Hey everyone,

I'm currently building/designing a scale RC Sailer. It's a complete scratch-build project, I made plans using some CAD computer program, and based my design upon some 2D plans from existing W60 boats (Bruce Farr Designs)

Specs are
LOA: 128cm / 50,4in
Beam: 34cm / 13,4in
Draft: 42cm / 16,54in
Mast Length: 180cm / 70,85in
Sail Area: Aprrox. 80dm² / 1240 sq.in.

Hull will be build in fiberglass using a mould (which I'm still building)
Keel will be a fiberglass / lead structure

Now, I'm currently building the keel itself, but I have *no* clue on how heavy I should make it. Are there any formula's I can use (knowing the length/beam/draft/sail area etc) to calculate the required bulb weight?

Or is gambling to better method, and finetuning during test-runs a better way? Guess not

Thanks!

(edit: some measurement added)