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Old 09-09-2018, 08:08 PM   #109
Simi 60
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City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
Quote:
Originally Posted by Snapdragon III View Post
I think the ad listed above for Domino is a good example of cats using less fuel. check out the fuel consumption tables. I am not aware of any 65' monohull that can do anywhere close to 2300 miles on 2950gallons of diesel at 20 knots. What other 65' ocean going boat can go anywhere close to 20 knots with only 2x300hp engines?
Again, Domino is a custom build with attention to weight saving.
A couples boat, single cabin, extensive foam core and relatively light construction.
99% of power cats are not.

The above would be something like a 20mm or greater core with 1mm of glass each side and a wafer thin smear of filler and paint.

I have done work on production cats where so called foam core was 10mm and 5mm of woven rovings and chopped strand mat. On top of that was 3mm of gel coat, none of which is strong, all is heavy, robbing the cat of performance and load carrying ability.

Interestingly, dominos cruise speed of 8 knots has a similar fuel burn to our boat at 8 knots
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