MTU Engine

[Frank the soldier]

What is the different to this pics ???
The Ring-Cooler (Water ) is different. But Why???
look the first pic :
http://i20.photobucket.com/albums/b216/Eurocopter/Kopievons_strv122motor.jpg
http://i20.photobucket.com/albums/b216/Eurocopter/LandmachtDagen2005Arnheim048.jpg

[flanker7]

I don't know, but I'll take a guess. Maybe something to do with smoke generation? Like spraying fuel on the exhaust?

Worth a shot anyway :(

[Ipkiss]

Hmm this beats me too. It might be the upgraded KA-501 engine (1650 bhp instead of 1500) but I still don't know what they are. Intakes or outlets? And for what? NOS? ;)
I'll post this pic to some guys who know a lot more about this. We'll see what they say. Interesting though.

[Jippo]

Don't know **** about Leo's but they must be outlets. They are in the in-going air side, and looks like they are used to inject something in the air before it goes through the radiators.

Fire extinguisher? Some kind of extra cooling?


-jippo

[Frank the soldier]

Because for the anti-iceing ???
The german and the nederland don´t have this.
But the Sweden has it. So in Sweden the winter is very,very cold.
is this the right think ???

[Jippo]

The best way to heat an engine like that is to heat the cooling fluid directly with a heater that burns diesel. I doubt that it is heating for this very reason.

Russian tanks for instance use this type of heating, as do many cars and bigger vehicles up here(&there).

One example:
http://www.webasto.de/am/de/am_trucks_heaters_5123.html

Any Swedish tankers in here?


-jippo

[Harpago]

They are indeed outlets for the engineroom ventilation.

The Swedish LEO cooling systems are diffrent then other leos. The intake for the air is through the gills on the sides and the outlet is on the back of the tank instead of on the sides like the other models.
This will aid the wagon in lowering its heat signature by eliminating the "Mickey mouse ears" that will be visible on each side of the wagon when viewed through a thermal sight.

The fans create a underpressure in the black extractors and the air inside the engine compartment is sucked through them into the coolers. unlike other models where it is open between the engine and coolers.

I hope you understand what i'm trying to explain.

[DeadMeat]

Here is the answer:

From the manual I got the following information:
It´s the outlet for the engine room ventilation. The ventilation air is drawn in from the grilles on the sides of the hull, then it is drawn out of those two pipes by the suction of the cooling fan. The vented air is then forced out through the rear grille with the rest of the hot air from the radiators.

The ventilation system is closed if the fire suppresing system in the engine room is activated. I guess this is to prevent more oxygen to reach the fire, and thar the supressing halon gas is vented.

I wondered why they did it this way, and how did the system worked before?
I found out that on the older Leopard engines, like the ones used in the Strv 121 and dutch/german vehicles, the venting takes place the other way around. Some of the air sucked in from the outside by the radiators are pushed forwards into the engine room and out through the grilles on the sides,
The drawback of the old system is that you push hot air out through the sides and get a larger heat signature when seen from the front. The way Strv 122 does it, the hot air is pushed out the back, together with the other hot air from the coolers and from the exhausts, and blown downwards by the rear grilles, hopefully not being seen from the front.

In addition from reducing the thermal signature it can also shut down the ventilation during a fire. I am not sure, but I belive the old system didn´t do this.


Here are a bunch of images of the Strv 122 engine, including a pic extremely similar to the one on top.. I propably know the source of that one :D

http://www.plasticwarfare.com/articles/leoengine/index.asp

Ok, I see someone else replied also.. :)

/DM

[Frank the soldier]

This is a great engine :
http://i20.photobucket.com/albums/b216/Eurocopter/MTUMotorLeopard212.jpg

http://i20.photobucket.com/albums/b216/Eurocopter/MTUMotorLeopard26.jpg

[Ipkiss]

I'd rather have the 2000 Bhp powerpack :roll: (including the airco)