Centreboard slot strips - worth it?
Posted 03 June 2012 - 01:04 AM
Reading other threads I get the impression that they are a pain to install and don't last very long. As we wet-sail our boats we may not see them for a while if they come loose, which I expect would be much worse than not having them at all. We'd have to antifoul them too.
Does anyone have any (quantitative?) info on how effective they are for flow improvement/speed increase?
Posted 03 June 2012 - 01:54 AM
Posted 03 June 2012 - 04:09 AM
Absolutely worth it. Contact your local sailmaker to meet you at the boat during your next haulout. He can measure and make you a centerboard gasket. You will need a strip of brass or stainless steel quarter oval to attach down each side of the slot. I would recommend going on the 'Flying Scot' website forums and get some info on how they make and install theirs. If you keep the boat in the water you can coat it with bottom paint once installed.
The only thing worse than no gasket is having a gasket HALF attached!
Make sure you secure them firmly if you wont be seeing them for a while.
Leaving a small V shaped gap in the gasket at the back of the case allegedly allows some of the 'static' water in the case to venturi out, reducing the weight the boat has to cart around. Does a Jubilee go fast enough? Is it permissable under class rules?
Do the Jubes still sail out of Brighton?
Posted 03 June 2012 - 04:30 AM
Class rules (written in 1930s) are silent on them.
Jubilees normally are displacement boats, upwind normally about 5kts in a reasonable wind, don't plane easily, need 20+kts, then we do 9+. Good fun!!
Major Melbourne fleet is from Brighton,others at Sorrento and Ballarat. Sydney fleet is on Pittwater.
Any idea on speed difference with/without gaskets?
Posted 03 June 2012 - 06:13 AM
Posted 03 June 2012 - 08:05 AM
Posted 04 June 2012 - 04:26 AM
Slot gaskets are absolutely vital for racing performance.
I swapped mine over a few years ago, the ones that were there (and still effective, if a little mishapen) would have been over 20 years old. Mine are screwed through an aluminium half round. I was going to replace these with batten material but never got around to it.
Posted 04 June 2012 - 07:22 AM
The boats here tend to glue theirs on with whatever glue takes your fancy, and then put some kind of tape (can you get 'go fast tape' over there?) on the edges to make it streamlined.
Posted 04 June 2012 - 08:26 AM
Planning a major haulout / refit this winter so I'll do it then. Probably use SS half-round; don't trust adhesives under water!
Posted 04 June 2012 - 11:42 PM
Posted 05 June 2012 - 12:30 AM
Posted 07 June 2012 - 08:43 AM
Posted 07 June 2012 - 11:01 AM
There is no cover on it; it just goes straight on and is stuck on simply with Stikafix.
The hardest bit of replacing it is removing the old glue. You will need a sharp chisel.
Once it starts to go gallons of water get into the boat when we're sailing fast or in any bit of a lumpy sea.
Posted 07 June 2012 - 11:42 AM
You should try packing the case as had been said before, that will make a big difference to your speed, well relatively speaking!
The only thing to be careful of if doing that is to make sure not to pack it too tightly, as a board that takes longer to go down or will only go down halfway will have you in a world of pain!!
Posted 21 June 2012 - 08:26 AM