I run 2 rail O scale without tires and my G scale has tires. When I group 4 engines together on either layout, it not only looks impressive, the pulling power seems to be off the charts. I said I thought my one gauge Triplex could pull a tree stump. I bet four diesels, would do it even easier! Even without tires, it's hard to hold them back.
I have a grade just under 2% outside. When I load up the train with a lot of cars, it's actually hard to pull them up by hand. So I know the engines have to work at it. I explain it to our grandson, but I bet he doesn't get it fully or care? He expects them to do it repeatedly when it's near 100 degrees with the smoke on in the sun. So I add engines to make their life a little easier.
I have to imagine how good your engines look in person. I do know from experience, how good they work together to get the job done.
Some people prefer steam. I love a big diesel consist working as a team.
Very, very nice.
now where's Tommy Z? 
