Need fabric recommendation for lawn targets - Page 2

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Need fabric recommendation for lawn targets Square Peg 04-29-2009
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Posted by Kate XXXXXX on April 29, 2009, 8:21 pm
Square Peg wrote:
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OK - Polo mints rather than carpets! ;) I get it...

OK, just make the whole thing double: sandwich your flat weights between
the two layers and sew them in. You might need 4 for the smaller
circles and 6-8 for the larger.

Cut your arcs and join them to make two circles... Lay them right sides
together and sew the INNER circle seam. Clip the seam allowance from
the cut edge almost to the stitching line... Turn through to the right
way out. Topstitch.

Turn under and baste or glue (Elmers will do, but allow it to dry!) a
half inch hem on the outside edge of each circle, turning the hem into
the middle of the sandwich, as it were.

Decide where you want the weight pockets and draw a line from the inner
edge to the outer edge at each side of the pocket. Sew along the lines.
Slip the weights in, and then just topstitch the whole thing closed
all round the edge.
--
Kate XXXXXX R.C.T.Q Madame Chef des Trolls
Lady Catherine, Wardrobe Mistress of the Chocolate Buttons
http://www.katedicey.co.uk
Click on Kate's Pages and explore!

Posted by Square Peg on April 30, 2009, 1:40 pm
On Thu, 30 Apr 2009 01:21:01 +0100, Kate XXXXXX

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I see that you are in the UK. We call them Life Savers over here.

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I'll have to study these instructions a bit and probably screw it up a
few times. I've done a little sewing, but have no real experience.

You have an interesting website. It looks like you are up for all
kinds of curious projects. Would this be something you might be
willing to do?

I'm going to call a couple of local shops and also talk to some tent
makers. But, if I can't find someone local, this can be done at a
distance. I'm happy to make the templates for the pieces.

Thanks for the help.

Posted by Kate XXXXXX on April 30, 2009, 5:33 pm
Square Peg wrote:
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Yup, for me, easy-peasy! ;) NOT something you'd want to pay
international shipping for... I could probably find fabric this end and
post the completed project, leaving you to slip weights into the
pockets. Email me if you want me to price it for you.

--
Kate XXXXXX R.C.T.Q Madame Chef des Trolls
Lady Catherine, Wardrobe Mistress of the Chocolate Buttons
http://www.katedicey.co.uk
Click on Kate's Pages and explore!

Posted by Square Peg on April 29, 2009, 2:14 pm
On Wed, 29 Apr 2009 00:12:33 -0700, "BEI Design"

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I see that I wasn't as clear as I should have been. When I said
"circle", I should have said "ring". The targets won't be solid disks,
but circular rings. For the smaller targets, the rings would be maybe
2-3" wide. For larger targets, wider.

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I would probably pack them up most of the time, but I'd want them to
be able to tolerate a little weather.

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Suppose I have some fabric that is 2 yards (72") wide. I can make
targets up to 1 yard in radius in a single piece (no sewing).

To make a 1-yard (radius) target, I would draw a circle with a 1-yard
(36") radius on one end of the fabric. The circle would touch both
sides and one end. When I cut it out, I'd have a solid circle with a
radius of 1 yard (diameter = 2 yards or 72").

But I don't want a solid target, I want a ring. If I want the edge of
the ring to be 3" wide, I'd draw another circle inside this circle
with a radius that is 3" shorter, or 33" in this case. When I cut out
this smaller circle, I will have a ring with a 36" radius and an edge
that is 3" wide and a small circle with a radius of 33" (which is
probably waste).

Is that any clearer?

For targets that are larger than the width of the fabric (most of my
targets), it will be necessary to cut the ring in pieces (segments)
and then sew them together to make the complete ring.

To make a target with a radius of 3 yards (diameter = 6 yards), I'd
need fabric 6 yards (216") wide. Even if this were available, I
wouldn't want it, because most of it would be waste. I don't want a
solid circle, just a ring a few inches wide.

I called a canvas store. Most canvas material comes in rolls that are
5 yards (60") wide. Here's where the mathematics comes in. ;-)

To make a target with a 5-yard radius (10 yard diameter), I'll need 6
pieces cut from a roll of fabric that is 5 yards wide. (I show the
calculations below.)

Here's the procedure to make a ring 3" wide with a radius of 5 yards.
This will work on fabric of any width.

1. Get a piece of string 5 yards long with a pin on one end and a
pencil on the other.

2. Lay the fabric on a solid surface. Pin one end of the string to the
center of the fabric 5 yards from one end.

3. Draw an arc (radius = 5 yards) on the end of the fabric. The arc
will touch the end of the fabric and go to both sides.

4. Move the pencil 3" down the string (radius = 3" less) and draw
another arc. This is one segment of the ring.

The narrower the fabric, the more segments will be needed. The number
of pieces can be calculated by first calculating the angle of the
wedge drawn in Step 3 above. The formula is:

Angle = 2 x arcsin((Fabric Width/2)/Target Radius)

For the example above,

Angle = 2 x arcsin((5/2)/5) = 60°

(I have done some conversions from radians to degrees that is now
shown.)

Now all that is needed is to calculate how many 60° segments there are
in a whole circle. Since a circle has 360°, the formula is:

Number of segments = 360 / Angle

In this case, 360 / 60 = 6. We will need 6 segments to make a target
with a radius of 5 yards out of fabric that is 5 yards wide.

Here's a table showing how many pieces are needed for targets with
radii up to 10 yards from fabric 5 yards wide:

Target Angle Angle
Radius Radians Degrees Pieces
3 yd 1.97 rad 112.89° 3.2
4 yd 1.35 rad 77.36° 4.7
5 yd 1.05 rad 60.00° 6.0
6 yd 0.86 rad 49.25° 7.3
7 yd 0.73 rad 41.85° 8.6
8 yd 0.64 rad 36.42° 9.9
9 yd 0.56 rad 32.26° 11.2
10 yd 0.51 rad 28.96° 12.4

Now I am quite sure that is way more information than you needed or
wanted. ;-)


In any case, I need a fabric that is stiff enough to hold its shape
when formed into rings of this size, can be sewn on a home sewing
machine, is more or less outdoor safe, and comes in bright colors.

Posted by Kathleen on April 29, 2009, 8:33 pm
Square Peg wrote:


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You can get scenery canvas 72" wide from Dharma Trading Co. It's
natural colored but you can dye it with supplies they sell. The extra
width might simplify some of your cutting.

http://dharmatrading.com/html/eng/3681-AA.shtml?lnav=fabric.html


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