1/144 Sturgeon class SSN submarine propeller Mikro Mir

Description

I will combine shipping!  Add all the items you are interested into your cart and then request the total from me.
In this set, you get:
1 x 7-blade replacement
for Mikro Mir's 1/144 scale Sturgeon kit # 144-030
This is the 7-blade J-type screw that came about after the blade rate sonar issue was discovered during Skipjack trails in the late 1950s. The J-type screw became common place on all USN SSNs shortly thereafter.
This 1:1 replaces the Mikor Mir kit-part, correcting the completely incorrect 6-blade propeller.
This is CAD designed and 3D printed. 3D printing allows extraordinarily fine detailing, and the execution is superior to the awkward-to-assemble photo-etch versions.
Instructions on how to remove the screw from the sprue:
Given the thin section of the screw blades, some care will need to be taken when removing the screw from the sprue.  The resin is by nature brittle, but the sprue is thinnest where it attaches to the screw blade as it attaches at a point, by design.  The best practice is to place your flush cut pliers flush up against the bottom of the screw blade, at the point where the sprue attaches, and trim there.  Do not trim from the bottom, larger diameter end of the sprue.  I've found that the shock of shearing the larger diameter sprue at the bottom can ping the propeller blades right off the screw boss.  An alternate approach is to use a fine tooth razor saw as I've had some feedback regarding people having issues with sprue cutters.  Work outboard to inboard, that is, trim the outboard sprues first, and then the inboard.  As the outboard sprues can obscure the inboard ones, after I've detached it from the screw blade, I then trim it off the base to allow access to the sprues deeper in.  Patience and care needs to be taken.  Once trimmed, you'll often have a small residual sprue-nub on each propeller blade.  I then use a very narrow sanding stick to carefully sand the nub down (I use the flexible/soft and narrow sanding sticks that can be purchased at just about any Hobby Lobby in the U.S.).
I will combine shipping!  Add all the items you are interested into your cart and then request the total from me.
Other 1/350 scale submarine items of interest can be found here, from full kits to detail and upgrade sets at my Shapeways store:  Shapeways'dot'com/shops/mulsannescorner