Reply
 
Thread Tools Search this Thread
 
Old 19 June 2006, 10:12   #1
Member
 
Country: Sweden
Town: Stockholm
Make: KR7
Length: 7m +
Engine: Evinrude 150 H.O
Join Date: Aug 2005
Posts: 735
How fast can you go before "wobbling"?

In size between 23-29 foot. I heard that the swedish rib, ribunlimited 700 has big problem over 40-42 knot. Ok, the boat is very light but...who want?
__________________
joakimhansson is offline   Reply With Quote
Old 19 June 2006, 11:14   #2
Member
 
Country: USA
Town: boston
Boat name: Miss bad 61
Make: Crapko, AKA Mako
Length: 5m +
Engine: OMC Mod50
Join Date: Apr 2006
Posts: 398
Drive through it, see whats on the other side, thinkin "wobbling" means chinewalk , as your skill grows you will automaticly compansate for the chinewalk, some setup addjustment may help as well.
__________________
fast fred is offline   Reply With Quote
Old 19 June 2006, 11:19   #3
Member
 
Country: Sweden
Town: Gothenburg
Make: Rib Unlimited
Length: 7
Engine: outboard Yam 115
Join Date: Apr 2004
Posts: 14
Mine doesn't wobble!

I have a RIB Unlimited 700 with a Yamaha 115 and have almost never experienced "wobble" maybe a tendency with just myself onboard low fuel load and outboard trimmed out a long way.........
With a clean bottom I've seen 47 Knots on the GPS.

My old Avon Searider with a mercury 75 I had in Plymouth many years ago used to do real "tank slappers"
__________________
Nicksweden is offline   Reply With Quote
Old 19 June 2006, 11:21   #4
Now back to being Mollers!
 
Country: UK - England
Town: Arundel
Boat name: Mike Bravo 1
Make: Scorp
Length: 9m +
Engine: Yanmar 300
Join Date: Oct 2005
Posts: 652
In my view 'chinewalk' is a badly set-up boat. I wouldn't want to power through it, i'd not want the boat in the first place. I drove a Nouvorania 5.5 with a 90 Honda on it that 'walked' all over the place it was not nice.
__________________
Alice is offline   Reply With Quote
Old 19 June 2006, 11:40   #5
Member
 
Country: USA
Town: boston
Boat name: Miss bad 61
Make: Crapko, AKA Mako
Length: 5m +
Engine: OMC Mod50
Join Date: Apr 2006
Posts: 398
"In my view 'chinewalk' is a badly set-up boat."
not so, some setup can contribute to the walk, but most of it is Driver Skill.
seen it many times, the hull be slapin left and right like a door flapin in the wind, a skilled driver reach over from the passenger side with one hand and it disapears.
__________________
fast fred is offline   Reply With Quote
Old 19 June 2006, 11:41   #6
Member
 
Country: Sweden
Town: Stockholm
Make: KR7
Length: 7m +
Engine: Evinrude 150 H.O
Join Date: Aug 2005
Posts: 735
Nick, Is the unlimited good even in sharp corners?
__________________
joakimhansson is offline   Reply With Quote
Old 19 June 2006, 12:00   #7
Member
 
Country: Sweden
Town: Gothenburg
Make: Rib Unlimited
Length: 7
Engine: outboard Yam 115
Join Date: Apr 2004
Posts: 14
Excellent in fast corners, I had the outboard mounted very high up a couple of years ago, for higher top speed, which has the effect of loosing some grip in sharp turns. With the outboard mounted in the standard poistion as I have now there is no problem.
By the way, I have changed from the standard 3 bladed Yamaha S/S propeller
to a four bladed S/S prop this gives better grip, useful when it's a bit choppy.
__________________
Nicksweden is offline   Reply With Quote
Old 19 June 2006, 12:49   #8
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,562
Funnily enuff I used to get 42 knots GPS out of my Searider 4.7 and that chined badly at around 35 and it was down to my understanding of the bots handling,

but I was driving a Ribtec at 44 knots the other day and I did not want to take the chining any further but it did have an Aux on the transom.
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote
Old 19 June 2006, 13:18   #9
Member
 
