Aeroplanewing 4X9
Design ID 14181
Colour White | Element ID 6040362
Colour Black | Element ID 6048849
Colour Light Bluish Gray [BL]/Medium Stone Grey [TLG] | Element ID 6048848
A new design (shown here in Light Bluish Gray) for the old part 2413 (shown here in White) began appearing in sets this year. Viewed from the top, they appear identical but seen from the bottom the change is obvious; notches have been added along the diagonal edges so that they can now be attached to elements underneath. It appears in five sets so far (but may also be used in older sets as the previous version runs out). White is in 60012 Coast Guard 4x4 & Diving Boat and 9664 First LEGO® League Challenge 2013 Nature's Fury. Black is in 76007 Iron Man": Malibu Mansion Attack and 76001 The Bat vs. Bane": Tumbler Chase. Light Bluish Gray is in 60015 Coast Guard Plane.
Decisions about whether or not to use notches have a long history at LEGO. At the time when System in Play began in 1955 you could buy little spare parts boxes of 'macaroni', the 2X2 round corner brick (part 3063), but this part came in notched and notchless versions simultaneously. Not like Schrödinger's cat though. Distribution of the two versions was seemingly random, just like when parts get new moulds today and you're unlucky enough to get both types in your set. Although the notchless version certainly looks nicer, its limited ability to attach to elements below meant a swift death, in 1957. Also killed was the larger macaroni sister, the 2X4 semi-circular version, also available with and without notches - but even the notched version was deleted, deemed superfluous. This left only the classic 2X2 notched macaroni to survive (until a somewhat irritating redesign in 2008, but let's not go there right now).