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For the most part, Tugboat Engines are LARGE two stroke (or two stroke cycle) Diesel Engines which provide High Combustion Temperatures and Pressures, High Horsepower typically > 1000 and High Torque, at relatively low speed.

As an example of the two stroke diesel cycle engines ability to produce high horsepower and high torgue at low speed, The Union 6V Diesel was produced during World War Two as an engine for locomotives for the transport of industrial materials used in the production of weapons and armament. It was functionally an inline or straight block configuration, but because adjacent cylinders were actually offset from centerline by 6 degrees in opposite directions (cyl 1 offset to starboard by 6 deg from centerline and cyl 2 offset to port by 6 degrees from centerline, and so on) it was technically a V configuration. It was subsequently utilized by the Navy in a few instances as main propulsion for Yard Craft, mostly Yard Oilers (capable of hauling around 240K to 280K gallons of fuel to be loaded to ships at dock in a given harbor).

This engine produces in excess of 1000 horsepower at a maximum 325 RPM. It idles at 125 RPM, and at that idle speed produces very large smoke rings out it's exhaust stack. This was also a naturally aspirated diesel (meaning it had no blower or turbocharger). It was also a directly reversible engine in that to reverse your direction of travel, the engine had to be shut down, the camshaft shifted utilizing a dual direction air cylinder, a pinion gear mechanically moved into position between the starter gear and the flywheel gear, and the engine then was restarted in the opposite rotation, turning the main output shaft in the opposite direction. No transmission or reduction gear.

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2 stroke vs 4 stroke?

On a 2 stroke engine, each cylinder fires every time the piston comes up. On a 4 stroke engine, the cylinder only fires every OTHER time the piston comes up. 4 stroke engines have 4 strokes: Intake, compression, power, and exhaust. 2 stroke engines complete these cycles in only two strokes of the piston by use of ports in the cylinder walls. 2 stroke engines usually produce more power for a given weight/size. But, in gasoline engines, 2 stroke engines are typically less efficient (use more gas) and have much higher pollution levels (note: some newer "direct injection" 2 stroke engines do much better on pollution levels than the typical 2 stroke)


Least number of valves required at the top of a four-stroke cycle engine?

Two. Intake, and exhaust.


Working principal type description operation of shaping machine?

there are two stroke include in this forward stroke &return stroke during the forward stroke machine works means it removes the material from workpiece & during the return stroke machine remains idle


Will two stroke oil damage a four stroke engine?

while adding top end (valve train) lubrication, the oil will lower the octane rating of the fuel being used, cause massive carbon build-up, possible plug fouling, and lean mixtures that can cause overheating.


What kind of engine does a Eskimo ice auger have?

Eskimo ice augers typically feature two-stroke gasoline engines, which are designed for high power and efficiency in cold conditions. These engines often range from 33cc to 80cc, allowing for quick drilling through thick ice. Some models may also offer electric alternatives for quieter operation and reduced maintenance. The choice depends on user preference and specific drilling needs.

Related Questions

What is the difference between a 2 stroke and a 4 stroke lawn mower engine?

Four-stroke engines have a spout where you add oil to the engine. On two-stroke engines, oil has to be added to the fuel. (Four-stroke and two-stroke are also called four-cycle and two-cycle, respectively).


Why you prefer four stroke engine over two stroke engine?

Four stroke engines are quieter than two strokes, but have less power.


Are the tug boat engines are two stroke or four stroke?

All tug boat engines are four stroke engines, because this engine responces quickly in relation to maneuvering this kind of boat in any situation.


Why 2 stroke diesel engines are not used in two wheelers?

Two stroke engines will create a lot of visible smoke pollution and also more noise than four stroke engines. For these reason, many countries have required that all new motorcycles should be four-stroke.


Will four stroke oil damage two stroke engine?

You can use four stroke oil for a (very) limited period in a two stroke engine in an emergency. However it is not formulated for two stroke engines and is not recommended.


Are kawasaki motorcyles two stroke or four stroke?

Assuming you are referring to a street legal motorcycle (IE: Kawaski Vulcan, Ninja, etc.) these machines have four stroke engines. Dirt Bikes and such sometimes do not. Two-stroke engines generally use a fuel+oil mixture. (Such as a weed whacker) Four stroke engines generally have an oil sump. (Like a car)


Four-stroke cycle engines are more fuel efficient than two-stroke engines?

Unless we are talking about big diesels - Yes.


Distinguish 2 stroke from 4 stroke lawn mowers?

Four-stroke lawn mowers have a tube where you add oil to the engine. On two-stroke engines, oil has to be added to the fuel. (Four-stroke and two-stroke are also called four-cycle and two-cycle, respectively).


What is the difference between two stroke and four stroke engines in two wheelers?

The difference between 2stroke engines and 4-stroke engines are pretty much the same regardless of where the engine is used. To read about it, check out the related question below.


In two stroke engine Crankshaft how many revolution takes place?

A two stroke engine has half the strokes of an otto (or four stroke) engine, therefore it takes two crankshaft roatations to complete a cycle on a four stroke engine and only one revolution in a two stroke engine. There are several types of two stroke engines, the different types have to do with how the receive the air/fuel mixture, also you have two stroke diesel engines.


What are advantages of two stroke engines over four stroke engines?

There are a couple, less parts for one therefore lighter. Also, 2 stroke engines fire every time the piston comes to the top. Which means every stroke is a power stroke. 4 stroke engines fire every other time.


Why four stroke engines used in two wheelers instead of two stroke?

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