Reply
 
Thread Tools Search this Thread
 
Old 28 January 2010, 12:55   #1
Member
 
Country: UK - Scotland
Length: 6m +
Engine: outboard 150
Join Date: Jan 2010
Posts: 70
rib vs dory

hi, does anyone here have any experience with wilson flyer type dorys around the 23 ft mark and how they would compare with a rib of similar size( i like the idea of a wheelhouse!). im will be upgrading my exsiting boat this year for something around that size and was intending buying another rib but it was suggested i looked at these type craft which do look like working out much cheaper than a rib. usage will be light commercial diving tasks and general cruising. any advice would be appreciated.
i do however realise the dory may require more horsepower due to weight.

thanks,
Hector.
__________________
hector is offline   Reply With Quote
Old 28 January 2010, 13:14   #2
RIBnet Supporter
 
willk's Avatar
 
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,664
Welcome to Ribnet (the Open University of the Mental Health System)

I've no experience with dorys but a bit with small cathederal hulls. In no particultar order:

1. The ride will be slappy in choppy water
2. It will be a bitch to dive off (comparatively)
3. You'll get away with a smaller motor on the Dory
4. It will not be quite as stable at rest as most ribs

I rather fancy a wheelhouse too. It's the money, isn't it?
__________________
willk is offline   Reply With Quote
Old 28 January 2010, 13:54   #3
Member
 
Leapy's Avatar
 
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,731
Quote:
Originally Posted by willk View Post
Welcome to Ribnet (the Open University of the Mental Health System)

I've no experience with dorys but a bit with small cathederal hulls. In no particultar order:

1. The ride will be slappy in choppy water
2. It will be a bitch to dive off (comparatively)
3. You'll get away with a smaller motor on the Dory
4. It will not be quite as stable at rest as most ribs

I rather fancy a wheelhouse too. It's the money, isn't it?
My experience is...

1. The ride will be very slappy in choppy water
2. Don't know
3. OK
4. It will be nowhere near as stable at rest compared to a RIB

__________________
Leapy is offline   Reply With Quote
Old 28 January 2010, 16:28   #4
Member
 
Country: UK - England
Town: cookoo land
Boat name: tba
Make: ribcraft 595
Length: under 3m
Engine: Suzi 140
Join Date: Sep 2007
Posts: 316
Hector
I have owned a 13ft Dory, a 17ft Boston Whaler and now a 6m RIB.

Without question, the RIB is by far the most 'useable' boat in any kind of seaway.

However, a cathedral hull will produce more lift more quickly and therefore will require less hp than an equivalent sized RIB to plane.

A reasonable compromise might be a catamaran. Used for years and years by small commercial operators, they are becoming more popular in the leisure market.

A friend of mine runs a 6m cat with two 15hp 4 strokes! He says he'll happily chuff along at 15-18knots all day long, on a very stable platform with huge deck space, low freeboard, a good sized cuddy, and on very little fuel!

He also has the reassurance of an 'extra' engine that's not just dead weight and hardly ever used, like an aux!

Makes you think doesn't it!
(certainly got me thinking)
__________________
BassBoy is offline   Reply With Quote
Old 28 January 2010, 17:44   #5
Member
 
Sea Witch's Avatar
 
Country: Ireland
Town: clifden
Make: Fletcher Bravo Arrow
Length: 5m +
Engine: Yamaha 175
Join Date: Jan 2010
Posts: 43
sea witch

Hi new to Rib net

i have a 17ft dell quay dory with 75 hp mariner , she top 30 knots quite happily ,
it is a bang box (slappy) in the ruff , but more stable and a better diving ,fishin platform than a rib.
i go to Inishboffin , Inishturk north , Clare island off west coast of Ireland no bother in my dory.

sea witch
__________________
Sea Witch is offline   Reply With Quote
Old 28 January 2010, 18:07   #6
RIBnet Supporter
 
willk's Avatar
 
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,664
Quote:
Originally Posted by Sea Witch View Post
but more stable and a better diving ,fishin platform than a rib.
Fishing maybe, diving no.


