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Old 23 May 2011, 08:21   #11
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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
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Engine: Yanmar diesel
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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
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Boat name: zodiac pro 7
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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
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Country: Ireland
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Make: Valiant DR 490
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Valiant DR 490 circa 28-30 kn. with E tec 60 hp
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Old 23 May 2011, 14:20   #15
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Country: UK - Channel Islands
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Engine: ETec 225
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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
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Country: UK - England
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Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
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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
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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!!

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Old 23 May 2011, 22:32   #18
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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.)

jky
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Old 23 May 2011, 23:28   #19
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Engine: twin 250 Yamaha
Join Date: Jan 2006
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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
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Boat name: Jammy Dodger
Make: Avon Adventure 7.20
Length: 7m +
Engine: 200 Yamaha
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Quote:
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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