Reply
 
Thread Tools Search this Thread
 
Old 14 August 2011, 16:15   #21
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,112
Quote:
Originally Posted by quaoar View Post
Why bother if his comparison on fuel consumption is sky high compared to what I'm experiencing. It was he who asked for some numbers, which for me implies that he actually believed there to be some similiarities with the numbers he presented. *shrug*
Because if you had bothered you would see that Alan has indeed owned several diesel inboard powered craft used for seriously long trips. Whilst I am sure there are various reasons for that choice fuel efficiency is probably one of the factors. The factors affecting the choice don't seem to have changed since his latest project is also diesel powered.

Quote:
My point was that there is a usage for inboard diesel engines, because they are cheap compared to petrol outboards when it comes to paying for fuel.
Yes, although compared to total cost of ownership (including the original purchase price/depreciation) the difference may not be so compelling. The compelling reason to me is dockside availability of fuel - and therefore versatility in where you go.

I might be misinterpretting what Alan was questioning - but I think it was possibly this claim...
Quote:
No outboard in existance today, will match my Goldfish with diesel engine at fuel consumption at cruising speed.
You are claiming 1L/NM fuel economy - which is actually what almost everyone on here claims as their cruising consumption regardless of the engine type.
__________________
Poly is offline   Reply With Quote
Old 15 August 2011, 04:13   #22
Member
 
Country: UK - England
Town: Portsmouth
Boat name: Not sure
Make: ABC/Priddy
Length: 10m +
Engine: 2 x 500 FPT
Join Date: Jul 2001
Posts: 926
Quote:
Originally Posted by John Kennett View Post
But he's used diesel RIBs and not outboards for all his major jaunts.

Al, are you confusing the 50 gallons an hour that the Beast drinks with 50 litres an hour for a diesel RIB? Just asking
JK, I am old but not daft. I just have a problem with the figures that are being put about. I am guessing that the fuel burn per mile per hour is not based on a loaded boat. I accept that if the craft is kept light then it may use the figures posted but I would be interested to know the actual fuel burn with a full load so these boats can go 400 miles with out fueling + kit and crew. I think their figures may well alter. Glad to see you finaly got to use a Redbay 11. I have just had two days being beat up in Cushendall myself Alan P
__________________

__________________
Alan Priddy is offline   Reply With Quote
Old 15 August 2011, 13:07   #23
Member
 
Bigmuz7's Avatar
 
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,068
Quote:
Originally Posted by Alan Priddy View Post
Glad to see you finaly got to use a Redbay 11. I have just had two days being beat up in Cushendall myself Alan P
Was that because you told willk that even after a nice cream tea, some whisky and a bit of training in one ,.. you still werent buying one ?
__________________
Bigmuz7 is offline   Reply With Quote
Old 15 August 2011, 13:26   #24
Member
 
Country: UK - England
Town: Portsmouth
Boat name: Not sure
Make: ABC/Priddy
Length: 10m +
Engine: 2 x 500 FPT
Join Date: Jul 2001
Posts: 926
Never say never! I might buy one for a tender to the new boat Alan P
__________________
Alan Priddy is offline   Reply With Quote
Old 15 August 2011, 13:39   #25
Member
 
Country: UK - Scotland
Town: Stornoway
Make: Scorpion 8.1 mk2
Length: 8m +
Engine: Yam F250 4.2 Litre
Join Date: Aug 2006
Posts: 193
quaroar, what type of out-drive/propellers are fitted on your goldfish? The numbers are VERY impressive! Diesels for sure have a place, and are easy 1/3rd more fuel efficient, not no mention the price diff in the fuel. The drives seem to be the weak point tho.... The way petrol prices are going diesel certainly appeals more & more to me..
__________________
Robbie Diesel is offline   Reply With Quote
Old 15 August 2011, 13:44   #26
Member
 
Country: Sweden
Town: Stockholm
Make: KR7
Length: 7m +
Engine: Evinrude 150 H.O
Join Date: Aug 2005
Posts: 735
Back to the Protector.

may not be as effective to mount the engines as far apart????
__________________
joakimhansson is offline   Reply With Quote
Old 15 August 2011, 13:46   #27
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,924
RIBase
Quote:
Originally Posted by Bigmuz7 View Post
Was that because you told willk that even after a nice cream tea, some whisky and a bit of training in one ,.. you still werent buying one ?

Sign!





Nah, I'm not allowed to meet the REALLY IMPORTANT guests!
__________________
willk is online now   Reply With Quote
Old 22 August 2011, 09:35   #28
Member
 
Country: Norway
Town: Oslo
Length: 9m +
Join Date: Mar 2008
Posts: 2
Just thought I'd add that we did not have a single issue with our Goldfish 29 (w/DMAX) in RB08, and we averaged 1.1 liters of diesel per nm over the entire race. I reckon you understand that this was not at cruising speed

For comparison, I raced a Goldfish 36 with twin DMAXes here this summer over a 75 nm course (with quite rough conditions for most parts of the distance), and we averaged just below 2 liters per nm at a 65 knot average.
__________________
PhatFrank is offline   Reply With Quote
Old 29 August 2011, 18:17   #29
Member
 
Country: USA
Town: Tahoe City
Boat name: Protector 28
Make: Rayglass
Length: 8m +
Engine: Outboard
Join Date: Apr 2011
Posts: 9
In response to #26, we have mounted some together but the fuel efficiency remained quite similar. We feel the usefulness of the swim platform was better to have at the end of the day. It is rare to get that kind of access to the water with outboards.

Cheers,
__________________
skisailralph is offline   Reply With Quote
Old 29 August 2011, 19:33   #30
Member
 
Country: Sweden
Town: Stockholm
Make: KR7
Length: 7m +
Engine: Evinrude 150 H.O
Join Date: Aug 2005
Posts: 735
Quote:
Originally Posted by skisailralph View Post
In response to #26, we have mounted some together but the fuel efficiency remained quite similar. We feel the usefulness of the swim platform was better to have at the end of the day. It is rare to get that kind of access to the water with outboards.

Cheers,
Thx, any difference in topspeed?
__________________

__________________
joakimhansson 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 04:50.


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