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22 October 2011, 14:28
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#81
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Member
Country: USA
Town: New Jersey
Make: 733
Length: 7m +
Engine: Yanmar
Join Date: Jun 2010
Posts: 234
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Avon sr6, 150 yamaha 2 stroke, old imperfect 17p ss prop. 24 gal fuel and one up= 48.1mph @5800rpm on gps in flat water. zero chine walk.
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22 October 2011, 14:39
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#82
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Member
Country: UK - England
Town: Plymouth
Length: 6m +
Join Date: Mar 2011
Posts: 2,693
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Lencraft 6.8 Yam 150 2 stroke standard prop not trimmed out kicked out 49mph 2 fatties up and 60 litres of fuel onboard
Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
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24 October 2011, 11:57
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#83
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Member
Country: UK - England
Town: Ipswich
Boat name: Jammy Dodger
Make: Avon Adventure 7.20
Length: 7m +
Engine: 200 Yamaha
Join Date: Dec 2008
Posts: 365
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Avon Adventure 7.2M with Yamaha 200 - 4 Stroke - 57 knots over water.
Avon Rover Rib 2.8M with Yamaha 9.9 - 2 Stroke - 22 Knots
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24 October 2011, 20:04
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#84
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Member
Country: UK - England
Town: Manchester
Boat name: "mr Jingles"
Make: Ribcraft
Length: 5m +
Engine: 130 Etec
MMSI: 235074968
Join Date: Jun 2009
Posts: 1,401
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43 knot with 4 fattie,s on board & a load of fishing gear 
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24 October 2011, 20:15
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#85
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Member
Country: UK - England
Town: Ashton-under-Lyne Lancs
Boat name: IMOGEN
Make: Air-Craft 5.4
Length: 5m +
Engine: Suzuki df70a
MMSI: 235087492
Join Date: May 2010
Posts: 7,078
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Quote:
Originally Posted by hadd
43 knot with 4 fattie,s on board & a load of fishing gear |
Ermm you mean 3 fatties  I'm nice and lean
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24 October 2011, 20:39
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#86
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Member
Country: UK - England
Town: Manchester
Boat name: "mr Jingles"
Make: Ribcraft
Length: 5m +
Engine: 130 Etec
MMSI: 235074968
Join Date: Jun 2009
Posts: 1,401
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Quote:
Originally Posted by kerny
Ermm you mean 3 fatties I'm nice and lean |
With a  belly
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25 November 2011, 16:31
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#87
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Member
Country: USA
Town: New York
Boat name: Aperture
Make: 7m Willard /Avon SR4
Length: 7m +
Engine: 6BT / 50Hp Yamaha
MMSI: 338108624
Join Date: Nov 2010
Posts: 23
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repowered my Avon 4m Searider with a 2 stoke 50hp Yamaha and she's running 48knots with 2 people on flat water.
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26 November 2011, 01:16
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#88
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Member
Country: UK - England
Town: Leicestershire
Make: Ribcraft 4.8
Length: 4m +
Engine: Tohatsu 70 HP 2 st
Join Date: May 2009
Posts: 199
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You mean 38 Knots ?
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26 November 2011, 02:06
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#89
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Member
Country: USA
Town: New York
Boat name: Aperture
Make: 7m Willard /Avon SR4
Length: 7m +
Engine: 6BT / 50Hp Yamaha
MMSI: 338108624
Join Date: Nov 2010
Posts: 23
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she cruises nicely at 38 knots but WOT is 48 knots with 2 persons on board and 12 gallons of fuel. I'll check what prop I got on the engine.
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26 November 2011, 02:57
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#90
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Member
Country: Australia
Town: Sydney
Boat name: Lunasea
Make: Ribtec 890SX
Length: 8m +
Engine: Yamaha ME 421STI x 2
Join Date: Aug 2009
Posts: 475
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Love this thread and want to contribute but I have never been concerned with the actual speed number. I just love the feeling of speed, but in the interests of research I will be quantifying the fleet.
Over the next few weeks plan on taking all the family's RIB's and SIB out for a run with the iPhone gps app. Of course that depends on weather and other commitments.
Anybody wants to take a guess beforehand, you are most welcome.
Zodiac AR340 with a beat up 2001 Yamaha 20hp 2 stroke. Prop came with outboard and i think is 9 7/8 x 11 1/8.
Dockitjet 5.6m with 1996 200hp Suzuki in excellent condition. Has a 3 blade 25 inch prop at the moment. Only ever been run once and bad chime walk at 3000rpm but will raise the motor, put a 4 blader on and some weight in the front to see what will happen.