And this has to be said to all you flat bottomed guys;

Ribnet. RIBnet. RIBNET!! Not Dorynet ....

shoo! geroutofit! g'wanaway! getonwidye! ;-)
__________________
willk is offline   Reply With Quote
Old 28 January 2010, 18:50   #7
Member
 
Country: UK - England
Town: cookoo land
Boat name: tba
Make: ribcraft 595
Length: under 3m
Engine: Suzi 140
Join Date: Sep 2007
Posts: 316
Nowt wrong with RIBS, BUT OPEN YOUR MIND!
__________________
BassBoy is offline   Reply With Quote
Old 28 January 2010, 20:05   #8
Member
 
m chappelow's Avatar
 
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
a couple of members of our boat club have some but they are into angling in a big way ,and we used one as club rescue /safety boat many years ago ,,good solid but heavy boat ,with the correct engine they are great ,but even so i would stick with a r.i.b.,,mate of mine bought an old second hand one that had an outdrive and volvo engine and he converted it to an outboard .he also cut the cabin length shorter for more fishing room ,,,, i have dived with commercial diving equipment from the safety boat as it was fitted with a fold up ladder on the stern when we were removing some large slabs of concreate , we had a small compresser on the deck and it was fine but it was in sheltered water .if you are going to be lifting heavyish sharp/ rusty objects into the boat ,regular i would go for the wilson ,i have seen one used for crab potting with a small lawn mower type petrol driven winch bolted to the floor for lifting pots .
__________________
m chappelow is offline   Reply With Quote
Old 28 January 2010, 20:33   #9
RIBnet Supporter
 
willk's Avatar
 
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,664
Quote:
Originally Posted by BassBoy View Post
Nowt wrong with RIBS, BUT OPEN YOUR MIND!
My mind is so open it has a Garfish in it and goes here occasionally to relax. We could be really open minded and have a RIB vs Sheltie thread, or would that just be silly?
__________________
willk is offline   Reply With Quote
Old 29 January 2010, 08:16   #10
Member
 
Country: UK - Scotland
Length: 6m +
Engine: outboard 150
Join Date: Jan 2010
Posts: 70
thanks for the input guys got a few months to make up my mind . still really liking the thought of a wheelhouse though.
__________________
hector is offline   Reply With Quote
Old 29 January 2010, 12:53   #11
Member
 
Country: UK - Channel Islands
Town: Guernsey
Boat name: Lazy C...
Make: Osprey XR20
Length: 6m +
Engine: 2.5V6 200
Join Date: Sep 2009
Posts: 72
I had the use of a friend's 19ft Boston Whaler with a 200hp Optimax all of last summer. The ride in a head sea is pretty awful, following seas it coped with much better. It was definitely a handful in anything other than flat calm though, but then it is overpowered by 50hp and I'm very throttle happy

Great boat for messing around in though, more useable deckspace than a similarly sized RIB and will plane very easily even with a very heavy load. Not as fast as a similarly sized RIB though, she topped out at 48ish knots. Not bad for a fishing boat though! haha
__________________
Paul E is offline   Reply With Quote
Old 29 January 2010, 12:57   #12
Member
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
Quote:
Originally Posted by Paul E View Post
It was definitely a handful in anything other than flat calm though,
I with you on that one, very tiring..
Jizm is offline   Reply With Quote
Old 29 January 2010, 15:39   #13
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,667
At the other end of the scale, an 11' dory / 25 Hp.

As has been said before, nightmare in anything above a small ripple, but goes like a rocket in the flat stuff whilst using naff all fuel (even with a 38YO engine), and has about an acre of deck space considering it;s not much longer than a Mirror dinghy.... Also good for beaching due to the flat bottom.

Bought the rib 'coz I reckoned it would be cheaper than a steady supply of gum shields!
__________________
9D280 is offline   Reply With Quote
Old 31 January 2010, 17:13   #14
Member
 
Country: UK - England
Town: Dartmouth
Boat name: Puffling
Make: Avon Rover 3.4m
Length: 5m +
Engine: Mercury 15hp
Join Date: Jan 2002
Posts: 404
Send a message via MSN to badbaws
RIB man now.. but...

I once was a dory man, had an 11ft Dell quay with a 25hp mariner, most reliable outfit I ever had. Used to go out in force 7s and follow the ferry to the IOW from Southampton, very painful on the back on the wooden thwarts, but great fun, and low fuel use. Similar sized Avon S3.45 not much more sea worthy.. 4m Searider much better deep v hull.

