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Re: GL: Super efficiency boats

LZ
Lawrence Zeitlin
Thu, Feb 2, 2006 4:11 PM

<<I won't name the designer as this is a non-commercial list, but I
pulled the following off his site.

But, 7000+ nmiles @ 6.37 knots, on 100 gallons of diesel!!!  WOW... Talk
about braging rights...

LOD: 44 11 LWL: 40 7 Beam: 10 6 Draft: 3 4 Displ.: 10,941 lbs.
Displ. loaded 2 past LWL: 13,158 lbs. Power: 10 HP SABB, 20 HP Lister,
or other small slow turning diesel.

Projected speed/power requirements, calm and off-weather conditions (read
that again before you write me!)
V/L...... Knots....... HP............. Range with 100 gallons @ .06
gal/HP hour
1.......... 6.37......... 1.9....................... 7012 miles
1.1....... 7.01......... 2.9....................... 4909
1.2....... 7.64......... 4.6....................... 3466
1.25..... 7.96......... 6.2....................... 2667
1.3....... 8.28......... 8.4....................... 2026
1.35..... 8.60........ 11.4...................... 1559

Personally I think I would use the Changfa 11 hp diesel from India, its a
great engine.

Cheers

JJ>>

That's funny. I ran the boat specifications through my conservative marine design program and came up with an estimate of 6.8 hp to move the boat at 6.37 kts. (S/L ratio of 1). And that's at the light displacement figure. The boat's transportation efficiency (Knots x Displacement/fuel consumed) is similar to that of my 32 year old, low tech Willard.

The Tooth Fairy strikes again.

Larry Z

<<I won't name the designer as this is a non-commercial list, but I pulled the following off his site. But, 7000+ nmiles @ 6.37 knots, on 100 gallons of diesel!!! WOW... Talk about braging rights... LOD: 44 11 LWL: 40 7 Beam: 10 6 Draft: 3 4 Displ.: 10,941 lbs. Displ. loaded 2 past LWL: 13,158 lbs. Power: 10 HP SABB, 20 HP Lister, or other small slow turning diesel. Projected speed/power requirements, calm and off-weather conditions (read that again before you write me!) V/L...... Knots....... HP............. Range with 100 gallons @ .06 gal/HP hour 1.......... 6.37......... 1.9....................... 7012 miles 1.1....... 7.01......... 2.9....................... 4909 1.2....... 7.64......... 4.6....................... 3466 1.25..... 7.96......... 6.2....................... 2667 1.3....... 8.28......... 8.4....................... 2026 1.35..... 8.60........ 11.4...................... 1559 Personally I think I would use the Changfa 11 hp diesel from India, its a great engine. Cheers JJ>> That's funny. I ran the boat specifications through my conservative marine design program and came up with an estimate of 6.8 hp to move the boat at 6.37 kts. (S/L ratio of 1). And that's at the light displacement figure. The boat's transportation efficiency (Knots x Displacement/fuel consumed) is similar to that of my 32 year old, low tech Willard. The Tooth Fairy strikes again. Larry Z