Marine Propellers and Propulsion


Book Description

The early development of the screw propeller. Propeller geometry. The propeller environment. The ship wake field, propeller performance characteristics.
















IDIOT GENIUS Willa Snap and the Clockwerk Boy


Book Description

Idiot Genius: Willa Snap and the Clockwerk Boy is the first book in a new sci-fi polypunk series by Richard Due, author of the award-winning Moon Realm series. What¿s it about? Here¿s Willa (she's eleven):Ever wonder why some crazy scientist hasn¿t blown up the world? I used to wonder about it all the time. Actually, I was pretty sure my mom would be the one to do it.But now I know better. It turns out there¿s a force working hard to keep the world from going KABLOOEY.Who are these people? Wait for it:Idiots. Yep, you heard me right.How do I know? Well, apparently, I¿m an Idiot. At least, according to the Geniuses I am. Confused? I¿m not surprised. You¿re probably an Idiot too. It all began on a Thursday at precisely 8 a.m. I was standing in the family room of our lovely two-story house, directly across the street from Squirrel Brand Park in Cambridge, Massachusetts. The same family room that, in a few minutes, I would never ever, ever see again¿ever.