Forums / Off Topic / Lets talk engines

3 years 51 weeks ago, 12:36 PM

HampsterW

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Lets talk engines

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Photobucket

The Wartsila-Sulzer RTA96-C turbocharged two-stroke diesel engine is the most powerful and most efficient prime-mover in the world today. The Aioi Works of Japan 's Diesel United, Ltd built the first engines and is where some of these pictures were taken. It is available in 6 through 14 cylinder versions, all are inline engines. These engines were designed primarily for very large container ships. Ship owners like a single engine/single propeller design and the new generation of larger container ships needed a bigger engine to propel them. The cylinder bore is just under 38" and the stroke is just over 98". Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower. Total displacement comes out to 1,556,002 cubic inches (25,480 liters) for the fourteen cylinder version.

Some facts on the 14 cylinder version:

Total engine weight:

2300 tons (The crankshaft alone weighs 300 tons.)

Length:

89 feet

Height:

44 feet

Maximum power:

108,920 hp at 102 rpm

Maximum torque:

5,608,312 lb/ft at 102rpm

Fuel consumption at maximum power is 0.278 lbs per hp per hour (Brake Specific Fuel Consumption). Fuel consumption at maximum economy is 0.260 lbs/hp/hour. At maximum economy the engine exceeds 50% thermal efficiency. That is, more than 50% of the energy in the fuel is converted to motion.
For comparison, most automotive and small aircraft engines have BSFC figures in the 0.40-0.60 lbs/hp/hr range and 25-30% thermal efficiency range.
Even at its most efficient power setting, the big 14 consumes 1,660 gallons of heavy fuel oil per hour.
A cross section of the RTA96C:
Photobucket

The internals of this engine are a bit different than most automotive engines.
The top of the connecting rod is not attached directly to the piston. The top of the connecting rod attaches to a "crosshead" which rides in guide channels. A long piston rod then connects the crosshead to the piston.
I assume this is done so the the sideways forces produced by the connecting rod are absorbed by the crosshead and not by the piston. Those sideways forces are what makes the cylinders in an auto engine get oval-shaped over time.
Installing the "thin-shell" bearings. Crank & rod journals are 38" in diameter and 16" wide:

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The crank sitting in the block (also known as a "gondola-style" bedplate). This is a 10 cylinder version. Note the steps by each crank throw that lead down into the crankcase:

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A piston & piston rod assembly. The piston is at the top. The large square plate at the bottom is where the whole assembly attaches to the crosshead:

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Some pistons:

And some piston rods:

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The "spikes" on the piston rods are hollow tubes that go into the holes you can see on the bottom of the pistons (left picture) and inject oil into the inside of the piston which keeps the top of the piston from overheating. Some high-performance auto engines have a similar feature where an oil squirter nozzle squirts oil onto the bottom of the piston.

The cylinder deck (10 cylinder version). Cylinder liners are die-cast ductile cast iron. Look at the size of those head studs!:

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The first completed 12 cylinder engine:

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Change you can truly believe in comes from the barrel of a gun---------------------------------------------------------------------------------Ron Paul 2012----Vote the bastards out!---------------------------------
3 years 51 weeks ago, 2:41 PM

manu2014

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Cool Engine

Bored today? If this was in the States they wouldn't be able to get a permit to move it.

Rather than love, than money, than fame, give me truth. Thoreau
3 years 51 weeks ago, 2:49 PM

Larry Wagner

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As an old

As an old diesel mechanic from way back, I have had my hands on 2 very large Cat engines, but NOTHING like this. I wanna get my hands on it!!!!!

Any day above dirt is a good day!!! My New Motto: Where Do I Sign? (Oh yes I would)
3 years 51 weeks ago, 2:54 PM

Vaquero

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Larry

Bud, I aint no mechanic, but I figure a lockwasher on that thing is more than I can carry.
You can have it!

The truth, the whole truth and nothing but the truth!
3 years 51 weeks ago, 3:01 PM

Larry Wagner

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Vaq

Yea I can guarantee it's a ball buster, even with overhead crains & pickers. But Damn, what a hunk of iron!!!

Any day above dirt is a good day!!! My New Motto: Where Do I Sign? (Oh yes I would)
3 years 51 weeks ago, 3:56 PM

manu2014

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Shoehorn - Jeep

Think they make a shoehorn big enough to get this in my jeep? Solve the torque issue!!!

Rather than love, than money, than fame, give me truth. Thoreau
3 years 51 weeks ago, 3:58 PM

samD

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Or do you just roll down the driveway and pop the clutch? Hard to drag start a boat though... Fuck me dead, that things is beautiful. 1820 Litre (L) = 480.793135292 Gallons of Diesel to fill a cylinder. Just saying 15% fuel 85% air @ $4.00 gallon = +/- $79.00 per stroke per cylinder times 14!.
Per their numbers it burns .260 gal per hr per hp.
110,000 + hp = 27000+ per hr of operation.

3 years 51 weeks ago, 4:02 PM

Vaquero

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79.00 per stroke

sam, yer walking in high cotton there!

The truth, the whole truth and nothing but the truth!
3 years 51 weeks ago, 3:59 PM

Schuyler

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mostly on larger fishing boats, but this takes the prize.

"All that is necessary for the triumph of evil is for good men to do nothing." - Edmund Burke
3 years 51 weeks ago, 4:03 PM

samD

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Larry, how much fuel would that thing use and once it is started is it ever shut off. How do you start that Mother?

3 years 51 weeks ago, 4:06 PM

Vaquero

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hmmm?

It must be.

The truth, the whole truth and nothing but the truth!
3 years 51 weeks ago, 4:57 PM

runawaygun762

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for my truck. I need to figure out how to shoehorn this thing in there. I might need an F450.

"I have always been a soldier. I have known no other life. The calling of arms, I have followed from boyhood. I have never sought another." From The Virtues of War, by Steven Pressfield.

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