I acquired an exceptionally nice working model of HMS Avenger, the Type 21 class frigate, which I believe is 1/72nd scale. The hull is wood and so is the majority of the superstructure.
It’s a gorgeous example and has many working features, so after I’d modernised the ESC and receiver, it was pretty much ready to go. It weighs an absolute ton with all the ballast that was already in the boat when I bought it, so I went down to my club’s pond to try it out. Put it in the water with three Lipo batteries (one per esc and the third to power the lights etc) but without the superstructure and was nice and level, so took it out, put the superstructure on and lowered it into the water. This time it had a severe list to port. No problem, moved the batteries over a bit and tried again, now listing to starboard! Tried fiddling about, but could not get it balanced, so the safest thing I could do was surrender.
Today I had a go levelling it up in the big paddling pool I have to test out boats. Exactly the same problem as yesterday, all ok without the superstructure, but when I added it back on, it listed severely to port. I added a bag of ball bearing in a bag just loosely on the top starboard side, which with a lot of trial and error, got close to the right amount, so placed it inside the hull on that side. At first it looked like I’d won the battle, but it’s been windy down south today and as soon as a gust came through, I had to quickly grab the boat to stop it going over.
I’m in need of experience, as I know these type of models are prone to need ballasting right. Can I assume I need to put a lot more weight in the centre of the boat on either side of the hull to get it sat lower in the water? Personally I think it maybe too high in the water anyway, but I could do with the help of more experienced modellers please.