one square block into a pinwheel?
#1
Junior Member
Thread Starter
Join Date: May 2010
Location: Iowa
Posts: 100
I have enjoyed the you tube video to make pinwheels from two squares sewn together a 1/4 inch all the way around the outside edge. I would like to have a chart that shows you what size blocks to start with to end up with a 5 inch pinwheel and a 6 inch pinwheel. Can any help?
#2
#3
Super Member
Join Date: Mar 2011
Location: Peotone IL
Posts: 2,802
Originally Posted by erstan947
http://www.quiltingboard.com/t-57124-1.htm#1377835
Maybe this will help:)
Maybe this will help:)
#4
On the last 4 measurements she gave, there was a difference of 3 inches between the square she started with and the ending size. So I would try 14 inches and see if that is slightly too big. Easier to make it smaller than make it bigger. If 14 is too big, try 13.
#5
Super Member
Join Date: May 2008
Location: Florida
Posts: 3,708
When we were doing the pinwheel project a member, Ceil, came up with this formula that works!
"Whatever your block side is subtract .5 then multiply by 1.4 then subtract .5. "
Starch or sizing the fabric is a must before you cut out the squares.
So you would have:
to end with a 6" block
Start with 2 5.5 inch squares
5.5 minus .5 = 5
5 x 1.4 = 7
7 Minus .5 = 6.5 unfinished block = 6" finished
To get a 5"
Start with 2 5 inch squares
5 - .5 x 1.4 - .5 = 5.8 trim to 5.5 unfinished = 5" finished
Try it on some scrap fabric.
If your seams are a true 1/4" it should work.
HTH
"Whatever your block side is subtract .5 then multiply by 1.4 then subtract .5. "
Starch or sizing the fabric is a must before you cut out the squares.
So you would have:
to end with a 6" block
Start with 2 5.5 inch squares
5.5 minus .5 = 5
5 x 1.4 = 7
7 Minus .5 = 6.5 unfinished block = 6" finished
To get a 5"
Start with 2 5 inch squares
5 - .5 x 1.4 - .5 = 5.8 trim to 5.5 unfinished = 5" finished
Try it on some scrap fabric.
If your seams are a true 1/4" it should work.
HTH
#6
Super Member
Join Date: May 2008
Location: Florida
Posts: 3,708
Originally Posted by gramajo
Originally Posted by erstan947
http://www.quiltingboard.com/t-57124-1.htm#1377835
Maybe this will help:)
Maybe this will help:)
8.5 -.5 x 1.4 - .5 = 10.7 trim to 10.5
Test it with scrap material!
Starch the fabric before cutting since you are working with bias edges.
HTH
#7
Originally Posted by susiequilt
When we were doing the pinwheel project a member, Ceil, came up with this formula that works!
"Whatever your block side is subtract .5 then multiply by 1.4 then subtract .5. "
Starch or sizing the fabric is a must before you cut out the squares.
So you would have:
to end with a 6" block
Start with 2 5.5 inch squares
5.5 minus .5 = 5
5 x 1.4 = 7
7 Minus .5 = 6.5 unfinished block = 6" finished
To get a 5"
Start with 2 5 inch squares
5 - .5 x 1.4 - .5 = 5.8 trim to 5.5 unfinished = 5" finished
Try it on some scrap fabric.
If your seams are a true 1/4" it should work.
HTH
"Whatever your block side is subtract .5 then multiply by 1.4 then subtract .5. "
Starch or sizing the fabric is a must before you cut out the squares.
So you would have:
to end with a 6" block
Start with 2 5.5 inch squares
5.5 minus .5 = 5
5 x 1.4 = 7
7 Minus .5 = 6.5 unfinished block = 6" finished
To get a 5"
Start with 2 5 inch squares
5 - .5 x 1.4 - .5 = 5.8 trim to 5.5 unfinished = 5" finished
Try it on some scrap fabric.
If your seams are a true 1/4" it should work.
HTH
#8
Member
Join Date: May 2011
Location: New Jersey (North)
Posts: 32
One thing I discovered using this method was This gives you the size one on the 4 pinwheel blocks, then you put them together to make your pinwheel or what other shape/ pattern you want. I was trying to make a 4" pinwheel, followed the above for a 4" block and ended up with an 8" pinwheel once all pieces were put back together. So you want your "block" to be 1/2 of the finished pinwheel size. 10" pinwheel would use 4 5" blocks. (Just rough measurements as an example) When you are cutting up your square you are making 1/2 sq triangles not the pinwheel. The pinwheel comes from the 4 cut blocks re sewn.
http://www.moonlightquilters.org/tipHSTfav.htm
Is another site with sizes for the HST.
I'm still new at this but it was something I learned the hard way.
http://www.moonlightquilters.org/tipHSTfav.htm
Is another site with sizes for the HST.
I'm still new at this but it was something I learned the hard way.
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