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Old 06-22-2021, 09:13 AM   #5
ranger58sb's Avatar
City: Annapolis
Vessel Name: Ranger
Vessel Model: 58' Sedan Bridge
Join Date: Aug 2013
Posts: 6,692
Originally Posted by Trawler Expert View Post
Fellow said to me, OK this 48 ft twin 200hp each diesel trawler cruises at 12.5 knots and burns 15 GPH isn't much different from a 48 ft Convertible with Twin 800hp Diesels that cruise 25 knots and burn 35-40 GPH.

12.5 kts is probably approaching the worst speed possible for fuel economy.

Between 7-9 kts should be better.

IOW, his comparison is flawed.

We could reach almost 2 NMPG (less than 4 GPH total, IIRC) with twin 450s on our previous 42' Convertible... at around 7 kts, depending on wind/current/tide/etc.

Chesapeake Bay, USA
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