Lawn Mower Engine

[NQ6U]

For when the grass gets really long...

http://i815.photobucket.com/albums/zz79/gyrogeerloose/01.gif

[KE7DKN]

What kind of grass are we talking about?

[KG4CGC]

What is that?
No really.
What the hell is that?

[KE7DKN]

What is that?
No really.
What the hell is that?

I'd assume it's an engine for a ship.

[NQ6U]

Yep, it's a ship engine. Here's the blurb:



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 more 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 ft/lb 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 in 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.

One hundred and eight thousand horsepower, Five and a half million ft/lbs of torque...

[kb2vxa]

The world's largest Diesel engine powers the world's largest container ship, the Emma Maersk.
http://www.yousaytoo.com/perez/emma-maersk/9043
There was a little problem however:
http://www.youtube.com/watch?v=gG0vcDGmCf4

[WØTKX]

Bigass straight six? :shock:

That truck is pretty slick too.

[KE7DKN]

Yep, it's a ship engine. Here's the blurb:


Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower.


For visualization: A cylinder a meter wide and about 2.32 meters tall would have that volume. Impressive.

[PA5COR]

Worked for Wartsila in Zwolle, now closed, where they buildt these big ass engines, doing maintenance work on their stainless steel tanks and piping, saw these engines being buildt and tested.

Now there were some nice engines..... bit heavy on the use of oil, but then, who cares ;)

[NQ6U]

But wait, there's more!

http://i815.photobucket.com/albums/zz79/gyrogeerloose/04.jpg

http://i815.photobucket.com/albums/zz79/gyrogeerloose/03.jpg

http://i815.photobucket.com/albums/zz79/gyrogeerloose/11.jpg

[kc7jty]

far out

[W3MIV]

Fascinating. Babbit bearings.

[W3MIV]

far out

Wow, man. A refugee from 1972! ;)

[NQ6U]

Fascinating. Babbit bearings.

Really big babbit bearings. Babbit bearings that require a crane to lower them into place. And, if you look closely, you'll notice that there is a series of permanent ladders built into the crankcase so mechanics can climb around to inspect things inside the engine.

The scale of the thing is just astonishing. Over 100,000 HP @ 110 RPM! Most engines won't even idle that slowly.

[kf0rt]

Really big babbit bearings. Babbit bearings that require a crane to lower them into place. And, if you look closely, you'll notice that there is a series of permanent ladders built into the crankcase so mechanics can climb around to inspect things inside the engine.

The scale of the thing is just astonishing. Over 100,000 HP @ 110 RPM! Most engines won't even idle that slowly.

Bet it's loud.

[KG4CGC]

Wow, man. A refugee from 1972! ;)
"Sock it to me , baby!"

[kc7jty]

Wow, man. A refugee from 1972! ;)

Stoppit Albi you're making me up close.

[w2amr]

Yep, it's a ship engine. Here's the blurb:



One hundred and eight thousand horsepower, Five and a half million ft/lbs of torque...
"1,660 gallons of heavy fuel oil per hour."
Damn, how big is fuel tanks? And who mixes the oil with the fuel?

[NQ6U]

Bet it's loud.

It would be interesting to hear it run on a test stand. The thing is huge, but it only turns @ 110 RPM.

[KG4CGC]

It would be interesting to hear it run on a test stand. The thing is huge, but it only turns @ 110 RPM.
You can get another 30K bhp by adding alcohol. It thins the mix to increase fuel flow but I have heard of using propane injectors. Only problem with adding alcohol though is that it breaks down the lubricating qualities of a 2 stroke system.

[PA5COR]

The Ships engines in Zwwolle were tested in very large soundproof chambers with walls that could move to bring the machine in and out of the chamber.
It was connected to a very large propellor that was in a very large tank of water to test the engiine, doing a first breaking in and clock the power.
http://www.wartsila.com/,en,productsservices,productportfolio,product,,240 79490412160704,no,8001.htm

Quite impressive...

[kf0rt]

It would be interesting to hear it run on a test stand. The thing is huge, but it only turns @ 110 RPM.

Yeah, I was just thinking that it probably kills a quart of fuel each time a piston fires.
Impressive.

[kc7jty]

2 stroke diesels have crank case oil just like a 4 stroke and intake valves at the top of the cylinder. No fuel/oil mixing.
The supercharger creates enough air pressure to fill the cylinder with air. The fuel is injected at TDC to cause detonation.
All diesels have no throttle.

[W1GUH]

Isn't that going in 'AMR's Malibu?

[kc7jty]

http://www.dieselduck.ca/machine/01%20prime%20movers/diesel_engine/modified.ani.sulzer.gif

The exhaust valve/s at the top of the cylinder must begin to open slightly before the piston clears the intake ports at the bottom of the cylinder.

The 4 stroke diesel is 5 to 10% more efficient than the 2 stroke but requires a much larger mass engine to produce the same horse power.

The exhaust gasses power the supercharger.

[w2amr]

Isn't that going in 'AMR's Malibu? I'll have you know sir, it isn't a Malibu.:snooty:

[w2amr]

2 stroke diesels have crank case oil just like a 4 stroke and intake valves at the top of the cylinder. No fuel/oil mixing.
The supercharger creates enough air pressure to fill the cylinder with air. The fuel is injected at TDC to cause detonation.
All diesels have no throttle. The fuel is ignited by compression. It would make sense that the fuel is injected a few degrees BTDC. Otherwise the compression would blow it right back out. No?

[kc7jty]

The fuel is ignited by compression. It would make sense that the fuel is injected a few degrees BTDC. Otherwise the compression would blow it right back out. No?

That's the thing I still don't fully understand about diesels. It must be very quick through a one way valve and if it's before tdc it is by a very minute degree.

[kc7jty]

Notice the crankcase is walled off from the piston and cylinder in the diagram, and there is a 2 piece connecting rod.