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About LinkBacksWhen looking at boat ads... how do they come up with cruising speeds? I was looking at an ad for a 44' Baja with three 500 hp... listed cruising speed at 50. How would that relate to top speed?
Cruising speed / Top speed
When looking at boat ads... how do they come up with cruising speeds? I was looking at an ad for a 44' Baja with three 500 hp... listed cruising speed at 50. How would that relate to top speed?
First boat - 1968 Starcraft 14' 40hp
Second boat - 1982 15.5' Glastron 115hp
Current boat #1 1987 Ski Nautique 230 hp
Currnet boat #2 - 2005 Magic DB 425 hp
Cruising is "typically" at 4000 rpm. Low cruise is 3000, normal cruise is 4000. 10mph per 1000rpm is probably "average" efficiency in cruise. It technically has nothing to do with top speed. Everything changes in most boats when you pin the stick(s). Less wetted area, etc. Stepped hull? That makes a big difference in BOTH cruise AND top speed.Originally Posted by Wishful Thinking!
V-bottom vs. Cats is also an apples-oranges deal. Cats generally will start packing air during cruise, making them more efficient.
BTW, I also answered your question in the 600/700SCI upgrade thread.
Last edited by Beer:30; 01-20-2010 at 05:54 PM.
Originally Posted by gn7
[IMG]MVC-039F.jpg[/IMG]
2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.
I always thought cruising speed was 3/4 throttle
Get the boat up and running fast then slowly back down until the boat wants to sink down. Each boat is different because ,power,hull design, and the amount of weight from passengers, etc.
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