… he ratio numbers the faster the prop will be spinning. With tug boats, you want a gear box with a high ratio like 6:1,7:1,8:1. You could using larger props as well. Examples http://modelfireboats.com/sys_files/images/page/forumratiotable.jp …

… een about for far to long prob about 25 years and are ok in tugs slow turning props , these graupner motors are a lot better built and more flexible peter

HI Tidtug, got any pictures of your crew?