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Old 31 August 2006, 10:01   #1
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How Fast Is Your Boat?

Hi Guys
Was given inspiration by a previous thread about speed and am just wondering how fast all of your boats are......
Tell Us about your boat and then how fast it goes please!!!!
Pictures would also be Great!

Cheers
Will
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Old 31 August 2006, 10:51   #2
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My Zapcat does 42mph on GPS, that was in choppy conditions and 2 rather large people on bored. Goes faster with a lighter crew!
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Old 31 August 2006, 11:05   #3
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All time best on GPS now 36.1kt normally tops out at about 35.5 ... however I have a prop with bigger teeth (and less battle scars!) which hopefully is going on this weekend so I might see a few more I hope
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Old 31 August 2006, 11:17   #4
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17.5' Polaris Aluminum RIB/Yamaha F115

Best speed was about 38-39mph with me and dive gear, and most likely a full tank of gas (50gal.) Runs in the 35-36 range 4-up with dive gear. That's assuming it's flat enough to run WOT without having pre-approved chiropractor appointments.

jky
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Old 31 August 2006, 11:50   #5
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6.5 meter Mako with twin 90 Tohatsu TLDI’s

I get 53 mph with 35 gallons and 3 up with a light chop @ 5300 RPM. With 4 divers, 1 driver and 12 tanks I can pull about 35-38 but can only get about 4300 RPM.
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Old 31 August 2006, 12:24   #6
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Nice work so far! Just wondering whether those Tohatsu's are Diesel? Probably a silly question, but i'm new!
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Old 31 August 2006, 12:25   #7
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I was in a7.5mtr XS rib on Saturday with a 200 mercury opti on the back and we got 56mph in it, there was a chop, would like to see what i'd get out ov it in flat calm conditions
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Old 31 August 2006, 12:28   #8
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Yeh i saw u Sammo! That was a nice boat, i was on a course in the green revenger with Gwyn at Pro Powerboat!

Will
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Old 31 August 2006, 13:10   #9
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Quote:
Originally Posted by Will Lankston
Nice work so far! Just wondering whether those Tohatsu's are Diesel? Probably a silly question, but i'm new!
the TLDI in the stands for Two-stroke Low-pressure Direct Injection - so no not diesel!
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Old 31 August 2006, 13:23   #10
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Is it me or can you only get a Diesel Inboard?

Cheers
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Old 31 August 2006, 13:31   #11
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There was something about diesel outboards on here a while back, but they were only about 20 or 30hp I think.

I suppose weight is the killer, same reason you don't get many diesel aeroplanes...
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Old 31 August 2006, 13:34   #12
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Quote:
Originally Posted by Will Lankston
Is it me or can you only get a Diesel Inboard?

Cheers
slight thread drift here, Will - but: generally outboards are petrol. There are some diesel outboards available but they are hugely expensive, and in the UK very uncommon. Inboards in ribs are usually diesel, and in most (but not all) uk boats in general, but in the US petrol inboards are commonplace on hardboats
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Old 31 August 2006, 13:41   #13
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Quote:
Originally Posted by BogMonster
There was something about diesel outboards on here a while back, but they were only about 20 or 30hp I think.

I suppose weight is the killer, same reason you don't get many diesel aeroplanes...
Ha ha yeah i am yet to see a Diesel Jet Fighter either........ Polwart thanks very much for the help but yes again we are drifting.....my fault so back to speeds of your boats
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Old 31 August 2006, 14:07   #14
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You might be surprised. Many jet engines will run on diesel.

Quote:
Originally Posted by Will Lankston
Ha ha yeah i am yet to see a Diesel Jet Fighter either........ Polwart thanks very much for the help but yes again we are drifting.....my fault so back to speeds of your boats
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Old 31 August 2006, 14:11   #15
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I do hope that it isn't the RAF using them...... But moving back to boats and speeds.....again

cheers

will
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Old 31 August 2006, 14:19   #16
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ribtec 535 18 foot, 90 yamaha
approx 45 mph in bit rough weather
loadza fun
djbk
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Old 31 August 2006, 14:25   #17
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Quote:
Originally Posted by Sammo
got 56mph in it,
Was that in the harbour Sammo? I'm sure its 4 knots in the harbour??? I guess the Harbour Master told you that just before he smacked your back side Did you see the pics of the shout, me in a four winns paddeling pool? http://www.pwllhelilifeboat.co.uk/26312.html
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Old 31 August 2006, 14:30   #18
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Have had 53.2 knots, 62mph - thats with twin 150hp Yamaha HPDI engines - on flat water..

But can reach 50 knots in most water - but not fun when you misjudge a wave


With the twin 115's I had before, I got about 43.1 knots, so about 50mph
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Old 31 August 2006, 14:45   #19
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Had a look at that link you pasted in that reply Jono! Seems you have been very busy this month! Especially with the fletcher (speedboat) Cough! Petrol Cough!
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Old 31 August 2006, 14:52   #20
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tornado 5.5 yam 115 2 people 44 knots [50mph] not bad
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