|
06-06-2006, 02:17 PM
|
#1
|
Registered User
Location: Bournemouth
Join Date: Mar 2004
Location: Bournemouth
Posts: 391
|
Nice Rear
Spotted this at Cobbs today on a Fountain
__________________
__________________
You can never go fast enough...
|
|
|
06-06-2006, 02:18 PM
|
#2
|
Registered User
Location: Bournemouth
Join Date: Mar 2004
Location: Bournemouth
Posts: 391
|
#2
__________________
__________________
You can never go fast enough...
|
|
|
06-06-2006, 02:24 PM
|
#3
|
Registered User
Country: uk
Location: Lancaster
Occupation: Ambulance Chaser
Interests: Sailing and going slowly.
Boat make: loser pussycat
Engines: V8
Cruising area: Used to be Windermere!
Join Date: Jan 2006
Location: Lancaster
Posts: 74
|
Sexy!
What do those bits of stainless pipe running alont the top of the shaft housing and then vertically do? - swim plaform washers??
|
|
|
06-06-2006, 02:54 PM
|
#4
|
Registered User
Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway
Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
|
Looks like pipes to force exhaust ventilate the propellers.
|
|
|
06-06-2006, 04:19 PM
|
#5
|
Registered User
Country: uk
Location: Lancaster
Occupation: Ambulance Chaser
Interests: Sailing and going slowly.
Boat make: loser pussycat
Engines: V8
Cruising area: Used to be Windermere!
Join Date: Jan 2006
Location: Lancaster
Posts: 74
|
Yes, now you say that I can see that they would have that effect.
|
|
|
06-06-2006, 07:49 PM
|
#6
|
BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
|
The exhausts are seperate - you can see them above - they just suck air down when getting going, it's the same as directing exhausts onto the props or the vent holes built into props, it lets the props spin up instead of stalling the engine and allows it to get in the powerband, they are more often seen on deisels though I think - any idea what power is on those?
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
|
|
|
07-06-2006, 08:54 AM
|
#7
|
Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
|
Quote:
Originally posted by Cookee
any idea what power is on those?
|
ALOT.?!!?
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
|
|
|
07-06-2006, 09:24 AM
|
#8
|
Registered User
Country: uk
Location: Lancaster
Occupation: Ambulance Chaser
Interests: Sailing and going slowly.
Boat make: loser pussycat
Engines: V8
Cruising area: Used to be Windermere!
Join Date: Jan 2006
Location: Lancaster
Posts: 74
|
Cheers Cookie, so they have a sort of clutch effect allowing the prop to slip so the motor has a chance to get going, cunning.
|
|
|
07-06-2006, 09:45 AM
|
#9
|
member
Join Date: Apr 2004
Posts: 1,039
|
great looking bit of kit, Wouldn't like to get tangled up with them, good for mincing too...
|
|
|
07-06-2006, 09:54 AM
|
#10
|
Registered User
Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway
Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
|
Quote:
Originally posted by Cookee
The exhausts are seperate - you can see them above - they just suck air down when getting going, it's the same as directing exhausts onto the props or the vent holes built into props, it lets the props spin up instead of stalling the engine and allows it to get in the powerband, they are more often seen on deisels though I think - any idea what power is on those?
|
I thought they might join the exhausts to the drive mounted pipes with a flexible duct similar to the fb design trimax drives?
Fountain used to do a 42 Lightning with 2 x 420-hp Yanmar 6LY2A. Maybe they have added one in the middle? The old one used to top 66 knot.
|
|
|
07-06-2006, 10:22 AM
|
#11
|
Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
|
great bit of kit and love the drives but it looks bit forced in and untidy to me.... i would have thought smooth stainless bends would have made better airflow etc too or do you think that dont matter....???
|
|
|
07-06-2006, 11:35 AM
|
#12
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
Doesn't need it. It's just gives it a helping hand to get up on the plane. As the props start spinning up, they suck a bit of air in helping em slip a bit to get the weesels boosting. Once fully planing, top half of the prop is out of the water.
I agree it looks a bit silly, but not as silly as a boat that won't plane.
|
|
|
10-06-2006, 02:58 AM
|
#13
|
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
|
Quote:
Originally posted by Matt
I agree it looks a bit silly, but not as silly as a boat that won't plane.
|
Watch it buddy.
__________________
I thought that having more patience was a result of my getting older. Turns out that I just don't give a sh*t.
|
|
|
10-06-2006, 08:27 AM
|
#14
|
Registered User
Country: Lymington UK
Join Date: Mar 2004
Posts: 501
|
yes pretty sure 3 x yanmar 440 or if new maybe the 480hps, saw a few for sale over in florida.
I heard that this was turning up as the broker shop in westbourne is a fountain dealer and mentioned it...
hope it stays local then we can see for ourselves whether fountain are as good as they say they are.
nice to see it out in the force 4/5 today!!
__________________
|
|
|
|
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 On
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|