I got a lot of practice sewing curved seams on my last project, which was jacket 103 from BurdaStyle Magazine Oct 2007. The magazine description: "A round bias cut insert vividly offsets the straight lines of the plaid as well as emphasizing the fitted silhouette of the short jacket. This combination of narrow lapels/reveres with an extra wide collar is also new."
I have liked this jacket since I got the issue because of the inserts and the fitted silhouette. It just took me a while to find a suitable fabric. Looking at the line drawing I was a little puzzled as to how the fitted silhouette was achieved without darts. There is only so much fitting in the bust area that can be done with curved sides seams.
To find out, I traced the patterns pieces and taped them together with removable clear tape. Because the traced pattern pieces have no seam allowances, taping the pieces together along the seams is a great way to check the accuracy of the tracing, the draft of the pattern and the silhouette. I found that some of the bust and hip shaping is done with the insert. The insert shape is not an exact duplicate of the cut out shape. The length of the curve is the same, but the shape of the curve on the insert is slightly different than the curve of the cut out. When the insert is sewn in the opening, it creates the same shape that a side bust dart and vertical bust dart would create.
Burda recommends a 3/8 inch seam allowance on all the curved seams of the jacket cutout and the insert. This is definitely a good tip, but a lot of clipping is required to get pucker free insertion.
The collar is a bit different, very wide compared to the lapel and with a collar stand only in the back neck area which makes it stand up nicely. The collar stand is yet another inset curve. And the insets have to sewn in the lining as well. Like I said, lots of curves. The wool blend fabric was purchased at Hancock’s.