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Old 12 September 2007, 14:08   #141
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Old 12 September 2007, 14:08   #142
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i have just under 50 knots in mine...but the question is ......from 40 to 50knots is a a hell of a difference, to me 40 is a great fast cruising speed with eyes wide open. surely 50 to 70 knots is just darn right scary? Can a rib handle that speed over average waters for a period of time?
Tony
That's pretty fast for a heavy boat with a deep v hull.

What prop are you using?
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Old 12 September 2007, 14:38   #143
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That's pretty fast for a heavy boat with a deep v hull.

What prop are you using?
Sorry Codders, I'm not very technical....Its a Mercury S/Steel HighFive

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Old 12 September 2007, 15:14   #144
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Quote:
Originally Posted by Tony View Post
i have just under 50 knots in mine...but the question is ......from 40 to 50knots is a a hell of a difference, to me 40 is a great fast cruising speed with eyes wide open. surely 50 to 70 knots is just darn right scary? Can a rib handle that speed over average waters for a period of time?
Tony
38kts is great but I get a sharp stabbing pain down my left side at much over 40kts and a strange noise from the seat next to me
but she does help to launch etc
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Old 12 September 2007, 15:18   #145
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38kts is great but I get a sharp stabbing pain down my left side at much over 40kts and a strange noise from the seat next to me
but she does help to launch etc
LOL...
Its so so noisy I cant hear a thing..
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Old 12 September 2007, 18:44   #146
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Sorry Codders, I'm not very technical....Its a Mercury S/Steel HighFive

Tony
What pitch are you running? I have a 4 blade prop which is pretty good but seems to peter out at higher speeds - I thought more blades were better at lower speeds???
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Old 12 September 2007, 19:09   #147
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What pitch are you running? I have a 4 blade prop which is pretty good but seems to peter out at higher speeds - I thought more blades were better at lower speeds???
I'll take a look next time i am at the pontoon..
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Old 12 September 2007, 19:45   #148
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I'll take a look next time i am at the pontoon..
Thanks - the quest for the perfect prop continues!!!
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Old 12 September 2007, 20:11   #149
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Our race RIB managed 84 mph the other day - anyone beat that?

7.4 metres Mercury 2.5 EFI (280 HP) 2 passengers (that's all it'll carry!) Tempest 23 slightly tweaked, modified gearbox, 15" offshore leg, over half fuel (at least 80 litres).
i have had mine at 85 a few times
















does it need to be in the water to count?
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Old 12 September 2007, 20:13   #150
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Quote:
Originally Posted by codprawn View Post
What pitch are you running? I have a 4 blade prop which is pretty good but seems to peter out at higher speeds - I thought more blades were better at lower speeds???
Thats been my finding ... when I went to a four from three, top end was not a lot different, all the benefit was at the bottom end, the four is a better prop IMO
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Old 12 September 2007, 20:23   #151
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Ask John Fuller on Botmad!

Nick
Oh please no ..... I think he's dissapeared back off to 'float bad' for a while, to annoy his own punters for a change.. anyway .. you'd want a valued opinion wouldnt you ?
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Old 13 September 2007, 07:46   #152
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Just put a 19p stainless prop on mine and it's now a comfortable 45k boat. A bit of Solent tide got 47k on the GPS but to be fair this was then 44k on the way back.

Still pulls me out on the wakeboard comfortably as well
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Old 13 September 2007, 12:27   #153
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i have had mine at 85 a few times
















does it need to be in the water to count?
Yes!
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 13 September 2007, 12:29   #154
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Quote:
Originally Posted by Tony View Post
i have just under 50 knots in mine...but the question is ......from 40 to 50knots is a a hell of a difference, to me 40 is a great fast cruising speed with eyes wide open. surely 50 to 70 knots is just darn right scary? Can a rib handle that speed over average waters for a period of time?
Tony
Actually we had one of our leisure boats do 64 mph with my inexperienced girlfriend driving it - 250 Verado, it does over 50 mph without any trouble at all unless it gets bumpy!
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 13 September 2007, 19:59   #155
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Zodiac Medline with 60 yam 4stroke
30knots flat out with 2 kids,wife, dog and the other crap you end up storing and taking out with you when you have big lockers !!!

but still had 20 knots with 9 in it (big teenagers)


Andy
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Old 13 September 2007, 22:05   #156
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Zodiac Medline with 60 yam 4stroke
30knots flat out with 2 kids,wife, dog and the other crap you end up storing and taking out with you when you have big lockers !!!

but still had 20 knots with 9 in it (big teenagers)


Andy
begs the question, if you ejected the wife & big lockers .. and the dog, you might have gained 4 knots.... come on floater this about 'max' performance
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Old 14 September 2007, 12:57   #157
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Sorry Codders, I'm not very technical....Its a Mercury S/Steel HighFive

Tony
We are using the same one. On our boat, acceleration and planing speed became much better. Top-speed remained the same. 51,6kn
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Old 15 September 2007, 06:37   #158
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begs the question, if you ejected the wife & big lockers .. and the dog, you might have gained 4 knots.... come on floater this about 'max' performance
Would the boat necessarily go faster if your wife doesn't have big lockers???
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Old 16 September 2007, 20:41   #159
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Would the boat necessarily go faster if your wife doesn't have big lockers???

dooohhh


the boat not the wife

christ she might read this Gulp !!
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