telescopic keel ?
I would like to travel down shallow rivers using a 50 ft sailboat, rather than have a fixed keel that limits depth, could I have a keel that would
travel or slide up into the mast?, a thin metal pole 4" or 6" diameter, incorporating a
wheel or rotating ball at the bottom of the pole and maybe a forward/backward hinge one metre from the bottom of the pole?
I would be most grateful for any help or advice no matter how crazy it may seem, thanks.