Shaft engines are those kind of engines which transmits its rotatory power or torque using a Drive Shaft. Drive Shaft are subject to torsion and shear stress.
Drive Shaft has a great history....
Do you remember the old steam locomotives, they used to have a long steel rod mounted on the wheels of the steam engine. It used to slide length-wise and varying its length effectively. Ya, its a kind of drive shaft (as shown in pic) called 'quill drives'.
|Photo Courtesy TijsB|
I remember when i used to go to school, i often see a rotating cylindrical rod beneath a truck. I used to think how this rotating rod is moving the wheels of the truck. Actually that rotating rod is noting but a Drive shaft which is transmitting the power to the wheels.
|Photo Courtesy troymckaskle|
So all this is Drive Shaft all about....
Now Shaft Engines are of two Types: