Check here:
http://en.wikipedia.org/wiki/Flag_of_Yugoslavia-
Enlarged red star (two lower star tips ending within the red band and top ending within the blue band)
with yellow outline was adopted on February 1st, 1946
- in late 1940es width to length ratio was changed from 1:2 to 2:3.
Earlier flag was more elongated! in late forties yellow outline became wider...
1946 flag:
Late 1940es flag:
Also from wikipedia, this would be the 1945-1946 flag:
There is absolutely nothing about the white outline! So, if there is an outline, it has to be yellow...
Almost all of the photos show the enlarged red star. You may consider correcting that too...
About the bands on the tail of 27: both photos show the interruption of the white trim tributable to the red band under the white one, and both are thinner than the white one.
Photos show white band somewhat wider than the red or blue, but
not double the width of the red or blue band. The red star is also of the enlarged type, not the small as you made it.
Regards,
KL