Yak-54?
I have never heard of a Yak-54 is it a piston-engined plane? I know of a Yak-1, Yak-3, Yak-7 and a Yak-9 from WWII but 54?
Anyway m8 the prop was done using polys. I create a polygon and then mould it into the rough shape of a propeller blade. Then I apply a twist deformer and smooth it - don't look too bad.
For the screw, this is done with NURBS using a revolve on a curve for the basic shape. I then used more NURBS to cut holes for the bald to go into and capped the end of the screw.
Does that make sense? I'll post some snaps if you want and an update on the plane tommorrow since I'll be working on it all day 
BTW, nice to hear from you again K Brown and I like your Peregrin Falcon 
Tickety boo and ta ta for a bit...
Gazzamataz
https://www.gazzamataz.com