Reply
 
Thread Tools Search this Thread
 
Old 27 August 2013, 02:22   #1
Member
 
gtflash's Avatar
 
Country: UK - England
Town: southampton
Boat name: TOP CAT 2
Make: Scorpion 8.1
Length: 8m +
Engine: 250hp HO
Join Date: Aug 2003
Posts: 1,318
rib racing, covered bow

Anyone from the old rib racing days, find much improvement in speed by covering the bow? Ive heard a few people mention it, but trying to figure out a way of proving it soon. My rub rail isnt big enough to hook anything onto, and any deck or covered bow id fit, would obviously add weight
__________________

__________________
gtflash is offline   Reply With Quote
Old 29 August 2013, 06:31   #2
Member
 
TomLinley's Avatar
 
Country: UK - England
Town: London/Devon
Make: Linley Swan /Ribeye
Length: 6m +
Engine: Yamaha F150
Join Date: Mar 2011
Posts: 113
The canvas tops used to add speed considerably. On 7m race RIB we gained about 6mph
__________________

__________________
TomLinley is offline   Reply With Quote
Old 14 January 2014, 03:40   #3
Member
 
Petter's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Sarah Hope
Make: Scand
Length: 9m +
Engine: 2 X 5.7 EFI
Join Date: Aug 2006
Posts: 91
Any more details Tom?
Would be interesting to know speed/power and what designed this was.


Quote:
Originally Posted by TomLinley View Post
The canvas tops used to add speed considerably. On 7m race RIB we gained about 6mph
Petter is offline   Reply With Quote
Old 14 January 2014, 04:15   #4
Member
 
biffer's Avatar
 
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
There were some French guys in a rib with a covered front when we went round Britain, it does make a difference, the wind come over the bow and creates a vortex.
There are two main ways of doing it, you can use an acrylic hood cloth or if you want it more permanent you can do a tech layup in GRP, obvious problems with mooring lines etc but worth doing if you want to be more competitive
__________________
biffer is offline   Reply With Quote
Old 15 January 2014, 11:15   #5
Member
 
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
MMSI: TBC
Join Date: Dec 2006
Posts: 4,013
Quote:
Originally Posted by gtflash View Post
My rub rail isnt big enough to hook anything onto, and any deck or covered bow id fit, would obviously add weight
what about gluing some fitting to take hooks under the rubbing strake.. ?
__________________
---------------------------------------------------
Chris Stevens

Born fiddler
Chris is offline   Reply With Quote
Old 21 January 2014, 06:20   #6
Member
 
Roflhat's Avatar
 
Country: UK - Scotland
Town: Isle of Lewis
Make: Ceasar Thundercat
Length: 4m +
Engine: Yamaha 70ces
Join Date: Jul 2010
Posts: 633
RIBase
I'd like to know more about this, what speed were being doing before and after fitting one?
__________________
Roflhat is offline   Reply With Quote
Old 22 January 2014, 16:33   #7
Member
 
gtflash's Avatar
 
Country: UK - England
Town: southampton
Boat name: TOP CAT 2
Make: Scorpion 8.1
Length: 8m +
Engine: 250hp HO
Join Date: Aug 2003
Posts: 1,318
I dont have exact details. It appears with covered lightweight bow most people gained 5ish mph. One person reported increased bow steer so used bow lifting props but nevwr settled the boat with cover. None of my data. Just what others told me
__________________
gtflash is offline   Reply With Quote
Old 29 January 2014, 14:18   #8
Member
 
Roflhat's Avatar
 
Country: UK - Scotland
Town: Isle of Lewis
Make: Ceasar Thundercat
Length: 4m +
Engine: Yamaha 70ces
Join Date: Jul 2010
Posts: 633
RIBase
hmm. covered bow on a thunder cat? has to be worth a go!
__________________
Roflhat is offline   Reply With Quote
Old 03 February 2014, 00:33   #9
Member
 
gtflash's Avatar
 
Country: UK - England
Town: southampton
Boat name: TOP CAT 2
Make: Scorpion 8.1
Length: 8m +
Engine: 250hp HO
Join Date: Aug 2003
Posts: 1,318
I think ill be trying it temporarily, if you can get it to stick some how. Why not
__________________
gtflash is offline   Reply With Quote
Old 03 February 2014, 03:23   #10
Member
 
Cookee's Avatar
 
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
Have you got the engine height spot on? have you moved all the heavy stuff right to the back? Have you tried a few different props? I think all of these would offer at least as much if not more improvement in speed.
__________________

__________________
Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
Cookee is offline   Reply With Quote
Reply

Tags
rib

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 15:30.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.