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03-07-2006, 10:32 PM
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#1
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Registered User
Country: Wales
Location: Southampton
Occupation: boat driver/Instructor
Interests: boats , laughing and music
Boat name: Dyna Mo Humm
Boat make: Avon Searider 8.4mmmm
Engines: Cat 4216 450hp
Cruising area: Solent
Join Date: Mar 2004
Location: Southampton
Posts: 983
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how fast
err how fast could one expect a 6.5 metre hardboat to go with a 150 Optimax on it. Also what sea coditions would that be good for
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when I grow up I wanna be Tony Davis
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03-07-2006, 10:36 PM
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#2
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Registered User
Join Date: Mar 2004
Posts: 5,724
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Re: how fast
Quote:
Originally posted by Rogue Wave
err how fast could one expect a 6.5 metre hardboat to go with a 150 Optimax on it. Also what sea coditions would that be good for
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depends on what 6.5m hardboat! watcha got nobba?
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03-07-2006, 10:39 PM
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#3
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Registered User
Country: Wales
Location: Southampton
Occupation: boat driver/Instructor
Interests: boats , laughing and music
Boat name: Dyna Mo Humm
Boat make: Avon Searider 8.4mmmm
Engines: Cat 4216 450hp
Cruising area: Solent
Join Date: Mar 2004
Location: Southampton
Posts: 983
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I haven't got one and yep I realised that different boats have different speeds. I am just trying to compare a hardboat to my old Scorp as I seeem to be missing the speed
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when I grow up I wanna be Tony Davis
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03-07-2006, 10:39 PM
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#4
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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Re: how fast
Quote:
Originally posted by Rogue Wave
err how fast could one expect a 6.5 metre hardboat to go with a 150 Optimax on it. Also what sea coditions would that be good for
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That all rather depends on what hardboat you choose, and how well it's set up.
a light-ish P21 (6.5m) would probably run 60 ish.(mph)
would run in a fair sea, but very differenty to ya average rib, as they're generaly set-up/ballaced to 'plod' easily in a slop, whereas the phantom would need driving really hard to get it to run nice, but ulimately more quickly.
it's all about 'trade-offs'.
Be quite a hard ride too, compared to a scorp
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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04-07-2006, 12:03 AM
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#5
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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P 21 with 150 Opti, on ski racing circuit running 67mph with a skier
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04-07-2006, 12:06 AM
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#6
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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That seems quick, when Ian Stirling only runs 67/68 with a 200 XR2, and no skier!
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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04-07-2006, 12:10 AM
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#7
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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Twas gps'd at the weekend
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04-07-2006, 12:17 AM
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#8
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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Also know of a P20 67 on gps with 150 Opti
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04-07-2006, 12:21 AM
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#9
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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Ian runs a laser 2 though.when racing ya would need a prop to use in all conditions a fast(er), flighty prop isnt gona win a race if you cant keep the boat/ engine in the water.
I agree with Jon thats very quick wacky , the xr2 has a higher rpm limiter then the 150 aswell .
Wacky are you running any setback? and what prop?
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04-07-2006, 12:28 AM
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#10
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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Not my boat, no setback, engine bolted to transom.
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04-07-2006, 09:23 AM
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#11
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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Are you sure it's only 150hp?
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Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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04-07-2006, 01:14 PM
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#12
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Registered User
Country: GB
Location: south coast
Occupation: electrician
Boat make: CYCLONE INVADER 21
Engines: EVINRUDE 250 HO G2
Join Date: Apr 2005
Location: south coast
Posts: 97
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I would agree with wacky and have actually sat in the p20 with 150 hp opti with gps that said 67 mph so i have no problems i also know the 21 with the 150 hp opti and i belive its all down to prop as he changed it and gained 4mph!!!! not so long ago
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04-07-2006, 01:23 PM
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#13
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Registered User
Country: UK
Location: Surrey
Boat make: Ring 25 Sportscruiser
Engines: Mercruiser 496 HO
Cruising area: Solent
Join Date: Apr 2004
Location: Surrey
Posts: 151
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I run a Tempest Plus prop on a Ring 21 / Optimax 200HP. This prop gives much better handling than a Laser 2, in terms of reduced tendency to chine walk, whilst giving reasonable amounts of bow and stern lift.
Does anyone else have any experience of the Tempest props?
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04-07-2006, 01:33 PM
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#14
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Registered User
Country: uk
Location: poole
Occupation: retail
Interests: sport and being lazy
Boat make: ring rib
Engines: merc xr2
Cruising area: bournemouth bay
Join Date: Jan 2006
Location: poole
Posts: 1,681
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The phantoms are quick, with 150hp thats for sure, when we raced a standard lay up Ring 21 with the 150 of its day it ran 58mph, 60 on a good day and it was always slightly slower than the phantoms although they may have been lighter, and the opti has a lot more torque spread over a larger range, so I guess they should break 60mph today,if set up correctly
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i can na give her any more captain
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04-07-2006, 01:33 PM
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#15
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Ringle@der
Country: England
Location: Uckfield, East Sussex.
