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13 September 2007, 06:11
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#1
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Member
Country: UK - England
Town: Lymington
Boat name: Farfetched
Make: Solent Ribs
Length: 6m +
Engine: 150hp Suzuki
MMSI: 235021048
Join Date: Apr 2004
Posts: 963
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New / Spare Prop
Running 21" Laser on my 150 opti and 6.5M Solent. Want to up my WOT speed - yes, I'm a sad bugger. Don't pull anything. This is about the need for speed. No real need to be fast out of the hole - wife tells me off when I do anyway. But when near WOT she is hanging on and the Opti 'deafens' me!!!!
Currently about 45/46K on gentle chop with 1/4 tank and 2 adults. Ideas please?
Thanks as ever
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13 September 2007, 08:41
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#2
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Member
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,951
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Bruce, you need to know what the max revs are at your current top speed, but I recon your pretty close to the biggest prop you can turn now.
If you want to go faster you need a bigger engine or loose some weight, out of the boat that is.
Pete
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13 September 2007, 09:21
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#3
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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Quote:
Originally Posted by Pete7
If you want to go faster you need a bigger engine or loose some weight, out of the boat that is.
Pete
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Loose the Wife and run on fumes, take that horse shoe life ring off the back (should decrease your drag a little) and off you go
Be sure to let us all know how you get on.
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Andy
Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
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14 September 2007, 14:28
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#4
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Member
Country: UK - England
Town: Lymington
Boat name: Farfetched
Make: Solent Ribs
Length: 6m +
Engine: 150hp Suzuki
MMSI: 235021048
Join Date: Apr 2004
Posts: 963
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I need to lose weight personally anyway
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14 September 2007, 17:56
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#5
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Quote:
Originally Posted by brucehawsker
..... But when near WOT she is hanging on and the Opti 'deafens' me!!!!
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Surely, you don't expect more speed and less noise?
If you want less 'deafening noise', better get rid of the Opti.
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14 September 2007, 18:05
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#6
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,875
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I find the 'prop advice' on this site so hit and miss that it's close to no use at all. I have the same engine and the same prop as yourself on a 6.5m Vipermax. I get 40knots and that's the lot, I'm surprised that you're getting 6knts more. No way could I run a 23P prop, it would kill the boat. I'd struggle to get on the plane.
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14 September 2007, 18:55
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#7
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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Quote:
Originally Posted by Mollers
I find the 'prop advice' on this site so hit and miss that it's close to no use at all. I have the same engine and the same prop as yourself on a 6.5m Vipermax. I get 40knots and that's the lot, I'm surprised that you're getting 6knts more. No way could I run a 23P prop, it would kill the boat. I'd struggle to get on the plane.
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They're completely different shapes of Hull, the 6.5m Solent in nearer 7m in length BTW, but has a much narrower beam than the Vipermax. That'll mean the Solent will go faster, but have a much harder ride. It's probably a lighter RIB as well.
I'm hoping my 6.2 Vipermax will top out at 45 knotts with a 150 on. The beam is narrower than the 6.5's so hope it'll be a faster hull.
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Andy
Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
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14 September 2007, 21:45
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#8
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,875
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[QUOTE=Hightower;218754] They're completely different shapes of Hull, the 6.5m Solent in nearer 7m in length BTW, but has a much narrower beam than the Vipermax. That'll mean the Solent will go faster, but have a much harder ride. It's probably a lighter RIB as well.
If it's nearly 7m and doing 45+knts with a 150 Opti on the back it must be made of tissue paper.
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14 September 2007, 22:05
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#9
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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[QUOTE=Mollers;218794]
Quote:
Originally Posted by Hightower
They're completely different shapes of Hull, the 6.5m Solent in nearer 7m in length BTW, but has a much narrower beam than the Vipermax. That'll mean the Solent will go faster, but have a much harder ride. It's probably a lighter RIB as well.
If it's nearly 7m and doing 45+knts with a 150 Opti on the back it must be made of tissue paper.
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I can't quote on speeds for the Solent, but the hull design is based on a Tohatsu hull I believe. This could be opening a can of worms here
It is quite an efficent design and have been in one at full chat with an HO 200 Etec on the back. Yes, it did hurt
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Andy
Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
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15 September 2007, 13:47
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#10
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Member
Country: UK - England
Town: Lymington
Boat name: Farfetched
Make: Solent Ribs
Length: 6m +
Engine: 150hp Suzuki
MMSI: 235021048
Join Date: Apr 2004
Posts: 963
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OK. Can confirm that with two blokes (13.5st and 12st) and one quarter of a tank 40 litres with our six pods, anchor, safety kit etc we averaged (I have numbers in front of me) 45.78k according to the GPS on a two way run WOT from approx the Lymington Sailing Platform to Cowes Roads in a light chop (F2/3 - sea condition mild). No it doesn't hurt if you keep a hand on the trim and trim down for the rougher bits. This is with a clean bottom - polished myself (no, the boat, you idjut!) and the engine nice and warm. Temperature about 68c, sunny.