Equally had use of a 185hp Seadoo Jetski last summer, it drank fuel and was rubbish in rough stuff but excellent for wakeboarding.

Buy a RIB does everything better, but then I did have an 8.4m Searider with 400hp on tap and was a little spoilt.

Most fun to be had is a 4m searider with a 50hp 2 stroke! 35 knots and excellent fuel economy
__________________
Advanced Power Boat Instructor
badbaws is offline   Reply With Quote
Old 31 January 2010, 17:50   #15
Member
 
Country: UK - Scotland
Length: 6m +
Engine: outboard 150
Join Date: Jan 2010
Posts: 70
lots of folk on here really seem to rate the 4m seariders. was looking at one for sale today with a 50 mariner on the back looked ok but was 3 grand, its lying at ardfern marina if anyone wanted to view it. thanks for all the input btw.
__________________
hector is offline   Reply With Quote
Old 31 January 2010, 20:19   #16
Member
 
Andy B's Avatar
 
Country: UK - England
Town: southampton
Length: 4m +
Join Date: Jul 2009
Posts: 342
Quote:
Originally Posted by Jizm View Post
I with you on that one, very tiring..
oi you! that was a fun day out,
but you were quite happy to get rag worm all over my dory mate
Attached Thumbnails
Click image for larger version

Name:	DSCN1683.jpg
Views:	266
Size:	69.6 KB
ID:	48934  
__________________
Andy B is offline   Reply With Quote
Old 01 February 2010, 08:00   #17
Member
 
Country: UK - England
Town: Coventry
Boat name: Eco XR24
Make: Eco-Marine
Length: 7m +
Join Date: Sep 2008
Posts: 41
Time to plane and fuel burn

Quote:
Originally Posted by BassBoy View Post
Hector
I have owned a 13ft Dory, a 17ft Boston Whaler and now a 6m RIB.

Without question, the RIB is by far the most 'useable' boat in any kind of seaway.

However, a cathedral hull will produce more lift more quickly and therefore will require less hp than an equivalent sized RIB to plane.

A reasonable compromise might be a catamaran. Used for years and years by small commercial operators, they are becoming more popular in the leisure market.
Hulls which are flatter at the stern get on to the plane more quickly and take less hp for the same speed as hulls with more angled surfaces - for the same overall weight. The downside is that they don't perform as well and can't be driven as fast in the rough. Long thin hulls are more efficient, but for different reasons, which is why cats take less hp for the same speed. Cats roll less of course, so can give a hard ride. RIBs are a pretty good compromise for most things, but the deep V hulls can take a lot of hp for a good speed - particularly if the boat is quite heavy.

One trick to get a deep V hull onto plane quickly, give a (very) good performance and low fuel burn at lower speeds is a wide flat keel. The Eco XR24 has a "planing wedge" - basically a long triangular flat at the end of the keel, which works very well. The boat was originally designed for both diving and racing! Although not shown on the website www.eco-marine.co.uk a wheelhouse/ cuddy has been designed. There's a picture here: http://rib.net/forum/showthread.php?...ht=xr24&page=2
__________________
ecoXR24 is offline   Reply With Quote
Old 01 February 2010, 18:54   #18
Member
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
Quote:
Originally Posted by Andy B View Post
oi you! that was a fun day out,
but you were quite happy to get rag worm all over my dory mate
wondered how long it would take the dory lover to appear
Jizm is offline   Reply With Quote
Old 01 February 2010, 18:57   #19
Member
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
hector, have a look at these links...

http://rib.net/forum/showthread.php?t=30703

http://rib.net/forum/showthread.php?t=31814
Jizm is offline   Reply With Quote
Old 01 February 2010, 19:45   #20
Member
 
Andy B's Avatar
 
Country: UK - England
Town: southampton
Length: 4m +
Join Date: Jul 2009
Posts: 342
first linky vid not work
try these.



Quote:
Originally Posted by Jizm View Post
wondered how long it would take the dory lover to appear

although i do love my little dory and have had a lot of fun in it,
its no match for a rib in the chop.
last summer both my and jizm went across the solent to the IOW for the day,
on our return the weather had turned to about a force 4
which was no problem for his 5m rib but bloody hard work in my same sized dory!
__________________
Andy B 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




All times are GMT. The time now is 04:44.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.