Interests: Water Ski Racing.
Boat name: Both called ‘Irresistible’.
Boat make: Bernico F1 Twin, Monterey 265SC.
Engines: 2 x Mercury 300XS's, Yanmar 315.
Cruising area: South and east coasts. Eastbourne Marina.
Join Date: Mar 2006
Location: Uckfield, East Sussex.
Posts: 758
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Have you tried any over the hub exhaust props? I can't get my Ring 21 to perform with any thru the hub. Last year tried a slightly worked 24" small hub Trophy that is through and over and the results were terrible - no pull out, chine walked like a b*****d and poor top end. With a laser again very poor acceleration.
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04-07-2006, 01:47 PM
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#16
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Registered User
Country: UK
Location: Surrey
Boat make: Ring 25 Sportscruiser
Engines: Mercruiser 496 HO
Cruising area: Solent
Join Date: Apr 2004
Location: Surrey
Posts: 151
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First used a standard Laser 2 23 - aceleration once on plane good, although lots of cavitation getting there, also broke free too easily in turns even when trimmed right in. Handling very twicthy (very prone to chine walking).
Also tried small ear chopper prop approx 25-26 inch pitch, after initial cavitation gripped really well, although under pitched and therefore not getting best top speed. Handling good, much less chine walking. Prop had been worked and so not sure of exect diameter etc, may be a standard 25/26 inch chopper would give a better top speed ?
Large ear chopper prop (Chopper 2) 26 inch picth unusable as far too much stern lift and boat steered by nose above 50 mph.
Best prop so far is the tempest which is blue printed by Propellor revolutions and down pitched from 25 to 24. I would like to try a standard 24 inch pitch to compare to the current one.
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04-07-2006, 01:58 PM
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#17
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Ringle@der
Country: England
Location: Uckfield, East Sussex.
Interests: Water Ski Racing.
Boat name: Both called ‘Irresistible’.
Boat make: Bernico F1 Twin, Monterey 265SC.
Engines: 2 x Mercury 300XS's, Yanmar 315.
Cruising area: South and east coasts. Eastbourne Marina.
Join Date: Mar 2006
Location: Uckfield, East Sussex.
Posts: 758
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I used to have a four bladed Rolla ( 2 blades @ one diameter and 2 @ another and 2 blades @ one pitch and two @ another) which was the dogs...... but somebody lost that for me at the bottom of Loch Earn. I am looking forward to trying a new Lightning ET which I've got from the states. Other options include the Yam and possibly the Mazco.
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04-07-2006, 02:29 PM
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#18
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Ringle@der
Country: England
Location: Uckfield, East Sussex.
Interests: Water Ski Racing.
Boat name: Both called ‘Irresistible’.
Boat make: Bernico F1 Twin, Monterey 265SC.
Engines: 2 x Mercury 300XS's, Yanmar 315.
Cruising area: South and east coasts. Eastbourne Marina.
Join Date: Mar 2006
Location: Uckfield, East Sussex.
Posts: 758
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The original owner of my Ring 21 hired the lake at the National Water-sports Centre, Holme Pierrepoint for a day. He also took Mark Wilson of Rolla props fame with his old coach cum workshop conversion. Starting with about twenty props on the lake they found the best two before Wilson worked on them and the best one on the day was the one that came with the boat. 26" overall pitch @ 7100/7200 rpm.
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04-07-2006, 02:33 PM
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#19
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Registered User
Country: England
Location: Cornwall
Occupation: Civil Engineer in the water industry
Interests: Powerboat racing, travel, curries, zimmers
Boat name: "N" Class fabrication
Boat make: B23
Engines: 200XS
Cruising area: Torbay & Falmouth
Join Date: Jul 2005
Location: Cornwall
Posts: 478
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Quote:
Originally posted by PuppiesBalls
[B]Ian runs a laser 2 though.
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If you mean me, then I am sorry to contradict you but I certainly dont use a laser. Tried a 23 in testing and it was useless. We run either a trophy or tempest depending on which one falls out of the car boot first!
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04-07-2006, 02:41 PM
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#20
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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Quote:
Originally posted by "Old beardy"
If you mean me, then I am sorry to contradict you but I certainly dont use a laser. Tried a 23 in testing and it was useless. We run either a trophy or tempest depending on which one falls out of the car boot first!
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what the quickest prop you have used?
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