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Old 08 January 2010, 11:36   #61
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Town: N Wales Chester
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ocean pro 6.3, 2.5 V6 175hp opti. 2 up in calm with 140l on board averages at about 24 knots 1:1.
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Old 08 January 2010, 11:59   #62
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Zubenelgenubi: 30nm:25L @30kn (90 2/S) = 0.83 lpm 33kn
9D280: 35nm:30L @20kn (25 2/S) = 0.86 lpm 22kn
9D280: 24nm:30L @mixed (55 2/S) = 1.25 lpm 20kn
Leapy: 46nm:26L @20kn (90 4/S) = 0.57 lpm 28kn
Cypman: ?nm:? @30kn (140 4/S) = <1 lpm 35kn
TSM: ?:? @20kn (60 E) = 0.75 lpm 25kn
GordyP: ?:? @40kn (2x 150 Es) = 1.3 lpm 38kn
250kts: ?/? @25kn (115 2/S) = 0.67 lpm 34kn
Matt h: ?/? @? (90 2/S) = 0.84 lpm 29kn
Erin: 270nm/370L @mixed (200 4/S) = 1.37 lpm 25kn
Pablo: ?/? @30kn (90 2/S) = 0.8 lpm 32kn
Noser: ?/? @23kn 23kn
Jargos: ?/? @39kn (250 E) = 1.0 lpm 39kn
Paul: ?/? @? (200 2/S) = 1.0 lpm ?
P4VWL: ?/? @24kn (175 2/S) = 1 lph 24kn
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Old 08 January 2010, 12:12   #63
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Quote:
Originally Posted by malthouse View Post
Zubenelgenubi: 30nm:25L @30kn (90 2/S) = 0.83 lpm 33kn
9D280: 35nm:30L @20kn (25 2/S) = 0.86 lpm 22kn
9D280: 24nm:30L @mixed (55 2/S) = 1.25 lpm 20kn
Leapy: 46nm:26L @20kn (90 4/S) = 0.57 lpm 28kn
Cypman: ?nm:? @30kn (140 4/S) = <1 lpm 35kn
TSM: ?:? @20kn (60 E) = 0.75 lpm 25kn
GordyP: ?:? @40kn (2x 150 Es) = 1.3 lpm 38kn
250kts: ?/? @25kn (115 2/S) = 0.67 lpm 34kn
Matt h: ?/? @? (90 2/S) = 0.84 lpm 29kn
Erin: 270nm/370L @mixed (200 4/S) = 1.37 lpm 25kn
Pablo: ?/? @30kn (90 2/S) = 0.8 lpm 32kn
Noser: ?/? @23kn 23kn
Jargos: ?/? @39kn (250 E) = 1.0 lpm 39kn
Paul: ?/? @? (200 2/S) = 1.0 lpm ?
P4VWL: ?/? @24kn (175 2/S) = 1 lph 24kn
Malthouse...some of those numbers look suspiciously economical

Previous comments relate..."life is full of folks making outlandish fuel consumption claims for boat/car"
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Old 08 January 2010, 12:53   #64
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RIBase
Thats why I have posted the photos
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Old 08 January 2010, 13:25   #65
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Ribcraft 6.8 with 225 ETec: best fuel economy 1.23 litres per mile at 30 kts with one on board and an empty fuel tank otherwise about 1.5 litres per mile regardless of speed. The other day I was doing 40kts and was using 62 litres per hour.
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Old 08 January 2010, 18:31   #66
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5.8m Humber Destroyer with 90 4S Suzi gets 1.3nm/lt at 25knots and drops to 0.9nm/lt at 31knots.
Normal cruising speed 24-25knots in consequence......
This is from quite a few long distances and fuel monitoring meters onboard.
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Old 09 January 2010, 04:17   #67
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Zubenelgenubi: 30nm:25L @30kn (90 2/S) = 0.83 lpm 33kn
9D280: 35nm:30L @20kn (25 2/S) = 0.86 lpm 22kn
9D280: 24nm:30L @mixed (55 2/S) = 1.25 lpm 20kn
Leapy: 46nm:26L @20kn (90 4/S) = 0.57 lpm 28kn
Cypman: ?nm:? @30kn (140 4/S) = <1 lpm 35kn
TSM: ?:? @20kn (60 E) = 0.75 lpm 25kn
GordyP: ?:? @40kn (2x 150 Es) = 1.3 lpm 38kn
250kts: ?/? @25kn (115 2/S) = 0.67 lpm 34kn
Matt h: ?/? @? (90 2/S) = 0.84 lpm 29kn
Erin: 270nm/370L @mixed (200 4/S) = 1.37 lpm 25kn
Pablo: ?/? @30kn (90 2/S) = 0.8 lpm 32kn
Noser: ?/? @23kn 23kn
Jargos: ?/? @39kn (250 E) = 1.0 lpm 39kn
Paul: ?/? @? (200 2/S) = 1.0 lpm ?
P4VWL: ?/? @24kn (175 2/S) = 1 lpm 24kn
BruceB: ?/? @31kn (90 4S) = 0.9 lpm 29kn
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Old 22 February 2010, 14:59   #68
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Country: UK - Channel Islands
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Boat name: Martini II
Make: Arctic 28/FC470
Length: 8m +
Engine: twin 225Opti/50hp 2t
MMSI: 235067688
Join Date: Jun 2005
Posts: 3,021
Lucky people - cruising at 37kts I'm getting 2.6 litres per nm!

I believe the previous owners were able to achieve my magical 1:1, but only with assistance from an RAF C130....and a parachute
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Old 22 February 2010, 15:07   #69
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Quote:
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...... cruising at 37kts I'm getting 2.6 litres per nm!
Greedy git.
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Old 22 February 2010, 15:48   #70
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Make: RIBCRAFT 5.85
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Yamaha 150/4ST, less than 1l/m @ about 35K
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