Diesel Consumption

craig_c · 20 August 2006, 16:14

Hi. we took delivery of our Redbay Expedition in late may 06.

We have kept reciepts of every diesel fill up from new and ran the engine at roughly 2300-2700 revs cruising.

We currently are burning 4 gallons an hour with a yamaha 422

What are other boats getting?

Brian · 20 August 2006, 17:46

What does that work out to at litres per nmile?

Alan · 20 August 2006, 20:24

Quote:

Originally Posted by Brian

What does that work out to at litres per nmile?

Oh c'mom Brian...4 galls per hour, roughly equals 18l per hr, hmm, lets say 2300-2700 knots gives what, 22-25kts? so thats somewhere around 0.8-0.9l per mile? Impressive economy I'd say.

Brian · 20 August 2006, 20:57

Well Alan, your assumptions may be correct-but thats what they are, assumptions.
Hmm. Lets see-wish I could cruise at 2700rpm and get 25knots!

craig_c · 20 August 2006, 21:17

Quote:

Originally Posted by Brian

Well Alan, your assumptions may be correct-but thats what they are, assumptions.
Hmm. Lets see-wish I could cruise at 2700rpm and get 25knots!

We are!!!!

alt · 20 August 2006, 22:53

Hi there,
I have a Mercruiser 1.7 Turbo Diesel (120HP)
I cruise @ 25knts, 3800RPM (Yes high I know, but the manual states upto 4400RPM WOT is safe)
We burn 25liters on a 26mile trip

So lets just say 1l per mile

Having said that, the boat weighs 1.4tonne dry, I always keep extra fuel on board aswell as supplies and crew, we're talking about 1.7tonne

I'm well pleased, costs less to run than my old Yamaha 75hp!

M.Thornton · 21 August 2006, 09:53

hi craig

we have 2x yamaha 421s on our 11m redbay
we use approx 5galls per hr on each engine
at 2800-3000 rpm and cruise at average 27 kts

we have been in a marina for 3 months and have
noticed a loss of approx 3 kts due to weed build
up (yes we antifouled!)

mike t.

Pete7 · 21 August 2006, 09:58

Pacific 22, about 2 tonnes, with larger 22" prop.

1 lpm at 22 knots (kids driving)
1.5 lpm at 30 knots.

Pete

Andy Gee · 21 August 2006, 10:43

Quote:

Originally Posted by M.Thornton

hi craig

we have 2x yamaha 421s on our 11m redbay
we use approx 5galls per hr on each engine
at 2800-3000 rpm and cruise at average 27 kts

we have been in a marina for 3 months and have
noticed a loss of approx 3 kts due to weed build
up (yes we antifouled!)

mike t.

Hi Mike,
Time you got that auld diving suit looked out

and gave her arse a wee buff!!.
I am burning a little less than you about 4.5 when under 6 on board @ 28Knts (2850 rpm)and about 5.5 when full 14 on board @ 28knts(3000rpm).
Andy

Rick · 21 August 2006, 12:04

Hi Craig,

I have been running the Redbay 8.4 expedition canopy version since March with the ME422, and also recorded all the fuel used. I am using approx 20l an hour cruising between 2800-2900 which gives 27Kn with 4 people.

Alan · 21 August 2006, 12:17

Quote:

Originally Posted by Brian

Well Alan, your assumptions may be correct-but thats what they are, assumptions.
Hmm. Lets see-wish I could cruise at 2700rpm and get 25knots!

Brian, the only assumption I made was that 2700rpm gives around 22-25kts on a Redbay expedition....and that was not so much an assumption as an educated guess! 4 gallons = 18 lph is maths not assumption

What do you get at 2700rpm? Back in the Bravo 3 days she'd be pulling 25kts or so at that RPM? Is it less with the Bravo 1?

craig_c · 21 August 2006, 12:30

2700 about 25 kts

Just thought it would be interesting to see what other people got

TIM · 21 August 2006, 13:23

Quote:

Originally Posted by Rick

Hi Craig,

I have been running the Redbay 8.4 expedition canopy version since March with the ME422, and also recorded all the fuel used. I am using approx 20l an hour cruising between 2800-2900 which gives 27Kn with 4 people.

