The Heart – Part II.

by fldptr

Thoughts on being a cardiac surgeon

There was some word about the types of engines in the last post, underlining 2T and 4T. It is hard to emphesize it well enough, how important it really is to do some homework, and develop a good overstanding of these engine types. Mechanics is not all about the material. The immense amount of theories, calculations, thought and experience behind these creatures is what actually makes them work. There is a number of helpful and reliable sources out there to help you learn about them. On wikipedia or on youtube too. Even about how they are made like this video.  It is really recommended for anyone into mechanics to spend some time going through these if you are not familiar enough with concepts like cranckhaft rotation degrees or spark advance.  It is a great rewarding feeling to actually know how it works. But the details that are often missed however some of these are the real eye-openers.

If I tell you that engines are precisely engineered, that might not be a big surprise. But If I tell you that dealing with them desires measurements made in the a range of 0,001-0,01 millimeters, whether it is a condition check, setting up a diagnose or actually amendment, now that is something surprising.  Follow this simple logic: if an engine does 6 thousand rotations per minute, that means one hundred per second. It’s even difficult to imagine the piston travelling up and down at this rate, a hundred up and a hundred down per second in a four stroke engine. But the fact that it is pushed by a series of combustions makes it even more ridiculous. Like the other fact, that the difference in size between the piston and the cylinder, in terms of diameter is only 0,02 milimeter. And this precise thinking is absolutely needed for all those astronomical number of combustions that they go through in their lifetimes.

However, they are robust. If love, rightousness and passion are attributes to describe a heart, an engine would be attributed by friction, heat, pressure.  There is no other way around it, they are built to be solid, so they last for at least a trip or two. This comes with a lot of engineering in the backround. The relatively light structure, materials used for each screw, sealings or coatings are precisely chosen and developed.

We are ought to respect that, and develop an approach that helps us to regard these pieces as something precious, fragile.