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Forum: Sport Yachts

01-08-2024, 12:33 AM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

So you used 40 gallons and traveled 26 miles?...

So you used 40 gallons and traveled 26 miles? That would be 1.54 gallons per mile.

Forum: Sport Yachts

01-08-2024, 12:29 AM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

That calculation was for both engines.

That calculation was for both engines.

Forum: Sport Yachts

01-07-2024, 12:40 PM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

Nope, 1 knot = 1.15 mph so 20 knots = 23 mph....

Nope, 1 knot = 1.15 mph so 20 knots = 23 mph. 33.8/23 = 1.47 gallons per mile

Forum: Sport Yachts

01-06-2024, 09:51 PM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

With a similar boat to CapPap whose rpm of 3500...

With a similar boat to CapPap whose rpm of 3500 burns 33.8 gph you need to convert your 20 knots tp mph and multiple the inverse by 33.8 gph to get gallons per mile.

Forum: Sport Yachts

01-06-2024, 06:45 PM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

Not sure anyone will know but we would need to...

Not sure anyone will know but we would need to know more such at what speed you are traveling and or rpm.

Forum: Sport Yachts

01-03-2024, 04:27 PM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

As I said I assumed small blocks since you had...

As I said I assumed small blocks since you had not said what you have. A 7.4 will burn around 15 gallons each so your 33.8 is in line.

Forum: Sport Yachts

12-30-2023, 11:25 PM

Replies: 21

Cruising Speeds

Views: 1,067

Posted By mmwjr

Not sure what boat nor engines you have but...

Not sure what boat nor engines you have but assuming twin small blocks would burn around 12 gallons per hour each at 3500 rpm times two to travel 52 miles for a total of 48 gallons. The same engines...

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