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View Full Version : SW7 ( or others ) details - If you known em, I have a question.



frogpipe
May 10th, 2013, 07:54 PM
There are 2 grills on the SW series, one on the front of the nose, and one on the top of the nose. On the SW1500, there's a very obvious grate that wraps around the top of the hood.

I assume the front one is a radiator to cool the engine. What is the TOP one for?

cascaderailroad
May 10th, 2013, 08:43 PM
For grilling hot doggies ... you can't have barbequed baked beans, because they just fall right through the grill.
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSFeNl0wjIagSizSN1wlQuS6a5Eom0aF 0jNCIpfmLdS7dfRwXVA (https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSFeNl0wjIagSizSN1wlQuS6a5Eom0aF 0jNCIpfmLdS7dfRwXVA)
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRbtPptUJuWM5_da_wc6tqbGSEC6cCBx pclQrfjf8dt2zs5MppR

frogpipe
May 10th, 2013, 08:51 PM
*smack*

:D

LOL

Azervich
May 10th, 2013, 08:53 PM
For grilling hot doggies ... you can't have barbequed baked beans, because they just fall right through the grill.

That's what PlayStation 3's are for

http://farm1.staticflickr.com/100/301992392_fa2d8a4f1a.jpg

lol'ed.
Cheers.

frogpipe
May 11th, 2013, 12:13 AM
This is NOT helping.... :(

cascaderailroad
May 11th, 2013, 01:44 AM
What ever was under there emitted alot of heat, so I would guess it was the radiator, and other parts that could be exposed to the elements (rain/snow ... as most of the heat radiated up).

I once tied up a 32oz can of baked beans to the side of my 1980 chevy malibu engine carbrator with a coat hanger ... we drove at 55mph, for 90min .... till I thought it was done ... It sure smelled done .... the can got loose, and got beat all up by the metal radiator fan, and KaBlooie ... there was baked beans all over the inside of the engine compartment of my car ... we had to hose down the engine and engine compartment ... Baked Bean, ala chevy malibu, FAIL !

We forgot to take down our Christmas window decorations, and a pair of morning doves set up a nursery on our window sill, the 2 black Katz are just absolutely livid about the situation, with, the mother and babies right outside the window screen. The baby doves got super fat and flew away ... Now a 2nd pair of morning doves set up shop in the same nest (Budgerigar Columbidae recycling I guess) ... and to top it off Wrens are building a bird nest inside my BBQ grill ... Time to fire up the "Barbie" !

PS: You can not sucessfully make a barbequed baked bean hoagie !

mjolnir
May 11th, 2013, 03:40 AM
The grille on the front of the SW-7 is an air intake; the grill on top of the hood is the radiator.

ns

jadebullet
May 11th, 2013, 04:29 PM
What ever was under there emitted alot of heat, so I would guess it was the radiator, and other parts that could be exposed to the elements (rain/snow ... as most of the heat radiated up).

I once tied up a 32oz can of baked beans to the side of my 1980 chevy malibu engine carbrator with a coat hanger ... we drove at 55mph, for 90min .... till I thought it was done ... It sure smelled done .... the can got loose, and got beat all up by the metal radiator fan, and KaBlooie ... there was baked beans all over the inside of the engine compartment of my car ... we had to hose down the engine and engine compartment ... Baked Bean, ala chevy malibu, FAIL !

We forgot to take down our Christmas window decorations, and a pair of morning doves set up a nursery on our window sill, the 2 black Katz are just absolutely livid about the situation, with, the mother and babies right outside the window screen. The baby doves got super fat and flew away ... Now a 2nd pair of morning doves set up shop in the same nest (Budgerigar Columbidae recycling I guess) ... and to top it off Wrens are building a bird nest inside my BBQ grill ... Time to fire up the "Barbie" !

PS: You can not sucessfully make a barbequed baked bean hoagie !


Way to turn a reasonable thread with a serious question in to the dumbest derail in the world. Oh, and then derailing your own derail. I hope you make a post soon asking a serious question and someone comes on and talks about how this one time, their uncle put a bullet in the fuse slot of their pickup so that the lights would work and it shot his nuts off.

Oh, and protip. You can't successfully cook baked beans in the sealed can because the can explodes. Or really anything canned. Cans cannot hold much pressure.


Edit: and yeah, the post above me is correct. It is similar to how it is on an SD40 or other hood unit, only reversed.

frogpipe
May 11th, 2013, 10:52 PM
With that information the diagram in the Owners Manual, while unlabeled, suddenly makes sense. The Radiator is up top, and the fan is up front.

I presume the air goes out the top due to Convection and the path of least resistance.

The thing that started me on this was looking at pictures and noting 2 different units - referred to as SW7m. One of which had a short box over the radiator with 2 circular fans in it. The other had a box right in front of the cab about half the height of the front windows of the cab. Both units were reported to have dynamic brakes.

It seems a bit odd to draw air through the radiator and then the resistor grid - but I'd suppose it would be possible so long as the higher then ambient temps were taken into account.

smash
May 11th, 2013, 11:15 PM
A little looking brought me to this page.
http://thecrhs.org/ConrailEquipment/Locomotives/EMD/SW8
It does specifically state that some unit did receive Dynamics. If you look at Lehigh Valley #259 you will see the fan right before the cab.
Kenny

frogpipe
May 12th, 2013, 12:17 AM
Here are a couple others, SW7s I think...

http://i1172.photobucket.com/albums/r568/PA626/Assorted Screenshots/CR9072l_zps20e89ef4.jpg
Conrail 9072

http://i1172.photobucket.com/albums/r568/PA626/Assorted Screenshots/tr_nw1221_zpsabe9cffe.jpg
Illinois Terminal Railroad 1221 (they had a #1220 that is identical)

frogpipe
May 15th, 2013, 01:41 AM
Here are a couple others, SW7s I think...


Conrail 9072


Illinois Terminal Railroad 1221 (they had a #1220 that is identical)

Definitve answer that I can find is this.

Conrail 9072's "box on the nose" would appear to be a similar modification to the work done by Union Pacific to create their unique SW10's, specifically the addition on external fans over the radiator for cooling, and the elimination of the mechanical internal fan.

On the UP SW10's, the front grill was closed off, and the air intakes were on the side of the "box on the nose".

Meanwhile, the ITR 1221 pictures actually does have dynamic brakes, and it is located in the box in front of the center cab windows.

It's location is similar to the dynamic of an SW8 (when present) but whereas the SW8 has a shorter engine block and therefore room inside for the dynamics to be housed inside the hood (albeit a hood that is flat right up to the cab), the SW7 has it in a box above the more traditional sloped hood.

http://www.northeast.railfan.net/images/tr_lv268.jpg
SW8 with Dynamic Brake