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stack them hight
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skiandgolf1962



Joined: 06 Dec 2006
Posts: 328
Location: Canada Ontario Whitby

PostPosted: Mon Jan 26, 2009 8:46 pm    Post subject: stack them hight Reply with quote

I have 10 delta dollar store kite
The rainbow ones with a keel

I want to stack them
I try linking them together with 2 lines thru the side holes (think ladder)
But this didn’t work. And set up was taking way too long

So now I have 2 other idea’s
1: Sewing a pigtail on the top of each (1/4 ribbon) (see red loop)
Start at the toe point sew in and cut a small hole in top skin pass thru loop back thru and sew down

2: sew a loop on the top skin
Sew it at the start and end of the keel (see blue loop)

Witch one will work?
COMMENTS PLEASE

http://offtype.net/image_4431378604040.gif.html
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Grand Champion, Kite, & Kitebuilder of the Year 09


Joined: 15 Jun 2008
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Location: The Montessori School of Kites (near Findlay, OH)

PostPosted: Mon Jan 26, 2009 9:45 pm    Post subject: Reply with quote

I would go for option #1, sort of.

I think that if your loop wrapped around the spine at the point that was vertically equal to the tow point location, so that the train line was anchored to the spine and not to the keel, it would work.

If you look at the sketch of the "standard" Dan Leigh delta, I'm talking about making the attachment loop wrap around the spine at "B"


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coupster



Joined: 26 Jan 2007
Posts: 66
Location: Boston, MA

PostPosted: Mon Jan 26, 2009 10:45 pm    Post subject: Reply with quote

I stacked 5 DT Box Deltas last season. With the obvious exception of the top kite, I attached 2 pigtails to the tow point on the keel, 1 short and 1 long. The long one was threaded up through grommetted holes in the side of the box (right beside the tow point) and in the top (back) of the box (about in the middle) and attached via a larks head to the short pig tail of the next kite up the line. (You should be able to just run the long pigtail up the side of the keel and through the sail) The kites were spaced as far apart as the width of the wing span and although they flew fine. Longer spacing is on my to do list.

This method of stacking permits each kite to essentially fly on its own line separate from the rest. This separation worked so well that on its maiden flight a catastrophic failure of the spreaders on the 2 top kites had no effect on the lower kites fly ability and I was able to bring the train down in a controlled manner.

Beware of the pulling power of your 10 kite train, there's a discussion somewhere here on the multiplication of the force generated as additional kites are added to the line. I used 350# line with the five and I'm glad I did.

10 kites should be a spectacular sight. Take a picture unlike me who didn't.
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kiteguy
Kitebuilder of the Year 2005
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Joined: 16 Sep 2003
Posts: 8656
Location: USA - Kansas, Overland Park - Near Kansas City

PostPosted: Tue Jan 27, 2009 12:25 am    Post subject: Reply with quote

I recently saw a picture of a stack of delta kites.

There was a line from the ends of the spreader spar to the same point of the kite above, etc. There was also a line from the tail end of the center spar to the tail end of the kite above...etc.

I could not tell exactly, but it looked as if there was a line from the keel of the above kite to the center of the cross spar of the kite below, on each. There did not appear to be much, if any, stress on the keel line. Just enough to keep the keel down as a vane.

Now, I wonder......where did I see that picture? Confused
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KiteSquid
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Joined: 29 Aug 2003
Posts: 11696
Location: USA Virginia King George

PostPosted: Tue Jan 27, 2009 12:51 am    Post subject: Re: stack them hight Reply with quote

skiandgolf1962 wrote:
I try linking them together with 2 lines thru the side holes (think ladder)
But this didn’t work. And set up was taking way too long


You were only controlling the 2nd-10th kites in roll. you need to make sure that all kites are either self stabilizing or are all controlled by the 1st kite in roll, pitch and yaw.

That would require 3 or 4 lines, depend on how far apart you put them on the frame.

You might try adding a 3rd line that connects all the noses, and a fourth line that connects all the trailing tips of the spines.


The down side of this system is all the compression forces are on the first kite, so you MIGHT have to reinforce the frame on it.
skiandgolf1962 wrote:
So now I have 2 other idea’s
1: Sewing a pigtail on the top of each (1/4 ribbon) (see red loop)
Start at the toe point sew in and cut a small hole in top skin pass thru loop back thru and sew down


you have to make sure that the loop is sewn on the perfect spot or the pull from the upper kites will upset the AoA of the lower kites.

skiandgolf1962 wrote:
2: sew a loop on the top skin
Sew it at the start and end of the keel (see blue loop)

Witch one will work?
COMMENTS PLEASE

http://offtype.net/image_4431378604040.gif.html


This one will also upset the AoA of the lower kites as the above idea, but the previous one will be stronger.....


You have to find the sweet spot to attach the loops.
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themax



Joined: 17 Nov 2007
Posts: 247
Location: Lafayette, Colorado

PostPosted: Tue Jan 27, 2009 4:36 am    Post subject: Reply with quote

Not as satisfying as a true train, but easier, is to attach all deltas to a line with leaders. It's not as satisfying as a train because the kites are all free to do as they please with no coordination with their neighbors.
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kiteguy
Kitebuilder of the Year 2005
Kitebuilder of the Year 2005


Joined: 16 Sep 2003
Posts: 8656
Location: USA - Kansas, Overland Park - Near Kansas City

PostPosted: Tue Jan 27, 2009 5:06 am    Post subject: Reply with quote

OK, I just reread the original message. 10 dollar store delta kites. Plastic, or ripstop?

Either way, another option would/could be to make an arch. Use a long piece of line. You would need about 150 ft of line for the arch. Loop on each end to fasten to ground stakes. Put some attachment points on this line, about 12 feet apart. These could be loops, or maybe larkshead some swivels, or pop can tabs. or whatever.

Put a 5 ft line on each kite. Fasten each to one of the loops and finally you would have an arch with delta kites flying on a 5 ft line.

I did something similar to this with some sled kites. It put the kites down where they could be seen by the kids around the area, and not hanging waaaay up there, specks in the sky. Wink

To paraphrase a quote from someone that was quoting someone else....Once you have seen one speck in the sky, you have seen them all.
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