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Old 23 May 2011, 08:21   #11
Leapy's Avatar
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,728
Ribcraft 5.3 with Suzuki DF90, one up, low on fuel, not much kit...41.2mph measured with a Garmin 5xxx. Had a bit of tide with me

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Old 23 May 2011, 09:18   #12
Country: USA
Town: Brighton Michigan
Boat name: AWOL
Make: Zodiac
Length: 7m +
Engine: Yanmar diesel
Join Date: Jan 2009
Posts: 92
Gets out to the blue water fast. 48 MPH on GPS. Yanmar 315HP turbo Diesel.
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Old 23 May 2011, 10:28   #13
Country: UK - Wales
Town: wrexham
Boat name: zodiac pro 7
Make: zodiac
Length: 4m +
Engine: outb mariner 50hp
Join Date: Feb 2011
Posts: 18
33mph at the min out of a 1992 50hp mariner and zodiac pro 7
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Old 23 May 2011, 10:46   #14
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,117
Valiant DR 490 circa 28-30 kn. with E tec 60 hp
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Old 23 May 2011, 14:20   #15
Country: UK - Channel Islands
Town: Jersey
Boat name: Archangel
Make: Ribcraft
Length: 6m +
Engine: ETec 225
MMSI: 235063789
Join Date: Sep 2008
Posts: 1,005
Ribcraft 6.8 with 225 ETec: WOT - 47 knots (54mph), cruise - 38 kts (44mph). Best deceleration figure - 7kts to zero, instantly, several times, after running aground or hitting rocks.
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Old 23 May 2011, 14:42   #16
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,793
Os'prey Vipermax 7m -250Etec, best 49.1 knts. Consistantly 47 running a 23P 4 bladed Cyclone, propped for grunt and grip, moreso than top speed.
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Old 23 May 2011, 15:15   #17
RIBnet supporter
jambo's Avatar
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 5,279
I asked the question of Ribcraft themselves and the reply I got was that the max design speed for the 585 was 45 knts. This of course depended on all the usual variencies. I have with two up, no gear. calm had it at 43knts very nice but only for the best of conditions as youra@se is barely in the water!!

'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
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Old 23 May 2011, 22:32   #18
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,618
Polaris 17.5' aluminum RIB (fairly beamy), Yam F115; will touch 40 MPH with just me and dive gear; normally loaded (2 or 3 divers and gear) top is generally about 36 or 37 MPH. 5 or 6 divers drags it down to just over 30.

I usually run with a full or near-full load of fuel, which I think is 30 gallons. I also have probably a couple of hundred lbs of miscellaneous stuff on-board (dive spares, tool kit, extra dive lights, spare lead, etc.)

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Old 23 May 2011, 23:28   #19
Country: USA
Town: Punta gorda Fl.
Boat name: War Machine
Make: Falcon U.S.A.
Length: 9m +
Engine: twin 250 Yamaha
Join Date: Jan 2006
Posts: 936
Faster than a canoe...

Never can remember exactly what the old Raymarine says regarding speed, for me its about the ride which is always enjoyable no matter what speed I'm traveling at... I'd hazard a guess at between 50 and 55 knots top end.
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Old 24 May 2011, 04:14   #20
Country: UK - England
Town: Ipswich
Boat name: Jammy Dodger
Make: Avon Adventure 7.20
Length: 7m +
Engine: 200 Yamaha
Join Date: Dec 2008
Posts: 314
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Originally Posted by Mollers View Post
How were you measuring this?
with my eagle chart plotter/fish finder/gps?

Have I done something wrong? lol

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