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Not all items can be in stock at all
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Due to minimum order requirements and shipping charges we
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(We reserve the right to correct errors and change
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Item Description
The below is from the espee.railfan.net site
First
off, what makes a 'tunnel motor' a 'tunnel motor'. Or why
did these locomotives gain a special nickname.
These
locomotives were designed to operate efficiently inside
tunnels or snowsheds, giving us the first part 'tunnel'.
Motor is a holdover from the early days, when steam was
still king. Electric trams and trolleys were powered by
electric motors, and driven by a Motorman, hence the vehicles
were called 'motors' by the Motormen. Some engineers carried
this over to the then new diesel locomotives, and were in
fact quite correct. The electric traction motors actually
move the diesel locomotive, the diesel engine, simply drives
an electric generator or alternator, to supply electric
current to the traction motors. A diesel locomotive, should
properly be called a diesel-electric locomotive...
Who first coined
it, and how this nickname came about is unknown. But
it sounds and reads a whole lot better than 'tunnel diesel'...
SP
started to have trouble with high horsepower locomotives.
When the SD45's came along, the combination of long or numerous
tunnels, snowsheds and low speeds, found trailing units
in a multiple unit consist, experiencing high engine temperature
shutdowns. As units dropped off-line, the train speed dropped,
which increased time spent inside the tunnel, causing other
units to overheat and also shutdown.
The
SD45's, like most other locomotives of the time, draw their
combustion air, and exhaust their combustion gases at the
top of the locomotive. When running in their usual environment,
engine operation is quite normal. Inside a tunnel, the situation
changes, being enclosed the exhaust gases have nowhere to
dissipate quickly. So they collect near the top of the tunnel
roof, the trailing locomotives radiator fans, then draw
these gases in as well as any clean air, to heat exchange
with, or cool the hot engine cooling water running through
the radiator cores. However, as the cooling air is not cold,
none or little heat exchange can take place, so hot cooling
water is returned to the engine, which only makes it hotter,
until it exceeds the temperature limits. At which point
the engine management system will shut the engine down,
to stop any critical damage from occurring.
As
units shutdown a number of problems can occur. Any
shutdown units add their dead-weight to the train, instead
of contributing pulling power, The traction motors in the
running locomotives, having more work to do, can start to
overheat. If they exceed their short-time rating, they can
burnout, unless the engine overheats first... If enough
locomotives shutdown, the train can have less than the required
horsepower to actually move the train, and so stall, possibly
inside the tunnel. The crew can experience breathing
difficulties, due to build up of exhaust fumes. In the days
of steam locomotives, SP had similar problems, this lead
to the development of the Cab-Forward or Cab-Ahead locomotives.
In
an effort to overcome these problems in the diesel era.
Experiments were conducted to separate where the cooling
air was drawn from, and the exhaust gases were expelled.
The 'Elephant Eared' SD45's were the outcome. The metal
shrouds fitted over the radiators, caused the cooling air
to be drawn over the walkway, which meant inside a tunnel
or snowshed, the air at the bottom of the tunnel was hopefully
cooler than the air/exhaust gas at the top.
Having successfully
proved the theory, EMD developed the 'tunnel motor' radiator.
This was first applied to the 1972 delivered SD45T-2's.
The 'tunnel motor'
nickname, is actually applied to several slightly different
EMD locomotives.
The model designations
of, SD45T-2, SD40T-2 and SP's rebuilt SD45T-2R, have been
proved official by Don Strack, and this is what he has discovered:
------------------------------------------------------------------------
Once again, we
return to the question of when and if SD45T-2 was an 'official'
EMD designation.
The
recent discovery of records from EMD's Quality Assurance
Department shows that the very first frame from the first
Tunnel Motors, EMD order 7336, for SP 9166-9208, was laid
down on December 13, 1971. A notation in the QA record for
that frame clearly shows the model as SD45T-2. The first
unit was delivered to SP in February 1972.
So, yes, SD45T-2,
and the whole T-2 nomenclature, was pure EMD right from
the start; railfans and the railfan press were not involved.
With
the understanding that each department at EMD (Engineering,
Sales, and Service) was truly different in their methods,
the T-2 designation was definitely part of EMD's engineering
reference, with sales (locomotive specification books) and
service (product reference books) coming to the game a couple
years after the fact. An example of the Service Department
delay is that the service manual for the SD40T-2 is labeled
as 'SD40-2, with cooling system modification.'
Remembering that EMD means "Every Model Different",
my question was if the T-2 designation was from EMD, or
was it from the railfans. I have my answer -- it was from
EMD.
© Don Strack
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Item Description
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MSRP
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June 2010 Delivery
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Part #:
IM-69505 Duluth, Misabe & Iron Range [DMIR]
- SD45T-2 |
Click
on photo to see larger version. |
These “Tunnel Motors” are decorated for Duluth, Missabe and
Iron Range in maroon with the yellow arrow down each side. They come
completely assembled with wire grabs, etched metal grilles, prototype
specific details and Micro-Trains® couplers.
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119.95
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Pre-Order
86.37
In-Stock
89.97
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Order
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Part #:
IM-69511 Canadian National / DMIR [DMIR] -
SD45T-2 |
Click
on photo to see larger version. |
These “Tunnel Motors” are decorated for Canadian National in
red, white, and black. The large CN “Wet Noodle” herald is on the car
sides with the Canadian National internet address under it. They come
completely assembled with wire grabs, etched metal grilles, prototype
specific details and Micro-Trains® couplers.