Jono's Avatar
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,127
How fast can you go before "wobbling"? .......about 2kph after a Stella or four......
__________________
Jono is offline   Reply With Quote
Old 19 June 2006, 15:45   #10
Member
 
Country: Sweden
Town: Stockholm
Make: KR7
Length: 7m +
Engine: Evinrude 150 H.O
Join Date: Aug 2005
Posts: 735
jono Sorry for my lovely english!
__________________
joakimhansson is offline   Reply With Quote
Old 19 June 2006, 15:58   #11
Member
 
Pete7's Avatar
 
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,951
Quote:
Originally Posted by fast fred
not so, some setup can contribute to the walk, but most of it is Driver Skill. seen it many times,
Hmm, you sure? I was also out with Stu doing 44 knots and the rib was chine walking. I had a good look at what he was doing and couldn't see anything wrong concerning trim or balance of the boat. I put it down to the boat set up (short fat boat with a big opti on the back).

Pete
__________________
.
Ribnet is best viewed on a computer of some sort
Pete7 is offline   Reply With Quote
Old 19 June 2006, 16:04   #12
Member
 
Country: UK - England
Town: Farnborough
Boat name: Narcissus
Make: Cobra
Length: 7m +
Engine: Optimax 225
Join Date: Jul 2003
Posts: 2,281
A poorly setup boat will be inclined to do it. A well setup boat "may" be inclined to do it, and then driver skill is needed to control it. Hanging on for dear life, or nailing the throttle, is not the right answer.
__________________
Matt is offline   Reply With Quote
Old 19 June 2006, 16:36   #13
Member
 
Country: UK - England
Boat name: Wild Rider
Make: Avon SR 4.7m
Length: 4m +
Engine: Honda 45HP
MMSI: 235031232
Join Date: Mar 2004
Posts: 13
Send a message via MSN to simonfuller
Quote:
Originally Posted by Rogue Wave
Funnily enuff I used to get 42 knots GPS out of my Searider 4.7 and that chined badly at around 35 and it was down to my understanding of the bots handling,
Rogue Wave, out of shear curiousity, what make/hp/model of outboard did you acheive those sorts of speeds on your old Searider 4.7 with? I currently have a Honda 45hp with which I can only achieve about 22-23 knots at the moment.

Thanks Simon
__________________
Simon
simonfuller is offline   Reply With Quote
Old 19 June 2006, 17:30   #14
Member
 
Country: UK - England
Town: Essex/Vendee
Boat name: shockwave,Voluntry 2
Make: Pac 22/ searider5.4
Length: 6m +
Engine: 180hp turbo,yam 90
Join Date: Nov 2004
Posts: 1,022
Quote:
Originally Posted by MadMat
A poorly setup boat will be inclined to do it. A well setup boat "may" be inclined to do it, and then driver skill is needed to control it. Hanging on for dear life, or nailing the throttle, is not the right answer.
I agree with this and can speak about set up as many boats bought have finally realised every set up effects a boat differently.Will post more but must give in to the wife saying teas ready why do you start ribnet when i,m dishing up. sound familiar anyone
__________________
PeterR is offline   Reply With Quote
Old 19 June 2006, 18:41   #15
Member
 
Country: UK - England
Town: poole
Make: ring
Length: 5m +
Engine: 150xr2
Join Date: Mar 2006
Posts: 180
I had this chine walk dilemer when my rib was first set up, i found 10mph very annoying and if I wanted to go faster i realised a lot of set up options were going to take place, but then I knew are so many variables from weight of engine to offset, prop type inc pith & diamiter, weight distributon within the boat both fore and aft, as well as port and starbord. Even two simular boats can have varing characteristics, and as regards looking for that last mph is it really that nesscesary in a pleasure Rib mostly used at part throttle, as opposed to a rib set up for racing and looking for that last 0.1 of mph.
__________________
ribit is offline   Reply With Quote
Old 19 June 2006, 19:22   #16
Member
 
Country: UK - England
Town: poole
Make: ring
Length: 5m +
Engine: 150xr2
Join Date: Mar 2006
Posts: 180
MMMMM computer crashed, when my last post was just a rough draft, with phonetic spelling, and it posted it!!!!! and now will not let me edit it, Bugger!!!!always do a very rough draft and then decide on how I will post something
__________________
ribit 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 11:08.


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