Testing HP figures for big diesels

[Anonymous]

After recently reading about massive horsepower figures of large diesel engines, it got me thinking about how would you know if those figures were accurate? How is this measured, or is it based of calculations on the engines specifications? I can’t imagine a huge dyno doing this.

How do you fine tune a diesel to get max horsepower? Is there a mixture screw:P

When a manufacturer says their diesel has 10500hp, how would you know that you weren’t getting ripped off. It may only supply 9500hp and only at say 7000rpm.

Secondly, to compliment my large diesel turbo talking piece courtesy of TB, can anyone get me a massive (huge!!) piston, preferably with a conrod attached. I am talking about one that is going to be thrown out or dumped. It doesn’t matter what condition. Part of the fun of having one on display in the shed would be cleaning it up.

[GregMember]

7000rpm !!! try 10400hp @ 104rpm !

[Anonymous]

wow only 104rpm!

Think of how many hp then, if ya revved it hard to the limiter at 7000rpm! Probly about 700000 hp.

[DavidMember]

slug wrote:

Quote:

wow on 104rpm.! Think of how many hp then, if ya revved it hard to the limiter at 7000rpm! Probly about 706730.77 hp.

Yeah after carefully measuring Betty I am sure it will fit that in….can I order one:laugh: :laugh:

[dennis da menaceMember]

that many horse ponies gives me a chubby:ohmy:

menace

[Anonymous]

So seriously, how do you measure it? I’m curious, but not bi-curious.

[GregMember]

Just wait slug am working on something!

[Anonymous]

A big piston for me??????????????????

[DeanMember]

slug wrote:

Quote:

So seriously, how do you measure it? I’m curious, but not bi-curious.

Torsion meters,tonnes of fuel burned per hour at full power, plus other variables Ill let TB explain as this is his field of expertise. PS Slug thay dont just throw these pistons away:laugh: they send them back to the manufacturer and they are refurbished to new again were talking $50,000 for a piston!

Ps the diesel that I was referring to was a medium speed diesel 520 RPM max

I did work on a 2 stroke diesel that did 132 RPM max,to clean the ports you stood on the piston crown and they turned the engine over using turning gear to lower you down the bore! Dirtiest job Ive ever had to do:S

ollie

[Anonymous]

Ollie wrote:

Quote:

I did work on a 2 stroke diesel that did 132 RPM max,to clean the ports you stood on the piston crown and they turned the engine over using turning gear to lower you down the bore! Dirtiest job Ive ever had to do:S

ollie

Typical stinking, oily, smokin’ two strokes. You wouldn’t get need to do it on a Yammy 5 valve head four stroke diesel:laugh:

[DeanMember]

slug wrote:

Quote:

Ollie wrote:

Quote:

I did work on a 2 stroke diesel that did 132 RPM max,to clean the ports you stood on the piston crown and they turned the engine over using turning gear to lower you down the bore! Dirtiest job Ive ever had to do:S

ollie

Typical stinking, oily, smokin’ two strokes. You wouldn’t get need to do it on a Yammy 5 valve head four stroke diesel:laugh:

Maybe but you should have seen the Carbon Fibre Pipe guard:woohoo:
ollie

[Anonymous]

It’s spelt GUARD. I need to learn ya how to spell gooderer

[GregMember]

The Most Powerful Diesel Engine in the World – 81,000kW!

 
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 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 it’s most efficient power setting, the big 14 consumes 1,660 gallons of heavy fuel oil per hour.

Main Brgs going in

12 cylinder

Bottom end

TB

[Anonymous]

Gee, you would need a big set of sockets and spanners to work on that sucker. The torque wrench used must be gigantic!

[Nick AgainMember]

Many years ago, like during my school holidays, I sometimes got to work with the oldman at a shipping Company in Nth Qld. One of the “special jobs was to go into the bilges and “slide about under the engines and tighten flanges, look for leaks . This boat had 3 cyl Diahatsu motors, I thought they were Huge?? It ghad a Torque wrench in one of the “Duck pella”( ?spelling of that) Room, It Was HUGE! I was left thinking it must be used in conjunction with the gantries. I could never imagine any one ever picking one up! TB..I LOVE the Pics. This kinda thing is awesome, IMHO!!

[Author]

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