How Fast Is Your Boat?

[TIM]

we have seen 46.8knots or 54mph, on GPS, in fairly flat water .. but its not set up perfect ......

[Jimbo]

Had Greyhound at over 43kts earlier in the year (Ribtec 585 with Yammie 115hp 2 Stroke Outboard on her). Mind you, I had absolutely no gear on board (2 fat gits though), and was pulling over the max RPM owing to the engine over fuelling. Get 38kts reliably.

http://rib.net/forum/attachment.php?attachmentid=17992

[Bigmuz7]

Have posted this elsewhere on this forum. 8.5 Hull 275 Verado 2 up full tank 63 mph trimmed to the limit, but motor still had 500 rpm to go if I had the right prop, but tbh, I dont think it would go that much faster if I had the revs. Sea wasn't flat calm on the day either, mind you I lost two caps and me wig hehe

[Will Lankston]

Thats FAST ! Have u seen the Ribeye By Pascoe SR9 outboard version twin 300 hp does 90 miles per hour only drawback is the £110,000 price tag

[Cypman]

My Humber 6.3m Ocean-Pro does 39.5 kts fully fuelled, all normal kit on board and with 2 not so light!! people. The engine is a Suzuki DF140 turning an aluminium 21in pitch prop (Standard Suzuki Fit)

[qcamel]

My last boat was an 8.1 Scorpion and with an Optimax 225 she recorded 54.6 knots on the GPS with two on board and 50 gallons of fuel.

Ollie

[timw]

RIBEYE 750, Yamaha F225

57 mph in central London on Thames (perfectly legal)

[Will Lankston]

Originally Posted by timw

RIBEYE 750, Yamaha F225

57 mph in central London on Thames (perfectly legal)

What would one of those be like on fuel???

Cheers

[qcamel]

Originally Posted by Will Lankston

What would one of those be like on fuel???

Cheers

at that speed its best not to think about it too much!!

[Lostboy]

Depends which prop I have on as to the speed I can get. Most of this season it has been rocking a 15 pitch as it's done a fair bit of skiing and wakeing etc and the pull from that prop is better for that but means it's a 36 knot max (which it can achieve loaded/unloaded it doesn't care). I also have a 19 pitch which with two people and lots of sailing kit has seen 45 knots without any problems.

I know the Optimax engined version in Portsmouth is carrying a 21 pitch and has been above 45 knots.

[donutsina911]

Ballistic 7.8 Commercial, E-tec 250, 75% fuel, 4 onboard, solent chop during Cowes Week, 53.9 knts

[TJ101]

Originally Posted by Will Lankston

What would one of those be like on fuel???

Cheers

Mmm, I can only go with the amount I have put in, brim to brim !!

105 lts in 9 hours running, 11.66lts per hour!! maybe 1/3 at tickover, 2/3 at 3-4000 rpm, plus a couple of runs, just to see

speedwise, too busy looking where she going to watch the plotter, but just over 50knots (58mph) on the gps, full 160lts fuel, 4 up, and only at a tad over 5,000 revs,on the large four blade revolution prop ,so a few left to find maybe with the smaller 3 blade, will hit the revs ok, believe she was sea trailed at 69mph !!

[Bigmuz7]

Originally Posted by Will Lankston

Thats FAST ! Have u seen the Ribeye By Pascoe SR9 outboard version twin 300 hp does 90 miles per hour only drawback is the £110,000 price tag

Yeeeeeeeeeeeees Jeremy paxman stylie well mine was a snip at almost a third of that. Should say the prop is a Merc stainless Tempest II 21 " .. nice gear. Because of the Verado height you get a bit of slip to start with but when up , the thrust is relentless, even at 4k rpm , hit the gas and your off again woof !!

[richardjawilson]

53 mph, Thames central London, 1 up, 100 ltrs.

[Nick Hearne]

46 Knots

[floater]

Avon 4.00 yam 30hp 1 up 33mph (down hill) 26-30 normal upto 4 people

also


http://www.jcbdieselmax.com/html/home.php

for those that missed it JCB have set new world land speed record for a diesel powered car (CAR ?)

any body got any contacts there to see if they fancy marinizing the engines and droping them in my 4 metre avon see how fast it goes then .... strainght down no dout !!!

[Bigmuz7]

Yea after holding lots of other boats up for ages before it did so

[jellis]

Fast enuff! - to frighten the life out of me!

[BogMonster]

Originally Posted by floater

for those that missed it JCB have set new world land speed record for a diesel powered car (CAR ?)

any body got any contacts there to see if they fancy marinizing the engines and droping them in my 4 metre avon see how fast it goes then .... strainght down no dout !!!

There may be a drawback to that though - the life expectancy of the highly tuned 444 engine was only 2 hours running time which could prove a tad expensive on a long term basis

[eupa]

50+ knots

Jonathan