We're going to draw a diesel engine like in the image below. This might seem like a relative easy shape, but the TT sprites are very small.
We start the same as we did with the other tutorials.
Step 1
It might be difficult to draw the shape of that diesel engine, but it's isn't easy to explain how to draw it. I hope the image in Step 2 is clear enough.
Step 2
Now draw the roofs.
Step 3
Don't forget to draw the 'floor' of the engine.
Step 4
Now detail the engine.
Step 5
Now draw the other / and \ sprites. Don't forget the lighting.
Step 6
The back nose doesn't look very good, I think we better adjust it 
.
Step 7
Next thing to do is drawing the | views.
Step 8
Now we can draw the _ views.
Step 9
Reorder your sprite and add the transparent color.
Step 10
Congratulations! We just finished the diesel engine. I hope this tutorial was clear enough, because it's somewhat shorter than the other tutorials.
REVISION
