Reply
 
Thread Tools Search this Thread
 
Old 31 May 2013, 17:28   #1
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
round ireland crusing speed of 22kn

I was out yesterday off the west coast of ireland and I was thinking about the crusing speed requirement of the RI 2013 of 22kn. My rib will do close on 30 kn but
crusing at 22 kn can be very uncomfortable on the west coast. 17 -18 kn is a much more reaslistic speed and at times I had to reduce my speed to 13 or 14 kn.

Am I getting too old for this crack or is a crusing speed of 22 kn a realistic speed for a rib lof 5.0 m or less

tsm
__________________

__________________
two stroke mick is offline   Reply With Quote
Old 31 May 2013, 18:36   #2
RIBnet supporter
 
MustRib's Avatar
 
Country: UK - England
Town: Newcastle
Boat name: Merlin
Make: RB4 Gemini 550
Length: 4m +
Engine: Tohatsu 90C
Join Date: Sep 2006
Posts: 1,048
Thing is... as far as I can see, there are only four boats under 5m going, and one of them is mine. Quite a few at 6 metres plus, and they will handle confused seas a lot better.
Sometimes its better to speed up in the chop, but I expect the going will be tough at times, better at others, and am sure the 22knots is an average for a leg. Weather and sea conditions will dictate.
I can average over 30 knots with a slight swell. Much less when its gets lumpy.
Your not getting too old Mick, just a little more errr....comfortable!


Quote:
Originally Posted by two stroke mick View Post
I was out yesterday off the west coast of ireland and I was thinking about the crusing speed requirement of the RI 2013 of 22kn. My rib will do close on 30 kn but
crusing at 22 kn can be very uncomfortable on the west coast. 17 -18 kn is a much more reaslistic speed and at times I had to reduce my speed to 13 or 14 kn.

Am I getting too old for this crack or is a crusing speed of 22 kn a realistic speed for a rib lof 5.0 m or less

tsm
__________________
MustRib is offline   Reply With Quote
Old 31 May 2013, 19:11   #3
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
You know what? It will depend on the size & wavelength of the chop at a given moment.

Forth cruise last year we exited form under the Kinkardine bridge into a huge wind vs tide chop. SR4, me @ 5M and another 6& a bit M. As the river widened and the current dropped, the wave shape changed. There were times I could motor along quite happily at 25 knots, the others were either slamming big style or over one, through the next.

500 yds. later I was slamming big style, the SR4 was happy, another 500 yds. later.... you get the picture.

You'll have seen the pics from ERR2013. I managed an average of 20,.2 knots to Crinan, 18.1 on the way back, and I'll tell you for free it was hard work for chunks of the return trip, but as Mustrib says, there were times when opening the throttle made it a far smoother ride.

Just remember to stick with your buddy boat(s).
__________________
9D280 is offline   Reply With Quote
Old 31 May 2013, 19:12   #4
RIBnet supporter
 
tonymac's Avatar
 
Country: Ireland
Town: Belfast
Boat name: Cait
Make: Humber
Length: 5m +
Engine: 90hp Opti
Join Date: May 2007
Posts: 909
RIBase
Quote:
Originally Posted by MustRib View Post
Thing is... as far as I can see, there are only four boats under 5m going, and one of them is mine. Quite a few at 6 metres plus, and they will handle confused seas a lot better.
Sometimes its better to speed up in the chop, but I expect the going will be tough at times, better at others, and am sure the 22knots is an average for a leg. Weather and sea conditions will dictate.
I can average over 30 knots with a slight swell. Much less when its gets lumpy.
Your not getting too old Mick, just a little more errr....comfortable!
Have you been out there? I have.

I recken that the speed will decrease.

Dont want to dampen spirits but just being realistic.

__________________
-**-**-**-**-**-**-**-**-**-**-**-**
Any meaning read into my message is the product of your own mind...
tonymac is offline   Reply With Quote
Old 01 June 2013, 01:59   #5
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
I went around clare island on thursday and it was not a wild day. the wind was from the north, but at times I had to drop my speed to 13- 15 kn
__________________
two stroke mick is offline   Reply With Quote
Old 01 June 2013, 03:53   #6
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,925
RIBase
The RI is essentially a race although some may take part for the experience alone. Racing and Cruising are worlds apart. The winning boat will be skippered by someone with a different mindset to most. They will have a boat rigged for it, they will not stop, they will not back off, they will not consider the comfort of crew, they will take chances...

...or they won't win.
__________________
willk is online now   Reply With Quote
Old 01 June 2013, 04:03   #7
Member
 
Adamn's Avatar
 
Country: UK - England
Town: Helston
Boat name: Myrtle
Make: Zodiac pro 500
Length: 4m +
Engine: Outboard 60hp
Join Date: Sep 2012
Posts: 255
I have read so much about RIBS and what they can do but as I only owned a SIB at the time I could only imagine what to expect.
I bought my first RIB in the Autumn a 5m Zodiac Pro with a 60 Yam on the back. Not the deepest hull but OK.
I went up to Fowey from Falmouth last Sunday the sea was slight on the way with only the occasional lumpy swell around some of the headlands but this was smooth faced due to little wind. The rib rode well at 21kts and I was frilled.
However on the return journey the wind was a F4 gusting F5 from the SW with white caps everywhere! Luckily the wind and swell were together but there was still a 1m wind swell with larger waves every few moments. I tried to plane at 16kts but found it slammed or launched off a wave and with the wind under the bow it easily went skyward I had the engine trimmed in but had to drop down to 10kts for safety.
I am sure a deeper V with a forward console set up would do much better.
Did you have much weight forward?
__________________
Adamn is offline   Reply With Quote
Old 02 June 2013, 16:26   #8
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
phyical fitness/ training

I also believe that phyical condition will play an important part of this event. I have read much on the works that have been carried out on the boats in prep for the event, Is anyone carrying out any personal fitness training for the round ireland event?

tsm
__________________
two stroke mick is offline   Reply With Quote
Old 03 June 2013, 02:38   #9
RIBnet supporter
 
Trevor G's Avatar
 
Country: UK - England
Town: Crowthorne
Boat name: Black Adder+BabyBlue
Make: Shearwater + Avon
Length: 8m +
Engine: TDi Diesel + Merc 60
MMSI: 235026679
Join Date: Jun 2008
Posts: 837
We're one of the Sub 5m Ribs (Team Baby Blue), and for us the RI 2013 is definitely a cruising challenge and in no way a race - if the weather's kind and we get to the end then I'll have won my challenger - irrespective of whether we're the first or last one back!

I'm sure we'll just adapt the speed to match the conditions - I should think most of us smaller boats will be able to do about 30 kts in the dead flat, but be much happier in the low 20's "normally" - especially as for the smaller boats the fuel we'll need to carry will be a much greater proportion of the boat's weight than for the larger boats.

Trev
__________________
Trevor G is offline   Reply With Quote
Old 03 June 2013, 03:38   #10
Administrator
 
John Kennett's Avatar
 
Country: UK - England
Town: Brighton
Length: 3m +
Join Date: May 2000
Posts: 6,830
Quote:
Originally Posted by willk View Post
The RI is essentially a race although some may take part for the experience alone.
We are talking about the Montgomery Swan production I assume? Unless I've missed something it's very much a cruise and not a race.

Having said that, I reckon that the smaller boats will be doing well to average much more than 15kt given a bit of mixed weather. I'm not sure where the 22kt figure comes from, but you'll be needing some very settled weather to make that as a long distance average in a 5m boat.
__________________

__________________
John Kennett 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 18:21.


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