Sheldons Train Set

Not sure about the O gauge trains but the HO set he runs is a Bachmann Railking set.

One of the prior episodes shows Sheldon when he first gets

his HO set, which I think was a Bachmann set.  Initially, he wanted

O Gauge "it's O Gauge or no gauge." But he was thrilled at the

smaller size of HO trains, and even went to pop a small N Gauge car

in his mouth.

There are at least two train-related episodes. One where he gets his

HO set, and another when he is operating his loop layout on the floor.

In typical Sheldon behavior, it upset him that there were so many people

in his room (3, counting him), so he told them to go away. Brilliant show.

I do not think it is a set, I believe it is a MTH railing engine and caboose the cars are a collection of Lionel and MTH I think.

I think the O Gauge trains change from time to time. The episode I watched tonight clearly had a 3 dome tank car I never seen before.

OK, here are the model train references from Big Bang Theory that I've found:

Season 5 Episode 3:
-The Pulled Groin Extrapolation

Sheldon goes to a train store off-camera shopping for model trains.

Before the visit, he says he wants an O Gauge train, saying "Its either

O Gauge or no gauge".  But in typical Sheldon fashion, he changes his mind.

http://youtu.be/jCNrs23r4DA

He even calls himself an "HO Trainiac", so case closed, no actual

O Ga trains on the show, so far.

Season 7 Episode 10:

-The Discovery Dissipation

Sheldon plays with his HO scale oval layout in his bedroom with Amy and Wil Wheaton

http://youtu.be/nqlXn91jDJM

No O Gauge on BBT, but HO and one N Gauge car or locomotive that Sheldon

pops into his mouth.

If you search Google for something like "picture of Sheldon's room", you'll see he does indeed have O gauge trains on top of his drawers (immediately above the comic book bins). There also looks like at least one loose flat car with a rocket below the train.

The trains in Sheldon's room according to WIKI are 6 Lionel cars, but they don't say which one's they are.

Wow!  Lionel or MTH should do some research on this, and actually create a SHELDON TRAIN, for those who are so addicted.

I found three different photographs - each showing Sheldon's O gauge rolling stock in different configurations. I count a total of seven pieces of rolling stock in all (including the yellow/black tank car).

Looks like something the prop department put together. If I were to venture a guess, the locomotive is a Rail King F3. The others look like Lionel, except for the caboose which looks like an MTH.

Here is two of them:

Denver & Rio Grande Western A.A.R.Standard Dbl-Door Boxcar
Lionel 6-27205

#6414 Evans Auto Loader
Lionel 6-39450

One of them looks like an aquarium-type car but it has me stumped.

Could the locomotive be:

Bachmann Santa Fe blue & silver F-3
Model: 20185 ?

Also.....

Lionel Lines O27 Flatcar (Black) w/ Rocket #6175

6-39457

Engine is a Railking Rugged Rails F3, and I'm almost certain it came out of THIS MTH RTR set. I've got the same engine in B&O colors. 

Also the caboose from the set SJC identified is also a match:

Offset ATSF blue/yellow caboose

MTH Product Number: 30-77129

Any ideas on the car that looks a bit like an aquarium car?

I agree with Matt, however I think the aquarium car my be a MTH knock off, I think they made one a while ago.

 I have high functioning Asperger's, and collect trains. So, Sheldon is my TV hero. One of the few "people" on TV I can stomach. Ok, I don't mind watching Penny, Penny, Penny too much either.Glad I found it. I don't watch TV often. Missed most good shows over the last 20-30 years until they hit late night re-runs, and I caught one after the news, or avoiding political bull pucks, shot from either side. Good TV, rare.

 The blue aquarium car(I see blue) is missing one of my favorite "features". The 3-D "L" logo in between the windows, up high & center. Gotta be a knock off! What did K-line with the real water look like?

Industrial Rail, Penn Salt is my guess on the tanker. Nice, if that's it.

Great research, guys!

 It is an MTH Rail King 30-79114 "Poseidon Sharks" aquarium car from 2005.

Thanks for all the replies. Maybe Ill email the shows producers and se if they can give me a definite description or idea of what trains they are, it would be nice to put it together if its not already a set.