 |
|
20-03-2004, 03:48 PM
|
#2
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Dreamers!
__________________
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
20-03-2004, 04:08 PM
|
#3
|
|
Registered User
Location: portsmouth
Occupation: car dealer
Interests: basic racing
Boat name: explosion
Boat make: backdraft
Engines: mercury xr2
Cruising area: solent
Join Date: Mar 2004
Location: portsmouth
Posts: 119
|
physicaly impossible
__________________
whatever floats your boat.....got one again
|
|
|
|
|
20-03-2004, 08:32 PM
|
#4
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
Maybe its fitted with a Ford speedo 
|
|
|
|
|
20-03-2004, 09:28 PM
|
#5
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Or searay!
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
22-03-2004, 02:29 PM
|
#6
|
|
Registered User
Country: Hampshire
Location: The Solent
Occupation: IT
Boat name: Pepsea
Boat make: Tohatsu 6.6 Rib
Engines: Optimax 150
Join Date: Mar 2004
Location: The Solent
Posts: 205
|
Dreaming
|
|
|
|
|
22-03-2004, 02:58 PM
|
#7
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
22-03-2004, 04:48 PM
|
#8
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
That must be nearly 1 mph per hp,
Does a bigger swell make you go faster cause going down a big wave is like going down hill?
So, maybe my estimate of 110 was a little on the low side!!!
I reckon in a 20 foot swell with my 260 hp...................... 
|
|
|
|
|
22-03-2004, 06:45 PM
|
#9
|
|
Registered User
Country: Canada
Location: Newfoundland
Interests: Spreading the good word about boats with toobs
Join Date: Mar 2004
Location: Newfoundland
Posts: 173
|
'slot of it abart.............
'snot 94mph but there is a bloke who reckons on 60kts (thats 66mph for you boy racerz) from 2 x260hp in a 25 Triana. (Nice classic boat though!)
http://www.tmti.net/trianatropica/tropica.htm
EN 
|
|
|
|
|
22-03-2004, 09:52 PM
|
#10
|
|
Registered User
Country: uk
Join Date: Mar 2004
Posts: 4
|
yeah we had a laugh at this
|
|
|
|
|
23-03-2004, 03:44 PM
|
#11
|
|
Registered User
Country: England
Location: South West
Occupation: Development engineer
Interests: Fast boats
Boat name: Xtreme
Boat make: Bernico 21
Engines: Mercury F1, 300 Drag, XR2 "Fingerported"
Cruising area: South West
Join Date: Mar 2004
Location: South West
Posts: 1,043
|
What you mean it won't do this speed 
I've just part exchanged my 300 drag for this rig.
Cyco
|
|
|
|
|
24-03-2004, 09:09 AM
|
#12
|
|
Registered User
Country: Hampshire
Location: The Solent
Occupation: IT
Boat name: Pepsea
Boat make: Tohatsu 6.6 Rib
Engines: Optimax 150
Join Date: Mar 2004
Location: The Solent
Posts: 205
|
Look its true jet boats are faster than those with propellors! who was it that doubted a previous post, honestly experts ha!
T 
http://cgi.ebay.co.uk/ws/eBayISAPI.d...&category=1296
|
|
|
|
|
24-03-2004, 09:14 AM
|
#13
|
|
Registered User
Location: portsmouth
Occupation: car dealer
Interests: basic racing
Boat name: explosion
Boat make: backdraft
Engines: mercury xr2
Cruising area: solent
Join Date: Mar 2004
Location: portsmouth
Posts: 119
|
nice
__________________
whatever floats your boat.....got one again
|
|
|
|
|
06-04-2004, 01:40 PM
|
#14
|
|
Registered User
Country: Hampshire
Location: The Solent
Occupation: IT
Boat name: Pepsea
Boat make: Tohatsu 6.6 Rib
Engines: Optimax 150
Join Date: Mar 2004
Location: The Solent
Posts: 205
|
|
|
|
|
|
08-04-2004, 11:17 PM
|
#15
|
|
Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
|
of course it is! any boat on a trailer is as fast as the vehicle towing it!!!!!!
the OCR boys do around 60mph with 1.8 ltr 130hp engines.
so maybe in a large swell, downhill................................
|
|
|
|
|
08-04-2004, 11:42 PM
|
#16
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Well I'm not so sure, a 135hp ford v6/jet in didy speedboat might top 50, and back in 88 a 1.8 OCR B boat ran almost 69mph (Jeff Locock, on Windermere) probably with an old straight six Merc! so it's not completly out of the question.
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
09-04-2004, 07:06 AM
|
#17
|
|
Registered User
Country: US
Location: Virginia
Interests: Quiet desperation
Boat name: A Little Noisy
Boat make: Excalibur 24
Engines: Express Racing 525
Cruising area: Mobjack Bay (where?)
Join Date: Mar 2004
Location: Virginia
Posts: 1,974
|
94 mph possible but unlikely.
Theoretical top speeds can be easily calculated. Just take max revs X(times) propeller pitch/(divided by) gear ratio X .0094976. Multiply by the inverse of prop slippage (typically 75 -85% for a performance type monohull) and there you have it in mph.
Quick note to Essex Navee from a not quite 'Boy Racer' type - 60 kn is actually 69 mph since 1 knot = 1.15 mph.
__________________
I thought that having more patience was a result of my getting older. Turns out that I just don't give a sh*t.
|
|
|
|
|
10-04-2004, 08:54 PM
|
#18
|
|
hello
Join Date: Mar 2004
Posts: 2,739
|
Super unleaded, maybe that his secret!!!!
|
|
|
|
|
10-04-2004, 09:33 PM
|
#19
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Quote:
Originally posted by Ned
Theoretical top speeds can be easily calculated. Just take max revs X(times) propeller pitch/(divided by) gear ratio X .0094976. Multiply by the inverse of prop slippage (typically 75 -85% for a performance type monohull) and there you have it in mph.
|
So let me get this right, if I put 40" pitch props on my boat, it'll do 100mph!...shit, If I'd known it was as simple as just adding pitch I'd have done it years ago! 
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
10-04-2004, 09:35 PM
|
#20
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Quote:
Originally posted by Ned
94 mph possible but unlikely.
|
It would need to be at least 300hp
__________________
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
