I did a search for "Blackhawk 32 model yacht" and found a mix of pictures. One site showed a fairly conventional fin and bulb yacht.' of similar size to a Victoria, but with a longer fin and a bit more sail area.
There is a similar boat in my club, so from that, fin about 18" long, bulb about 2lb. Width will probably be indicated by the socket in the hull. Rudder about 5" by 2.5".