Read more and see photos via the source link. Source: http://www.modelairplanenews.com/blog/2014/04/23/incredible-electric-ec-135/
I was looking at the website of the manufacturer and saw they use an interesting motor layout. Take a look. Sources: Airframe Manufacturer: http://www.helikoptertechnik.de/html/produkte.html EC-135 example: http://www.leomotion.com/shop/inhalt.php?content=infos