Scale EMD 567 or 645

[428Bird]

Curious if anyone has ever tried to build one. Apparently the blocks on the full size engines are welded up, not cast.

I was watching some live steam video's earlier and noticed that the diesel locomotives were either ran by battery, or a little gas motor.

Just curious.

Britt Bettell

 

[Wizard69]

I've thought about it but that is about it. The problem are many, one I'm barely a beginner, where do you find the prints and even for those with the skills it is a huge undertaking.

However that being said there would be nothing better than to put a real diesel into a G-scale or larger engine. We could even have it drive a generator for a true diesel / electric.

Interestingly you can find rebuild videos on youtube. Many of course are just advertisements but some have interesting shots of the machines. The nice thing here in my mind is that your could easily weld up the basic structure of the engine yourself saving the need to cast iron. However from looking at the pictures I'm not convinced that the whole machine is made from weldments. There is a lot of complexity in these machines, so a challenge for the highly experienced in my mind.

 

[428Bird]

What scale do things running on a 7.5" gauge track use? We could get some general engine dimensions (bore for example of 8") by scaling known dimensions down. Just to get an idea of amount of material needed, ease of machining, etc.

With the exception of the 567-U (which had a cast block top) everything is constructed of weldments. I assume this would exclude the heads.

Britt

 

[a274]

liner, piston, connection rod and head are called power pack and are held into the block by crab and nuts, the camshaft is on top
some of the engines are air started
they are simple (2 cycle) engines
the injectors will be the hardest to make ( very large Detroit Diesel injectors)

 

[Bastelmike]

What scale do things running on a 7.5" gauge track use?
Britt

Well, for the commonly used 7.25"/184mm gauge the scale is 1:8. The 7.5" gauge is only used in several Areas of the US (eastern area?) and exists nowhere else in the world.

Mike

 

[428Bird]

Well, for the commonly used 7.25"/184mm gauge the scale is 1:8. The 7.5" gauge is only used in several Areas of the US (eastern area?) and exists nowhere else in the world.

Mike

1:8 scale, that's 1/8th inch per foot right?

In that case, the scale 567 bore would be 1 inch.

Britt

 

[Bastelmike]

Hi Britt,

no sorry. 1;8 is the european Scale type. It means 1 Inch is equivalent to 8 Inch. or 1.5 Inch per foot

 

[428Bird]

1.5 inch per foot is 1/8th scale.