1. stedman, Jun 2, 2012

   #1

   

   stedman New Member

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   Jun 2, 2012

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   3

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   new orleans

   Thinking of using 6CTA's 425HP to cruise for extrended periods at hull speed 8 to 10 Knots, estimating 1000 RPM. Any downside? Also, what is est full usage for 50,000 lb boat?
2. K1W1, Jun 2, 2012

   #2

   

   K1W1 Senior Member

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   Sep 30, 2005

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   Hi,
   
   Find the propellor curve for that engine and see where the fuel burn line is at 1000 rpm, multiply it by the number of engines and you will have a calculated answer. There will no doubt be some difference when the general condition of the vessel and it's appendages are allowed for.
3. Capt J, Jun 3, 2012

   #3

   

   Capt J Senior Member

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   Jul 11, 2005

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   Fort Lauderdale

   I don't know for certain, but based upon the HP and RPM, they should burn 6 gallons an hour at 1000rpms for both engines.

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