The last poster wins!!!

[Brisky]

I wonder if they're gonna move this thread to the music board, just like they moved the counting thread to the chatter board...

[Bricket]

Let's see to find out

[Cheza]

I highly doubt it.

[Bricket]

Guess we need... MORE
SINGING!

[Cheza]

The singing doesn't really change the main purpose of the thread or anything, which is to just try and score the last post somehow.
A post with a song text is still a post, after all, and it could very well be the last one too if the stars were to align.

[Bricket]

Is that a challenge I notice? 

[Cheza]

Nope, just me saying things as they are. :P


We could literally be posting food recipes in here and it still wouldn't change a thing.




Cabbage-thing



- Shredded cabbage
- 400g minced meat
- 1 Onion
- 2-3 sliced carrots
- Beef stock cube
- Black pepper (powdered)
- White pepper (Powdered. Careful with this one, but that probably goes without saying xP)
- (Optional: Mild curry powder. Careful with this one too. It's supposed to be barely noticeable if following this recipe.)
- (Optional: Soy sauce.)
- (Very much optional: Blood of a woof Actually no, I was just a little too careless with the knife >->')
- (Optional: Whatever else you feel like adding. I put mushrooms in this once, and it turned out nice.)




Brown and spice the meat and put it aside
Toss the cabbage, carrots and onion into a frying pan and stir them around until they've changed color slightly.
Add the meat and the vegetables into a large cooking pot and add ~2dl of water, along with the stock cube (and a dash of soy sauce).
Leave it to simmer for at least half an hour, tho the longer it's left alone, the better (apparently). Add more water and/or spices if needed. Can be eaten as it is or with rice/potatoes.

[Bricket]

How to replace a railroad tie?
First you disconnect the bolt that connect the rail and tie;
Then you dig 5 cm beneaht the object and then pull it away either physically or mechanically.
After that you dig a hole of 20 cm beneath the former location of the tie.
When that is done you pull the new tie beneath the track and you lif the object up.
That's the moment when you please the new railroad tie in place by connecting new bolts between the rail and tie.

Afterwards you can strengthen the trackbed

[Brisky]

The main diffirents between a PWR (pressurised water reactor) and a BWR, (boiling water reactor) both light water reactors,  is that the former consist of two coolant cycles, while the latter only consists of one.

The PWR's primary coolant system uses light water as coolant, at a temprature of aprox. 275 degrees C. The coolant remains liquid, despite the high temprature, because of the high pressure (up to 155 BAR) in the reactor vessel.

The primary coolent then heats up the secondairy coolent in the steam generators, wich powers the steam turbine generators.



Boiling water reactors have only one coolant system. The coolant is used both for cooling the fuel rods as well as to be turned into steam for powering the steam turbines.




Both reactors use their coolant water as neutron moderator.

The water slows down the high velocity neutron, allowing them to interact with the fuel rods, allowing the nuclear reaction to be sustained.

Because both reactors use water as a neutron moderator, both systems naturally have a negative temprature coëfficient. This means that as the temprature in the reactor rises, the reactivity of fuel starts to decrease, causing the reactor to power down untill the temprature decreases again. This makes the reactor more stable to controll, as well as help prevent damage to the reactor core due to overheating.

The negative temprature coëfficient can be explained by the expansion of water creating more space between the water molecules, thus decreasing the moderative capabilities of the water, and allowing less neutrons to interract with the fuel.


The biggest advantages of PWR's over BWR's are the following:

-Because of the higher pressure in PWR's the coolants moderative capabilities are naturally higher than that of the BWR. This allows for a smaller reactor vessel for a reactor of the same power. Thus decreasing the reactors size as well as cost.

-By having two seperated coolant systems the PWR prevents radioactive contamination to reach to steam generators, and steam turbines. Therefore these systems will, unlike the BWR, not need radioactive shielding.


Disadvantages when compared to BWR's are:

-Because of the high pressure of the primary coolant, the reactor needs highly strenghtened piping, and vessel construction, as well as increase the consequences of a rupture leading to coolant loss.

-The neutron flux from the reactor can cause the steel from wich the reactor vessel is constructed to become brittle over time, limiting the reactor vessels lifetime.

-The high temprature coolant water with boric acid dissolved into it can cause radioactive corrosion to most metals.

[Bricket]

Both diesel and gasoline engines convert chemical energy from fuel into mechanical energy through a series of explosions. The way these explosions happen is the major difference between these two engines.
In a gasoline engine, the explosion process is:Intake stroke – fuel is mixed with air

• Compression stroke – piston goes up, mixture of fuel and air is compressed
• Ignition stroke – fuel/air is ignited through the use of a spark plug
• Exhaust stroke – piston goes up, pushes exhaust through the exhaust valve

In a diesel engine, the explosion process is:Intake stroke – intake valve opens, air in, piston goes down

• Compression stroke – piston goes up, air compressed (heated in excess of 540°C)
• Combustion stroke – fuel is injected (right time), ignition, piston goes down
• Exhaust – piston goes up, pushes exhaust through the exhaust valve

Diesel engines have no spark plug. They need high compression ratios to generate the high temperatures required for fuel auto ignition (the higher the cetane number, the better the ignition).
Compression is much higher with a diesel engine (14:1 to 25:1) than a gasoline engine (8:1 to 12:1). Gasoline engines use lower compression ratios to avoid fuel auto ignition (engine knock). Higher compression ratios lead to higher thermal efficiencies and better fuel economies.

[Brisky]

Now gimme a two-stroke cycle! >

[tnoi]

A two-stroke (or two-cycle) engine is a type of internal combustion engine which completes a power cycle with two strokes (up and down movements) of the piston during only one crankshaft revolution. This is in contrast to a "four-stroke engine", which requires four strokes of the piston to complete a power cycle during two crankshaft revolutions. In a two-stroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust (or scavenging) functions occurring at the same time.


Two-stroke engines often have a high power-to-weight ratio, power being available in a narrow range of rotational speeds called the "power band". Compared to four-stroke engines, two-stroke engines have a greatly reduced number of moving parts, and so can be more compact and significantly lighter.

[Brisky]

Does a two stroke engine with longtitudinal flushing require a camshaft? >

[tnoi]

i dunno

[Brisky]

Ah...

Well, spoiler alert, it does...


But why is it beneficial, and with larger engines, nececcary, to cool the inlet air from a turbochargers compressor side, before it enters the cylinder?