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119.95
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Pre-Order
86.37
In-Stock
89.97
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Delivering July 2010
|
Part
#: IM-69501 Cotton Belt - SD45T-2 |
Click
on photo to see larger version. |
-07
9265 |
-08 9280 |
-09 9286 |
-10
9294 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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To Be Produced Sometime
|
Part
#: IM-69512 Bessemer & Lake Erie [BLE] - SD45T-2
|
Click
on photo to see larger version. |
-05
904
|
-06 905
|
-07 907
|
-08 908
|
-
|
-
|
|
|
119.95 |
Cancelled |
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Prior
Releases
|
Part
#: IM-69501 Cotton Belt - SD45T-2 |
Click
on photo to see larger
version. |
-01
9161 |
-02
9271 |
-03 9287
|
-04
9289 |
-05
9295 |
-06
9301 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69502 Southern Pacific - Roman Lettering
- EMD SD45T-2 |
Click
on photo to see larger
version. |
-07
9192 |
-08
9316 |
-09
9321 |
-10
9323 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69502 Southern Pacific (Roman Lettering)
- SD45T-2 |
Click
on photo to see larger
version. |
-01
9190 |
-02 9201 |
-03 9213
|
-04
9244 |
-05 9307
|
-06 9352 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM_69503 Southern Pacific (Speed Lettering)
- SD45T-2 |
Click
on photo to see larger
version. |
-01
9194 |
-02 9245 |
-03 9273
|
-04
9318 |
-05 9361
|
-06
9402 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69503 Southern Pacific - Speed Lettering
- EMD SD45T-2 |
Click
on photo to see larger
version. |
-07
9207 |
-08
9282 |
-09
9300 |
-10
9308 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
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Part
#: IM-69504 Union Pacific - SD45T-2 |
Click
on photo to see larger
version. |
-01 /
2849 |
-02 /
2853 |
-03
/ 4799 |
-04 /
4890 |
-05 /
4965 |
-06 /
4972 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69505 Duluth, Missabe & Iron Range
- SD45T-2 |
Click
on photo to see larger
version. |
-01
410 |
-02 411 |
-03 413
|
-04
414 |
-05 417 |
-06 419 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69506 Kansas City Southern - SD45T-2 |
Click
on photo to see larger
version.
|
-01
4501 |
-02 4503 |
-03 4505
|
-04
4507 |
-05 4509 |
-06 4510
|
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69507 Southern Pacific "Kodachrome"
- SD45T-2 |
Click
on photo to see larger
version. |
-01
9182 |
-02
9207 |
-03
9229 |
-04
9303 |
-05
9346 |
-06
9362 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69508 Cotton Belt (SSW) - SD45T-2 L-Window
Cab |
Click
on photo to see larger
version.
|
-01
9158 |
-02
9163 |
-03
9285 |
-04
9291 |
-05
9372 |
-06
9401 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69509 Southern Pacific "Roman" -
SD45T-2 L-Window Cab |
Click
on photo to see larger
version.
|
-01 9166
|
-02
9188 |
-03 9239
|
-04
9256 |
-05
9325 |
-06
9367 |
Pictures courtesy of espee.railfan.net with permission |
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119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69510 Cotton Belt "Bi-Centennial"
- SD45T-2 L-Window Cab road number 9389 available
|
Click
on photo to see larger
version. |
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$129.95 |
Pre-Order
93.57
In-Stock
97.47 |
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Part
#: IM- 69510 Cotton Belt - Bi-Centennial -
EMD SD45T-2 |
Click
on photo to see larger
version. |
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119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69511 CN/DMIR "Canadian National
/ Duluth, Missabe & Iron Range" EMD SD45T-2
Locomotive |
Click
on photo to see larger
version.
|
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Order
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Part
#: IM-69512 Bessemer & Lake Erie
EMD SD45T-2 Locomotive |
Click
on photo to see larger
version. |
-01
901 |
-02 906
|
-03 909
|
-04 910
|
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Part
#: IM-69513 Larry's Truck Electric Service
- EMD SD45T-2 |
Click
on photo to see larger
version. |
-01
9238 |
-02
9259 |
-03
9261 |
-04
9360 |
-05
9364 |
-06
9366 |
|
|
119.95 |
Pre-Order
86.37
In-Stock
89.97 |
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Item Description |
MSRP |
Our
Price |
E-mail
or reserve link |
Stock Checks:
Inventory is a fluid commodity. It changes by the
hour (sometimes by the minute). To retain our pricing structure
we maintain stock levels designed to turnover 6 times each
year. We cannot guarantee stock status till we have an order
in hand. All product is subject to prior sale. If we confirm
that we have it, and, while we are waiting for the order
it sells, you would be upset that we did not hold it.
We used to hold items but learned a VERY EXPENSIVE lesson.
When we held items for customers’ orders, the order
never materialized 80%+ of the time. We lost out on
the orders placed while the item was on hold. Also
we wasted staff time that could have been used to pull actual
orders.
Since we are well known for finding older stock the fact
that it may not be on our shelves at this minute does not
mean we can’t get it. So, as we spell out on our terms
pages, we don’t do it anymore. You may, however, call in and we will tell you if the items
are available and if possible attempt to locate what we
don’t have while you are on the phone. |
Last Update:
Friday, July 19, 2019 1:47 PM
, By GJC
|