This is my tug Alte Liebe. it is a Caldercraft kit and is almost 1 metre in length. I have installed an MFA 540 motor with a 2.5:1 reduction gear and operate her on 6 volt SLA's. With ballast she is fairly heavy coming in at about 15 kg.

I have just added a photo of my tug breaking the Ice on our lake a couple of weeks ago.(December 2012)