Reply
 
Thread Tools Search this Thread
 
Old 16 August 2009, 06:46   #41
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
[QUOTE=willk;310514] And back on topic:



My Redbay will plane at about 20kts on one motor at WOT (with the dead stick in the water). It IS overpropped for single engine use (19 pitch) and has to be coaxed out of the water and she isn't making her normal revs either. I wouldn't fancy trying to maintain plane in short lumpy water.



Surely that blows away one of the main planks of the twin argument?
__________________

__________________
Mollers is offline   Reply With Quote
Old 16 August 2009, 06:59   #42
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
For emergency services, i reckon two motors is a sensible way to go. Because of their operating conditions, a motor stoppage is not so likely to have a similar cause to a cruising or day boat. I can quite imagine being is shitty conditions trying to rescue someone from rocks or under a pier and a total engine stoppage would be unacceptable, whereas a single engine stop would at least leave some means of control.

I've had twins, triples and singles and for everyday use it's hard to beat a good single and good aux. Only on one occasion did I need the aux and it was a good number of years ago.

Something I've might mention about multi engine installations; it's often tricky to get both engines permanently is sync regards running speed. They drift in and out of sync for a number of reasons and the beat caused by them being slightly out of sync can be very wearying. And LOUD...

Now Mr Willk, wot do you consider to be, "... a nice tidy solution for mounting an auxie on a single diesel outdrive rig....".
__________________

__________________
JW.
jwalker is offline   Reply With Quote
Old 16 August 2009, 07:07   #43
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Quote:
Originally Posted by Mollers View Post
.
Surely that blows away one of the main planks of the twin argument?
As arguments go, it certainly does have it's fair share of planks. Hopefully my observation provides more insight to one strand of the debate.

Half of a pair of twins will never give a RIB it's optimum performance but I'd say that making 20kts in a homeward direction in most seas is a plus in comparison to:
1. Hanging over the stern, massaging an expired single.
2. Deploying a hernia, sry, auxie and hanging over the transom trying to navigate by proxy.
3. Calling for a tow.

To add to your excitement I can report that I have heard of a recent local incident where BOTH twins passed away, under way, same way. Poor guy had sludge in his tank and didn't have "proper" sight glass filters fitted. But then, anyone can make that mistake .

And I suspect that you and I may have somewhat different definitions of "short lumpy water"
__________________
willk is offline   Reply With Quote
Old 16 August 2009, 07:15   #44
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Quote:
Originally Posted by jwalker View Post
Now Mr Willk, wot do you consider to be, "... a nice tidy solution for mounting an auxie on a single diesel outdrive rig....".
I really don't know My (original) comment to Rupert was simple and sincere. The next rib will be bigger and will either have to have twins or a readily deployable, securely stowed 15 - 20hp auxie. So much of the fancy kit for hard boats wouldn't last a season on a rib used to it's full potential
__________________
willk is offline   Reply With Quote
Old 16 August 2009, 07:22   #45
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Quote:
Originally Posted by willk View Post
As arguments go, it certainly does have it's fair share of planks. Hopefully my observation provides more insight to one strand of the debate.

Half of a pair of twins will never give a RIB it's optimum performance but I'd say that making 20kts in a homeward direction in most seas is a plus in comparison to:
1. Hanging over the stern, massaging an expired single.
2. Deploying a hernia, sry, auxie and hanging over the transom trying to navigate by proxy.
3. Calling for a tow.

To add to your excitement I can report that I have heard of a recent local incident where BOTH twins passed away, under way, same way. Poor guy had sludge in his tank and didn't have "proper" sight glass filters fitted. But then, anyone can make that mistake .

And I suspect that you and I may have somewhat different definitions of "short lumpy water"
Yeah, yeah, yeah, but are we now of the thinking that single with a sensibly hp'd aux is the way to go?
__________________
Mollers is offline   Reply With Quote
Old 16 August 2009, 07:23   #46
Member
 
Country: UK - Channel Islands
Town: Guernsey
Make: Pending
Length: 8m +
Join Date: Aug 2005
Posts: 296
Hi Willk,

My wife implies that I imply all the time. However, I subscribe to your last comments. A good aux. well fitted, not that I have a completely clear idea as to what this means or how it should be done.
__________________
cuttlefish is offline   Reply With Quote
Old 16 August 2009, 07:24   #47
Member
 
Country: UK - Channel Islands
Town: Guernsey
Make: Pending
Length: 8m +
Join Date: Aug 2005
Posts: 296
Mollers.

You wrote: "are we now of the thinking that single with a sensibly hp'd aux is the way to go?"

Yes.
__________________
cuttlefish is offline   Reply With Quote
Old 16 August 2009, 07:29   #48
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Quote:
Originally Posted by Mollers View Post
Yeah, yeah, yeah, but are we now of the thinking that single with a sensibly hp'd aux is the way to go?
Well, actually "we" are thinking that a twin diesel installation is the way to go

But there's a recession on here for the next decade or so
__________________
willk is offline   Reply With Quote
Old 16 August 2009, 07:29   #49
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Quote:
Originally Posted by rupert View Post
My wife implies that I imply all the time.
Don't they all?
Quote:
However, I subscribe to your last comments. A good aux. well fitted, not that I have a completely clear idea as to what this means or how it should be done.
Ah, more swatting for you then, cos there's plenty written about it on Ribnet if you go asearching.
__________________
JW.
jwalker is offline   Reply With Quote
Old 16 August 2009, 07:43   #50
Member
 
Country: UK - Channel Islands
Town: Guernsey
Make: Pending
Length: 8m +
Join Date: Aug 2005
Posts: 296
Jwalker.

Ah, more swatting for you then, cos there's plenty written about it on Ribnet if you go asearching.
__________
Just as well I like swatting, at least, I do so long as the argument interests me. Time is still on my side. I have sold my previous boat, and have the cash for the new rib burning a hole in my pocket. So long as I don't spend it, I can swat for hours and hours and hours. When I have spent it, there is little point in swatting, unless I made the wrong decision. And that would be cold sweat swatting - not pleasant!
__________________

__________________
cuttlefish 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 02:31.


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