of the session.
The stack performed well most of the time.   Even though the train lines
were pre-stretched, they are stretching more so I had to re-adjust the lines
a couple of times.  I do not own a single line kite other than a fighter,
so I could not stretch the line that way, obviously my solution of hanging
weights from individual train lines for a couple of days is less than
optimal.

This leads to a question, I do not know if this is a sign of locking
problems, or something repeatable.  Twice in high winds, but off to the
edge of the wind window I managed to somehow set up an oscillation in the
stack, kites one and three rose and two and four fell , then one and
three fell and two and four rose.  This went on for about 20 seconds.
I got comments from spectators that this was really neat ant to do it again.
Unfortunately, I have NO IDEA how I managed to do this, other than I was just
coming out of a turn after a dive.  The series of exercises for Revs that
I got from my dealer (he got them from Rev, it looks like a handout for a
class), has nothing like this.  Does anybody have any ideas how to do this
repeatably?


Thanks in advance,

Al Sparling
ajs@stairs.att.com
(708) 224-4242


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