I've seen a website ages ago called something like "www.howthingswork.com"

It had an ace animated gif of a horizontally opposed engine and a great narrative.

I can't find it now ... and I've told someone about it who's going to think I imagined it.

Can anyone help ?

TIA

 

 

http://auto.howstuffworks.com/engine-flat.htm

 

Thanks for that info,now I know why it is such a smooth engine.

Les