Installing the crankshaft for a Wartsila RT-flex96C-9 two-cycle diesel

Installing the crankshaft for a Wartsila RT-flex96C-9 two-cycle diesel

Googled it for the lazy. Container ship engine. This has 9, but available with up to 14 cylinders. The 14 cylinders is 44ft tall, 87ft long, and has 107,390hp.

The crankcase is almost as crazy as the crank. Is it one piece of aluminum? What aluminum producer can make a casting that big without internal defects? How the hell do you machine it? Do tolerances increase with the size of the motor, so this has like 15cm tolerances?

Wiki page says between 22 and 120rpm. 1810 liter displacement per cylinder with a stroke of over 8 feet, burns 6.5 ounces of fuel each cycle. The pistons weigh in at 5.5 tons and that crank weighs in at 300 tons.

The craziest number is the 5,608,310 ft lb of torque at 102 rpm.

Jesus that's massive

The hp number is kinda dissapointing considering how physically large it is. I'm too lazy to look it back up, but it said it was a low revving turbo-diesel, and I'm curious what rpm it actually runs at. Just imagine, 120rpm would mean that whole crankshaft, and each massive cylinder, was doing 2 revolutions per second.

They make that efficiency using the most rubbish of fuel oil too

It's a 10 cylinder crankshaft, not 9.

Yup. We used to heat it to about 145 degrees Centigrade before it could be injected. We also ran the generators and boilers on the same fuel. It's horrible stuff.

These engines are actually among the most thermally efficient internal combustion engines ever built. They have a thermal efficiency in the region of 52%.