Humm???....Colin
That's just what I thought at first. But, after some more thinking it was clear that in a shallow draught hull, compared with a deeper one, the "Inwedge" and "Outwedge" form a much greater fraction of the total immersed hull volume. As a result the Centre of Buoyancy will move much further and raise the Metacentre higher and ought to increase the righting couple created by the Upthrust and Weight acting on the model.
The Metacentric Height of this model was not measured but I did check its stability by placing weights on top of the superstructure. No signs of instability was observed until more than half the models original weight had been added!
This sort of model, I suppose it could be considered to be a working RC waterline model?, might not appeal to everyone. But, as a quick and economical means of creating something that looks reasonable and sails well, it's worth considering. I'll definitely use it again.
It also fits in well with my Engineers approach of "what you don't put into something, doesn't cost anything, doesn't weigh anything and cannot break". Plus the light weight means its easier on my back when launching and recovering!
Glynn Guest