Showing simple one-direction cooling on an e3d hotend - images to explain something for

Showing simple one-direction cooling on an e3d hotend - images to explain something for another post.

Sorry, this was in relation to another discussion about the Eustathios hot end cooling, this isn’t a Eustathios.

https://plus.google.com/109092260040411784841/posts/VZQNccsWhqL