Reply
 
Thread Tools Search this Thread
 
Old 20 November 2006, 12:27   #1
Member
 
Country: UK - England
Town: Aylesbury
Length: no boat
Join Date: Jul 2006
Posts: 345
Trim Tab Placement

I want to fit trim tabs to my 4.5m rib to give the stern some extra lift as I have just installed a larger fuel tank under the console, but the shape of my hull is causing me a few problems, the correct size tabs for the boat (fixed ones by Plastimo) (and the narrowest I can find for the size boat) will mean that when fitted they will slightly overhang the step/end of the spray rail in the hull at the transom (which is inverted on my hull!)- will this have any noticeable undesired effect such as drag? or would a small overhang have no effect? (see pic attached)

Has anyone used fixed tabs here? do they work or do they take a while to setup to acheive best results? - I could buy a set of Naticus automatic tabs, but would have to buy an underated hp size trim tab plate to get it to fit (also the ram length would interfere with the manufactures plate on the transom - but I could re-locate this)...
Attached Thumbnails
Click image for larger version

Name:	TABS.jpg
Views:	211
Size:	14.9 KB
ID:	23333  
__________________
wavecrosschris is offline   Reply With Quote
Old 20 November 2006, 14:10   #2
Member
 
Country: UK - England
Town: PORTSMOUTH
Make: Avon 5.4, Avon 3.4,
Length: 5m +
Engine: Yamaha 90, Merc 30
Join Date: Sep 2003
Posts: 1,976
http://www.ollysrib.741.com/images2.html

mine work well, nitrogen gas filled smart tabs from nauticus (30/40lb actuators cant remember)
__________________
ollyit is offline   Reply With Quote
Old 20 November 2006, 14:15   #3
Member
 
Country: UK - England
Town: Aylesbury
Length: no boat
Join Date: Jul 2006
Posts: 345
hmm, i might wait for the boat show and have a closer look at those - seems you can only find them online

Do they hang down when they are out the water? or stay put?
__________________
wavecrosschris is offline   Reply With Quote
Old 20 November 2006, 14:27   #4
RIBnet supporter
 
bedajim's Avatar
 
Country: UK - England
Town: Rutland
Length: no boat
Join Date: May 2006
Posts: 2,500
Hi

I had a set on my searider they hang down when you are going slow and lift as the water pressure increases lifting the stern.

you can use a line on them to tie them up if required search "smart tabs" as we put pic in the thread when this came up before

James

http://rib.net/forum/showthread.php?...ght=smart+tabs

The large picture was my setup with the tabs near to the tubes
__________________
bedajim is offline   Reply With Quote
Old 20 November 2006, 21:15   #5
Member
 
Country: UK - England
Town: Near Weymouth
Boat name: Topper Up!
Make: Avon Searider
Length: 4m +
Engine: Selva 50 Hp O/B
Join Date: Nov 2005
Posts: 14
Trim Tab Placement

I have a set of the Automatic Nitrogen gas ram (40lbs) tabs on my Searider 4.7 and they transformed its acceleration and stability especially when 3 up with kit on board. I suspect the fixed type would have been less effective. The placement of the Nauticus (I think?) ones was clearly detailed in the instructions and a small template for was supplied for helping to set the angle of "droop" from the transom. Installation took about an hour taking it steady and reading everything twice. I have also noticed ventilation is greatly reduced in fast turns as the boat rolls less while feeling steadier than before. All In all £130.00 well spent I feel.
__________________
Mark

** Kids in Toppers? ... Like herding Cats!.. But HARDER!!** :-))
westsail1 is offline   Reply With Quote
Old 21 November 2006, 09:21   #6
Member
 
Country: UK - England
Town: Aylesbury
Length: no boat
Join Date: Jul 2006
Posts: 345
Hmm, bit late now, i've ordered the Plastimo ones they were only £50 with the manual-adjust rams and look quite good quality, however they may end up on ebay if they are too big - will have to wait and see I guess!

http://www.marinemegastore.com/jump/...-PLA_38916.htm
__________________
wavecrosschris is offline   Reply With Quote
Old 21 November 2006, 14:51   #7
Member
 
Country: UK - England
Town: poole
Make: ring
Length: 5m +
Engine: 150xr2
Join Date: Mar 2006
Posts: 180
Ah well I guess they are simplicity itself, with now't to go wrong
__________________
ribit is offline   Reply With Quote
Reply

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




All times are GMT. The time now is 06:32.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.