Need help with 4 1/2" pin wheel
#1
Hello I have looked up in my favorite 501 rotary cutting blocks book and it says how to make a 4" pinwheel ( by using 2 7/8" fabric for the squares) but I do not know if that includes seam allowance. how do I make it 4 1/2" it says to cut the fabric 2 7/8 inches to make the 4" block does this mean that once sewn it will be a 3 1/2 block. UGGHHH!!
forgive me I have had a weird migrain and I need to finish my moms vintage dresden plate quilt. I am trying to make it easy with strips and pinwheels in 30's print.
forgive me I have had a weird migrain and I need to finish my moms vintage dresden plate quilt. I am trying to make it easy with strips and pinwheels in 30's print.
#3
Super Member
Join Date: May 2008
Location: Florida
Posts: 3,708
Using 2 7/8" will result in 2 1/2 inch squares so it does include the seam allowance. Two 2 1/2" squares sewn will give you the 4 1/2" you need. I would recommend you use 3" squares and plan to trim the blocks to 2 1/2" when done. That 1/8" could make a difference in a block to small.
#4
Banned
Join Date: Mar 2010
Location: Sturbridge, Ma
Posts: 3,992
I don't understand that direction. I would assume the 4" finished pinwheel block is made from 4 half square triangle blocks. If this is the case then to understand then do what I had to do many years ago to understand the half square triangle concept.
So draw a square 4" and put the diangonal lines in as the finished pin wheel should be.
Each small half square triangle finishes out at 2".
Are You with me.
Then take the 2" square and draw on graft paper.
Put diagonal line. Then put your 1/4" seam allowance all around it. Then on the bottom from the square corner to the diagonal point measure. This will be 2 7/8"
When making triangles into squares you need to add 7/8" instead of the usual 1/2" to compensate for the angle.
So the directions are correct. four squares made of 1/2 square triangles with each triangle cut 2 7/8" will finish at 2 1/2" with seam allowances.
So draw a square 4" and put the diangonal lines in as the finished pin wheel should be.
Each small half square triangle finishes out at 2".
Are You with me.
Then take the 2" square and draw on graft paper.
Put diagonal line. Then put your 1/4" seam allowance all around it. Then on the bottom from the square corner to the diagonal point measure. This will be 2 7/8"
When making triangles into squares you need to add 7/8" instead of the usual 1/2" to compensate for the angle.
So the directions are correct. four squares made of 1/2 square triangles with each triangle cut 2 7/8" will finish at 2 1/2" with seam allowances.
#6
Originally Posted by susiequilt
Using 2 7/8" will result in 2 inch squares so it does include the seam allowance. I would recommend you use 3" squares and plan to trim the blocks to 2" when done. That 1/8" could make a difference in a block to small.
Pinwheels are my favorite block. :lol: :D
#7
Thank you so much for the advice. I will make it and see what happens when done will post tomorrow!! Thank you for thinking for me at least when I sew I don't have to think!
#9
Originally Posted by Quiltforme
Thank you for thinking for me at least when I sew I don't have to think!
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