I have been building scale sailing models for many years for collectors and museums but with the advent of our first grandson I have decided to build a fully detailed R/C model of the trawler 'Ladysmith' at 1/48 scale for him to take down the local boat pool when he is older which is only five minutes walk from his house (lucky blighter). Thing is I only know the basics of R/C and am somewhat confused as to how long batteries last and motor sizes etc, I have a nice 545 motor and a slightly used 540 and some other stuff but my need is for battery info i.e how long would a 12v 1.2 Ah battery power a 545 motor or am I better off going for a larger battery. As this is a trawler of 1905 vintage I dont want it taking off like a Seacat so need to keep the revs in order, what is the best way to do this and the approximate screw rpm for a 2'' prop with the 545 behind it for the speed to look realistic?, I am also looking at building a sea going tug of the 1920 - 40 era later if anyone has any suggestions,
many thanks, Terry