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Trim Tabs From America


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Bought them here in the end:

 

http://stores.ebay.co.uk/STREAMLINED-PROPELLER-REPAIRS

 

Seller in the states is:

 

http://cgi.ebay.com/ebaymotors/NEW-Smart-T...sspagenameZWDVW

 

I have bough plenty from the states before and never had much of an issue with import. Once I was charged full whack , but the Ebay seller credited me back - the majoirty of the time they just pass straight through. I have heard about the odd item being destroyed in transit.

 

Pay on your Visa through Paypal and stay in contact with the seller and youll be fine.

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Adam,

 

You are lucky if you avoid duty. Currently many items get through without having duty charged but the post office is getting better at collecting the duty, so don't be surprised if you get charged. ( 17.5 % VAT + 6% ? import duty ). ( They dont collect duty on small value items though, hence the Tesco Jersey duty free outlet.

 

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Easy Terry.

 

Assemble takes 10 mins. Bolting to the transom takes 20 mins max. The instructions are spot on.

 

I didnt like the look of the foam sealing strip so used Sikaflex instead - also dont worry if the brackets and mounts arnt symetrical - the units are not 'handed' so they wont match - critical thing is same distance from the chines each side and the 25 deg mounting angle - but a template is supplied.

 

Let me know if you need any advice.

 

I'm out Mon / Tues for a quick test run - will post findings.

 

 

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Becks,

 

They work on water pressue, which is created by water mving over the plates - in theory the faster the water moves over the plates the greater the pressue and hence the lifting effect.

 

When surfing a following sea, whilst the boat will be going fast the water under the boat will also, meaning I guess, that the tabs will generally be down - but it all depends on the indiviual situation.

 

I havent tried them yet (too windy) but all the reviews and forums I have readt rave about them - as I am only moderatly powered I'm confident they will help.

 

Adam

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Guest Guest_BECKS_Fisherman

Hi Adam,

Thanks for that, I have Lectratabs 12x9 fitted to my day angler and find them very fiddly to adjust them just right, hence my interest in auto tabs. I will await your sea trials with interest.

BECKS

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Hi Adam,

 

I think one of the claims was that these auto tabs can compensate for unequal weight on one side of the boat. Do you know how they do this if they operate on water pressure created by the flow of water.

 

For example, if you were to go out solo, would the auto tabs be able to level out the boat so that it wasn't leaning to one side??

 

cheers

 

BF

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Bob, the theory is that you are in effect making the hull longer beyond the transom which moves the centre of gravity further back when the boat is moving. When a hull moves away from a standstill it is trying to climb out of a hole made in the water by displacement as the boat gathers speed it rises out of the hole as the water resistance becomes greater because of speed. It not that the boat gets lighter it is purely that the water can't get out of the way quick enough, it is then affectively "on plane".With trim tabs it is a case of Weight over area, you are increasing the fooprint of the hull so less H/P is needed to get "on plane".

 

 

As the water passes under the boat it is affected by lamina flow which will cause the water exiting the rear of the boat to curl upwards, the greater the amount of hull in contact the greater the effect, so if you were to lean to the right the water would curl up more on the right hand side of the boat due to a longer hull contact on that side, the trim tab on the right would put up a larger fight to the water curl and try to push to boat to "Equality". I know that it is very important to keep the damper pressures equal on both side of the boat also the fitted positions or you end fighting the wheel all the time (like driving your car with the tracking out!)

 

 

Alan, try going to the site and right-clicking on the link then click "save target as" save the file to your hard drive and run it from media player, seemed to work for me as i had problems i used the link.

 

hope that helps huh.gif

Simon L

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Studied the stuff on their website and noted that the sizing diagrams were all calculated for planing vessels.

 

Therefore, I fired off an e-mail with details of my Orkney and explaining how she porpoises if I trim out at all + chine walks when running at high speed.

 

The response was :-

 

"Use the ST980-40 and yes the porpoising and chine walking will be eliminated. Absolutely!

"

 

Tempting..... - I await Adam's trials with interest.

 

PS; Are the tabs small enough to fit in a suitcase as I have a friend in USA who might want to give them to me as a present !

 

 

 

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