Given that I have a steam engine, and now its size, the size of the piston, the length of its stroke and the force acting on the piston at certain points, I need to calculate the force on the crankshaft. Now, I now that Fx should be the same where the piston meets the crank, and we can ignore Fy at this point I think, since there is no friction. But how do I calculate the force at the other end of my crank? Where the crank pushes the flywheel? Since i don't really want people doing all the work for me I figured I needn't include variables, just some theory work from you guys would be much appreciated. Finally, am I right in thinking i need to know the velocity of my piston, and thus my crank(Or at least the velocity of one point) I also now the RPM of the flywheel when the piston is a t top dead centre (I.e fully closed) Hope that covers everything thanks in advance!