This craft uses the Kerbal Airplane plus Mod which adds a ton of stock alike aircraft parts to the game, it's AWESOME. here's the link to the Airplane Plus forum page:
http://forum.kerbalspaceprogram.com/index.php?/topic/140262-122-airplane-plus-r120-trailingleading-edge-flaps-more-airliner-parts-feb-21-2017/
The K-11 Craft file is available under the craft files page. The file is called