What are you Getting at WOT from that boat .... and whats the fuel consumption ??? I had alook at it while Gavin and I were crusing up there... How do you find the KAB seats ????

ribowner · 21 August 2006, 15:51

I posted elsewhere on this forum re the benefits of Deisel oppossed to outboards and I see from this thread that they appear popular in private use. Can I ask you all the pros and cons for deisel

Alan · 21 August 2006, 16:15

Quote:

Originally Posted by ribowner

I posted elsewhere on this forum re the benefits of Deisel oppossed to outboards and I see from this thread that they appear popular in private use. Can I ask you all the pros and cons for deisel

Assuming this question is not a wind up can I,

a) Direct you to the FAQ section: http://www.rib.net/forum/showthread.php?t=8996

and

b) Suggest judicious use of the 'Search' function where you will find much to answer your questions my young Padawan.

Wise in the ways of rib.net am I. Hmmmm.

Paul Beaurain · 21 August 2006, 16:58

Hello Craig

There are various replies all with different size and weight of boat. Probably the weight has the biggest bearing.

The boat you have (8.4 expedition) do you know the weight of the boat?
Have you towed it? do you know of anyone who has towed it?

Looking at one of these boats they seem imensly practicle for our cold/damp environment. Do you find the windows top rail set too low - to see out? It just looks on pictures that either the seats are set too high or the windows a fraction low?

Can I pm you for more info please.
many thanks
Paul Beaurain

ribowner · 21 August 2006, 17:48

My hands on experince of Boats is great ............Ribs just a little less internet absolutely useless!!!! now I have been pointed to how to search I guess I have enough reading for tonight. Thanking you greatly and by the way are you the Alan of the one who called in St Katherines with your Yellow Cabin Rib ? if so we escorted you up Thames !!

Quote:

Originally Posted by Alan

Assuming this question is not a wind up can I,

a) Direct you to the FAQ section: http://www.rib.net/forum/showthread.php?t=8996

and

b) Suggest judicious use of the 'Search' function where you will find much to answer your questions my young Padawan.

Wise in the ways of rib.net am I. Hmmmm.

Alan · 21 August 2006, 18:15

Quote:

Originally Posted by ribowner

My hands on experince of Boats is great ............Ribs just a little less internet absolutely useless!!!! now I have been pointed to how to search I guess I have enough reading for tonight. Thanking you greatly and by the way are you the Alan of the one who called in St Katherines with your Yellow Cabin Rib ? if so we escorted you up Thames !!

You're welcome for the assistance. No, I rather suspect you are referring to the one and only Alan Priddy and the late Spirit of Cardiff/Jolly Sailor, last seen somewhere in the North Atlantic. The boat that is. Alan Priddy, coincidentally has just been on the TV news here having sailed across the Atlantic in the Lively Lady. I am merely a former rib.net stalwart, fading slowly into the night...............

craig_c · 21 August 2006, 18:55

Quote:

Originally Posted by Paul Beaurain

Hello Craig

There are various replies all with different size and weight of boat. Probably the weight has the biggest bearing.

The boat you have (8.4 expedition) do you know the weight of the boat?
Have you towed it? do you know of anyone who has towed it?

Looking at one of these boats they seem imensly practicle for our cold/damp environment. Do you find the windows top rail set too low - to see out? It just looks on pictures that either the seats are set too high or the windows a fraction low?

Can I pm you for more info please.
many thanks
Paul Beaurain

Sure you can Pm me. hads lots already anyway!

ribowner · 21 August 2006, 20:17

Yes you are right it was this gentleman we met in London !! but all the same thank you for your help

Quote:

Originally Posted by Alan

You're welcome for the assistance. No, I rather suspect you are referring to the one and only Alan Priddy and the late Spirit of Cardiff/Jolly Sailor, last seen somewhere in the North Atlantic. The boat that is. Alan Priddy, coincidentally has just been on the TV news here having sailed across the Atlantic in the Lively Lady. I am merely a former rib.net stalwart, fading slowly into the night...............