2 stroke engine?

snoman, do you know where i could find a diagram on how the detroit worked? I have only seen the four stroke. I'm not bashin on you, I just try to learn something new every day. Just today a mechanic was telling me of a recipricating engine used for extra power in some war bird. I have to look that one up too.  
it's more like a pebble crawler

SnoMan:
No you are not quite on task with the reason they run so well. If you get real scientific with a old carbed snowmobile you have a selection of jets because as altitude and temp range changes, so does optimum jetting. You can enrichen fuel sure but you still have to vaporize it more when it is cold and that takes heat because air cools as the fuel vaporizes and the cooler the air the slower the vaporazation and the less fuel it can support in a vapor state (this is why you "choke" a cold engine) With a 2 stroke once it is lite the mixture is drawn into crankcase and mixed and compressed heating it some aiding vaporization. It is then discharged into cylinder and recompressed and mixed again and burned. (all this turbulence in mixture from this aids vaporization and mixing of fuel and air) As engine warms up it preheats incoming mixture in crankcase even more and the result is fuel is well vaporized and mixed. It usually just takes but a minute or two to warm engine enough to require no choke anymore. This is not the case with a carbed 4 stroke in cold weather and mixture needs to be kept richer longer and sometimes never fully gets of choke in extreme cold. As far as the melt down he mentions, the only time I have ever seen it is in a hot engine on a warm day that is either too lean or has too hot of plug or from detonation. (two strokes are really best run on 89 octane or better)

In my last post, I was not compairing 2-stokes to 4-strokes in how they run in the cold.  I was only talking about 2-strokes and how they run in the cold compaired to warm weather.  Also I was mainly refering to liquid cooled 2-strokes.  Carbureted 2-stroke snowmobiles do not come with the optimum jetting from the factory, like I stated before they are jetted to not melt pistons at -30*F.  Back 10 to 15 years ago, I knew of people that bought new snowmobiles each year and would keep jetting down until burning pistons to find their base line of jetting (then put them back to factory jetting and have the dealer fix it under warranty), and most of the time they were about 4 jet sizes smaller than factory (leaner).  Then after they got the snowmobiles back they jetted one size above jet that caused the melt down at the given temp. and just changed jetting as temp. required.  The higher the altitude, the thinner the air (less oxygen), and the engine has to be jetted leaner accordingly.  I have seen 2-strokes burn pistons for all kinds of reasons, (I work on them year round).

I do believe that you understand 2-strokes snoman, it just didn't quite seem to come out that way in your post but that was most likely due to you jumping back and forth between talking about 2-strokes and 4-strokes.  I do understand 2-strokes snoman.  I run my 2-strokes on 92 octane and the heavily modified need higher octane yet.  

There have been 2 strokes used in a number of production cars. My favorite (about which I wish I knew more) was a German car.
When I was in high school (yes, these are old memories) we found this car in an old guys backyard. It is difficult to describe, but if you can picture an old Rolls Royce, with the big swooping fenders, but 2-door and with suicide doors. The engine was a 3 cylinder, air cooled, 2 stroke with coil on plug. 4 speed and front wheel drive. The old guy told us that he had brought it back from Europe after being stationed there in WWII.
An amazingly cool looking vintage car. It would probably be impossible to restore, but I occassionaly wish I had talked him into selling it anyway. The nose was long enough (again, picture the old Rolls) that it would not have been difficult to drop in a modern front wheel drive driveline.  

burnzya:
snoman, do you know where i could find a diagram on how the detroit worked? I have only seen the four stroke. I'm not bashin on you, I just try to learn something new every day. Just today a mechanic was telling me of a recipricating engine used for extra power in some war bird. I have to look that one up too.

Below in the first link is a very good description of how a 2 stroke diesel works.

How a 2 stroke diesel works

This next link is about the most powerful diesel in the world at this time. It is also the most efficient diesel engine ever made and it is a 2 stroke design too. Each cylinder displaces 111,143 cubic inches or 1820 liters and make about 7780 HP per cylinder.

Worlds most powerfull diesel.  

i have yet to fully read all the posts on this thread...

I own a suzuki 4x4 with a three cyl. 2 stroke, it looks like a scaled down jeep, the rear end broke then it sat for a few years and motor stuck, i still need a rear end...it was a good putter that didnt do well in the mud, it still has the stock wheels with dean traction tires.  it's very slow but a lot of fun years ago.  
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burnzya:
snoman, do you know where i could find a diagram on how the detroit worked? I have only seen the four stroke. I'm not bashin on you, I just try to learn something new every day. Just today a mechanic was telling me of a recipricating engine used for extra power in some war bird. I have to look that one up too.

SnoMan:
Below in the first link is a very good description of how a 2 stroke diesel works.

How a 2 stroke diesel works

This next link is about the most powerful diesel in the world at this time. It is also the most efficient diesel engine ever made and it is a 2 stroke design too. Each cylinder displaces 111,143 cubic inches or 1820 liters and make about 7780 HP per cylinder.

Worlds most powerfull diesel.

wow, thats alot of motor!  
STAND ON IT!!!

http://suzuki.off-road.com/suzuki/article/articleDetail.jsp?id=277664

I don't have any pics of mine, here's a look at a little history.  
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burnzya:
snoman, do you know where i could find a diagram on how the detroit worked? I have only seen the four stroke. I'm not bashin on you, I just try to learn something new every day. Just today a mechanic was telling me of a recipricating engine used for extra power in some war bird. I have to look that one up too.

SnoMan:
Below in the first link is a very good description of how a 2 stroke diesel works.

How a 2 stroke diesel works

This next link is about the most powerful diesel in the world at this time. It is also the most efficient diesel engine ever made and it is a 2 stroke design too. Each cylinder displaces 111,143 cubic inches or 1820 liters and make about 7780 HP per cylinder.

Worlds most powerfull diesel.

chopperfreak2k1:
wow, thats alot of motor!

The RPM it develops max HP at is fascinating too!  

snoman, those are just real small people building a normal engine , what the hell is that used for?  

79tubeblzr:
snoman, those are just real small people building a normal engine , what the hell is that used for?

Marine usage (powering super tankers and such)  

it would be far more efficient to use nuclear power than something that giant, cant even imagine the fuel usage, no wonder we are going to run out of oil.  

Well 50% plus efficiency is very good for a motor as most are about 1/2 that (like cars and SUV's) As far as nuclear power if it expensive even heavier to install. It maks sense for military with unlimited pockets but not commercail shipping. Consider this, battleships of WW2 used about 3 to 4 times as much fuel and more and full power (over 6000 gallons a hour) and we had large fleet of them roaming Pacific that had to be refueled at sea too. (they could not carry enough fuel for long trips at max power)  

what was it......the enviormentalist' that got rid of the nuclear plants? now who are the ones allowing us to use up all the natural resources?  
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I think it is about about using what we have more wisely and with greater efficiency starting with cars and SUV's and commercail transport. Also do not get me going on commercail air plane flight as there is too many of them and that needs a look at too.  

yep,......

I won't go if I can't drive there or fly myself.  
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see me at robsoffroad.com