Hey Bob. Great to see your attitude is much different to most of the people I have seen with this idea. Going by some of your other achievements, you are more than just a dreamer too.
I also made a Hotrod, well sort of. An oldish Nissan
that I then fitted a 2JZ supra turbo engine
into and got it to run in the 10 sec range for a fraction of the price
of what other 10 second cars cost. It used the same amount of fuel
as it did before I modified the car and I drove it everywhere, when other slower cars were turning up at the drags on trailers. I was told my methods would not work and my engine
would explode because I did not use the same gear
everyone else uses and never had it dyno tuned. It then got on the front cover of my favorite car mag.
I would still like to see your own version of a more detailed energy budget
of your whole system based on observed figures rather than some of the optimistic figures you have used. My admittedly rough calcs have your boat being able to motor
for around 2.5nm per day on average with zero consumption
other than propulsion
etc). I think this could be dangerous. With such a low energy surplus you will be sure to run out in the worst of times IMO and the performance of your boat to windward will be marginal at best.
Also, you would be surprised at the small amount of power your sails
produce to move your boat. Considering how inefficient props are, your boat will need some VERY strong wind
from behind to overcome the power figures you are listing will be generated from your props. For example my friends heavy 35 foot boat motors at up to 4k with the 2hp tender motor
in flat conditions. Imagine the drag of that same 2hp working backwards. It will be like dragging a sea anchor
. You wont be going upwind while towing this, which means you will have to claw
your way back upwind after one of your proposed charge up trips if you want to get back to your destination
. The catalac
is not great upwind boat, and that is before you have added all that gear
making the situation even worse. I do not think charge up trips will be feasible in most cruising situations. It might work when passage
making, but when the wind
is strong enough for it to work, you will not need it since, well the wind is up