Ribtec 890SX with twin Yamaha diesel sterndrives 240hp ME421 sti's. Currently had standard Yamaha 21 inch props.
3.2 m no name air floor, inflatable keel Chinese SIB with Mariner 1989 15hp. Not sure of the prop, the only thing i can see on it is A122105P.
Redback Stinger 2.9m rib with Mariner 9.9, about 1990. No idea of the prop.
Zodiac 470 with (2000?) Mercury 50hp. Has a stainless 18 pitch prop.
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26 November 2011, 06:31
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#91
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Member
Country: Other
Town: Rosas
Boat name: Conqueror
Make: Valiant
Length: 7m +
Engine: Outboard 150hp Merc
Join Date: Dec 2010
Posts: 549
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6 Boats! My wife would leave me. 
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26 November 2011, 07:58
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#92
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Member
Country: Netherlands
Town: Breda
Make: Scorpion
Length: 7m +
Engine: Evinrude 250 DI
Join Date: Oct 2003
Posts: 368
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With one person and 100 liters of fuel 103 km/hr = 55,6 kts.
Scorpion 7.5, with Evinrude 250 DI, Tempest Plus 23" Labfinished and Atlas Hydraulic Jack Plate, 4" Setback.
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26 November 2011, 08:42
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#93
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,531
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Quote:
Originally Posted by Courageous
6 Boats! My wife would leave me. |
Just what I thought. 
1 boat - okay, but that's it
2 boats - where am I supposed to park the bl**dy car?
3 boats - your dinner's in the dog (again)
4 boats - someone from the council called to see if you were trading?
5 boats - someone from the Royal Navy called...
6 boats - see you in court!
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Is that with or without VAT?
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26 November 2011, 10:58
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#94
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Member
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,069
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Quote:
Originally Posted by bkils@mac.com
she cruises nicely at 38 knots but WOT is 48 knots with 2 persons on board and 12 gallons of fuel. I'll check what prop I got on the engine.
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I'd be very interested to know the exact spec - my SR4 only managed 37 knots with a Yamaha 50.
If there's a 50 that will give me 48 knots I want one for the current 4M
Duncan
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26 November 2011, 12:36
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#95
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Member
Country: UK - England
Town: plymouth
Make: Ribtec
Length: 6m +
Engine: Mercury 200 verado
Join Date: Feb 2008
Posts: 412
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We ve had 48kts out of my ribtec 6.5 with a 175 opti.
That was a gps 48kts on a perfect flat calm day. 3 on board and 2 lots of diving kit. One of those pieces of kit was a Sentinel rebreather which weighs about the same as the trailer!!
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26 November 2011, 16:30
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#96
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Member
Country: UK - England
Town: Sussex
Make: RIBTEC 655
Length: 6m +
Engine: Yam 150
Join Date: Oct 2007
Posts: 1,160
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I reckon 48 is feasible with a 50hp on a 4m, we've had similar speeds with our Valiant 4.5, 50hp 4 stroke with flat conditions running north of Port Solent 
Seriously though, not had the RIBTEC/115 Merc out on a flat day but the GPS shows a top speed of 36.5 knots, my quickest is 34 so far.
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26 November 2011, 23:58
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#97
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Member
Country: Sweden
Town: Stockholm
Make: KR7
Length: 7m +
Engine: Evinrude 150 H.O
Join Date: Aug 2005
Posts: 735
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KR7 with Evinrude 150 H.O
Raker 24 without using the lift. 5200 Rpm 52,7 knots. 56 With lift...
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27 November 2011, 13:09
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#98
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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Quote:
Originally Posted by bkils@mac.com
repowered my Avon 4m Searider with a 2 stoke 50hp Yamaha and she's running 48knots with 2 people on flat water.
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Well my SR4 with a 50hp 2st Yamie on will do 33 knots on a good day 2 up!!
I do have Dolphin fitted, one of these days I should remove them & see if I can an extra 15 Knots out of her
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Member of the Ribeye supporters club!!!
Member of Bombard 380 Aerotec club
Member of SR4 club
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27 November 2011, 13:17
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#99
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RIBnet Supporter
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,683
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Quote:
Originally Posted by Nick Hearne
one of these days I should remove them & see if I can an extra 15 Knots out of her |
You might have to "Supersize" that 50hp... 
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27 November 2011, 13:22
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#100
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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Quote:
Originally Posted by willk
You might have to "Supersize" that 50hp... |
Maybe you get 1 UK knot to every US one 
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Member of the Ribeye supporters club!!!
Member of Bombard 380 Aerotec club
Member of SR4 club
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"mr Jingle's"
Imogen
Sula
War Shot
