Scaled Down Cruise Ship

[starcmr]

Hello there, this is my first post, go easy on your boy. The power/displacement ratio of cruise ships has grasped my attention, especially Royal Caribbean ships, which manage to move enormous weight with relatively little power. They require very little power for their weight. I want to build a 65' boat, and I love the idea of needing very little power to move. (I mean less than 50hp) So far I've found very little useful data about this specific idea. I know that the speed will be limited to 10 knots, and that's fine by me.

I feel particularly drawn to this idea because it opens up the realm of practical solar powered electric boats.

Thoughts?

Yes, your idea is feasible. A 65’ displacement hull moving at 10 knots can realistically run on under 50 hp if the hull is designed efficiently. Low speed and careful hull design make solar-electric propulsion practical.

 

[gonzo]

The whole SOR is full of contradictions. For example, crossing oceans at 10 knots with a beamy boat that has lavish accomodations and supplies for several persons. However, assuming 50HP at 3 gal/hr to cross New York to Lisbon is approximately 3400 miles. That would use 1020 gallons or 7242 lbs with no reserve. It also assumes that there is a dead calm all the way. It is not realistic.