Reply
 
Thread Tools Search this Thread
 
Old 29 April 2012, 17:30   #1
Member
 
Country: UK - England
Town: Knutsford
Boat name: Red Jelly
Make: Narwhall 520
Length: 5m +
Engine: 1998 Mariner 75hp
Join Date: Dec 2008
Posts: 71
Ribcraft 585 + Suzuki 140 fuel consumption

Hello,

Does anyone had ANY indication at all for the fuel consumption of the Ribcraft 585 + Suzuki 140hp? It will be max 7 men up but no gear on board and not much more than idiling.

Now the above set up may sound strange but Im doing support boat for the Celtic Challenge next weekend and after a snag with my RIB ive had to borrow the Father-in-laws rib. The trip port to port is about 90 miles (round it up to 100) for the rowing boat but i will be going back and forward most the time so could well cover double that but averaging maybe 5 knts so im not sure what to aim for.

MATH Time....
The only figure ive found so far is a 585 with 90hp that will get 80 miles from 20 gallons so that works out at 1.125l per mile. So 1.125l x 100 - 112.5 litres. Plus 1 3rd for safety means 149.6 litres. So 150litres to cover a slow, repetitive 100 miles? Sound correct.

Sounds alot of fuel to me but if you think il cover maybe 200 miles (doubling up) at 5knts 150litres doesnt sound like much. We have a support yacht 40ft away at all times to carry the fuel for us and most of the time we will be only 2 up and running out of fuel simply IS NOT an option so what would you go with based on the above ?
__________________

__________________
Willbrooksy is offline   Reply With Quote
Old 29 April 2012, 17:36   #2
RIBnet supporter
 
jambo's Avatar
 
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 5,789
RIBase
Quote:
Originally Posted by Willbrooksy View Post
Hello,

Does anyone had ANY indication at all for the fuel consumption of the Ribcraft 585 + Suzuki 140hp? It will be max 7 men up but no gear on board and not much more than idiling.

Now the above set up may sound strange but Im doing support boat for the Celtic Challenge next weekend and after a snag with my RIB ive had to borrow the Father-in-laws rib. The trip port to port is about 90 miles (round it up to 100) for the rowing boat but i will be going back and forward most the time so could well cover double that but averaging maybe 5 knts so im not sure what to aim for.

MATH Time....
The only figure ive found so far is a 585 with 90hp that will get 80 miles from 20 gallons so that works out at 1.125l per mile. So 1.125l x 100 - 112.5 litres. Plus 1 3rd for safety means 149.6 litres. So 150litres to cover a slow, repetitive 100 miles? Sound correct.

Sounds alot of fuel to me but if you think il cover maybe 200 miles (doubling up) at 5knts 150litres doesnt sound like much. We have a support yacht 40ft away at all times to carry the fuel for us and most of the time we will be only 2 up and running out of fuel simply IS NOT an option so what would you go with based on the above ?
H I wish you well with your trip.
The only guy on here I know with the exzact same rib is IBWET.
I am sure will not mind if you PM him.
Hope that helps
Cheers
__________________
jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
jambo is offline   Reply With Quote
Old 29 April 2012, 17:44   #3
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,596
RIBase
I had a RC 585 with a 175 FICHT & used to use 20l/hr at 27kn which is well under 1l/nm. Ticking over it used b**ger all.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 29 April 2012, 17:46   #4
Member
 
ppenman's Avatar
 
Country: UK - England
Town: Wickford, Essex
Boat name: Wanderer
Make: Ribeye, Zodiac FR
Length: 7m +
Engine: Yamaha F300, 25 2S
MMSI: 235095667
Join Date: Aug 2010
Posts: 219
I've recently sold my 585 which had a Suzuki df 140. For planning I used a figure of 0.95 litres a nautical mile although the true consumption was around 0.90 per mile. Cruising speed was around 25-30 kn.

The distance was measured using gps tracking and fuel use was by brimming the tank at petrol pumps.

Hope this helps.
__________________
ppenman is offline   Reply With Quote
Old 29 April 2012, 17:56   #5
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,894
RIBase
Hi Will

I'd reckon on about a litre per mile.

My 150 opti manages a bit better than this at 25 knots or so.

Looking at the smartcraft gauges at displacement speeds it also seems to work out at about a litre per mile.

I would expect a 4 stroke to be pretty frugal when at 5 knots or less. So you might use less than your calcs suggest.



Worst speed is between 8 and about 20 knots where consumption is more than a litre per mile.
__________________
Searider is offline   Reply With Quote
Old 29 April 2012, 17:57   #6
Member
 
Country: UK - England
Town: Knutsford
Boat name: Red Jelly
Make: Narwhall 520
Length: 5m +
Engine: 1998 Mariner 75hp
Join Date: Dec 2008
Posts: 71
So im on the right side of things then which is good - potentially way on the right side depending on the most economical speed balanceing act so going of 0.95 + 1/3 safety il need 126 litres
__________________
Willbrooksy is offline   Reply With Quote
Old 29 April 2012, 18:00   #7
Member
 
Country: UK - England
Town: Knutsford
Boat name: Red Jelly
Make: Narwhall 520
Length: 5m +
Engine: 1998 Mariner 75hp
Join Date: Dec 2008
Posts: 71
1:1 seems a simple way

Going to speak to the RIB crew the team used last time and see how much they took with them.

For anyone who knows about the challenge im with the Aberdovey mens team - they were 4 seconds of the world record last time
__________________
Willbrooksy is offline   Reply With Quote
Old 29 April 2012, 18:00   #8
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,894
RIBase
If you can resist the temptation to be tazzing between the yacht and the rowing boat all the time you should be fine.

Having said that - if you do have the facility to carry 200 litres you might be grateful of it.

What about towing the rib behind the yacht?
__________________
Searider is offline   Reply With Quote
Old 29 April 2012, 18:41   #9
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Quote:
Originally Posted by ppenman View Post
I've recently sold my 585 which had a Suzuki df 140. For planning I used a figure of 0.95 litres a nautical mile although the true consumption was around 0.90 per mile. Cruising speed was around 25-30 kn.

The distance was measured using gps tracking and fuel use was by brimming the tank at petrol pumps.

Hope this helps.

That's about the same as I remember Biggles' RC585/DF140 using when we did a Round The Island on it.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 30 April 2012, 09:31   #10
Member
 
Country: UK - N Ireland
Town: Belfast
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140 4/stroke
Join Date: Aug 2003
Posts: 181
RIBase
0.9l per mile is spot on at 25kts
__________________

__________________
parm is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:09.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.