Kev from Solent got it up to 49.1 a while back with the two of us on board with a about a 3 knot current going with us according to the electronic chart - so that is 46k.
I like the noise!!
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15 September 2007, 13:58
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#11
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
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[QUOTE=Hightower;218800]
Quote:
Originally Posted by Mollers
but the hull design is based on a Tohatsu hull I believe.
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A pal of mine was recently at the Tohatsu HQ (potting shed) where he remarked to one of the personel that the hull of their rib looked eficient, he was told that it should be, as it's a Phantom.
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It is better to remain silent and be thought a fool, than to speak and remove all doubt!
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15 September 2007, 16:42
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#12
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Member
Country: UK - England
Town: scotland
Boat name: Leviathan
Make: Phantom
Length: 8m +
Engine: GM Diesels
Join Date: Jan 2003
Posts: 1,437
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[QUOTE=Dirk Diggler;218857]
Quote:
Originally Posted by Hightower
A pal of mine was recently at the Tohatsu HQ (potting shed) where he remarked to one of the personel that the hull of their rib looked eficient, he was told that it should be, as it's a Phantom.
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yes, a lemming theft, then given to solent (with a minor alteration to the spray rail tips as a 'smoke screen')
What a tangled web.................
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15 September 2007, 22:28
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#13
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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[QUOTE=Jonny Fuller;218873]
Quote:
Originally Posted by Dirk Diggler
yes, a lemming theft, then given to solent (with a minor alteration to the spray rail tips as a 'smoke screen')
What a tangled web.................
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Look what I've started now
However the quote in your post wasn't posted by me
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Andy
Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
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16 September 2007, 17:10
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#14
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Quote:
Originally Posted by brucehawsker
OK. Can confirm that with two blokes (13.5st and 12st) and one quarter of a tank 40 litres with our six pods, anchor, safety kit etc we averaged (I have numbers in front of me) 45.78k according to the GPS on a two way run WOT from approx the Lymington Sailing Platform to Cowes Roads in a light chop (F2/3 - sea condition mild). No it doesn't hurt if you keep a hand on the trim and trim down for the rougher bits. This is with a clean bottom - polished myself (no, the boat, you idjut!) and the engine nice and warm. Temperature about 68c, sunny.
Kev from Solent got it up to 49.1 a while back with the two of us on board with a about a 3 knot current going with us according to the electronic chart - so that is 46k.
I like the noise!!
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What rpm are you pulling at 46kt SOW?
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17 September 2007, 09:14
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#15
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Member
Country: UK - England
Town: Lymington
Boat name: Farfetched
Make: Solent Ribs
Length: 6m +
Engine: 150hp Suzuki
MMSI: 235021048
Join Date: Apr 2004
Posts: 963
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Actually I don't know. I am an old blind bastard and find the smart craft guages a bugger to read. I will check. I have the GPS speed fed to a secondary small screen on the console in front of the navigators seat, above the big plotter.
I will check and report back
SOW?
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17 September 2007, 09:16
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#16
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Member
Country: UK - England
Town: Lymington
Boat name: Farfetched
Make: Solent Ribs
Length: 6m +
Engine: 150hp Suzuki
MMSI: 235021048
Join Date: Apr 2004
Posts: 963
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and... just because of its ancestry which I knew nothing of at the time of order / purchase... should I go to the police and surrender the boat since I suspect it has stolen IP
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17 September 2007, 13:08
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#17
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Quote:
Originally Posted by brucehawsker
SOW?
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Speed Over Water
Quote:
Originally Posted by brucehawsker
and... just because of its ancestry which I knew nothing of at the time of order / purchase... should I go to the police and surrender the boat since I suspect it has stolen IP
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Yes, you really should, if you have anything of a conscience.
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17 September 2007, 19:06
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#18
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Member
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,951
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Quote:
Originally Posted by brucehawsker
and... just because of its ancestry which I knew nothing of at the time of order / purchase... should I go to the police and surrender the boat since I suspect it has stolen IP
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No just go to the Church...... and stand a round for the Solent Ribnet members, this should resolve you of any blame. Good hull though
Pete
__________________
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Ribnet is best viewed on a computer of some sort
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18 September 2007, 06:24
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#19
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Member
Country: UK - England
Town: Swanmore nr Fareham
Boat name: Greyhound
Make: Ribtec
Length: 7m +
Engine: 225 Opti
Join Date: Oct 2004
Posts: 155
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Quote:
Originally Posted by brucehawsker
Actually I don't know. I am an old blind bastard and find the smart craft guages a bugger to read. I will check. I have the GPS speed fed to a secondary small screen on the console in front of the navigators seat, above the big plotter.
I will check and report back
SOW?
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I too am an old blind bastard and find the smart craft guages a pain. Am considering a chart plotter with smart craft ability (Navman) and I'd be interested in the setup you have. I see that Mercury do a SC5000 system £1000 I find the standard guages are just readable on the pontoon let alone on the water (there position isn't ideal to be fair)
Any picture or info would be really useful.
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