Extra Imterceptor permanent

[hkikis]

Hello

This foto is from a friend's boat.
As you see it has a permanent imterceptor to help the bow to go down. Ofcourse except the flaps.

I have same size boat and I don't have this thing. I have only trim tabs interceptors but they aren't enough. The bow even stay quite up even if the tabs are full down.
I am thinking to add something like this in my boat.

What do you think?
Anyone else that have done that?

I just bought my boat. The previous owner add huge swimming platform and 5m rib there instead at flybridge. Also Seakeaper stabilizer that is also heave and full back at stern.
So the boat has to much weight back.
Need some help for better planning.

 

[marcochi76]

This should definitely work. To find the correct "height" of the interceptors is "try and error".
I see other people installing this permanent interceptor either on the surface of a fixed central flap, or on the edges on their 2 moving flaps (but this add additional forces on the flaps and I am not certain this is desirable)
In the picture you showed, the interceptor cover a much larger area, so it should be really effective.

ps: what boat is it?

 

[marcochi76]

I tell you also a story:
on my V39, one of the the 2 flaps was erroneously mounted not flush with the hull, but few mm lower (see pic below)
this was enough to created a lift force only on one side of the boat and I had to correct it with the opposite flap.
Once I discovered this mis-alignement, I remonted the flap flush to the hull and the boat now runs perfectly fine.

This story is just to proove that few mm are enough for generating a lift.

 

[hkikis]

Yes I know that this work is trial and error. And it is very difficult to make adjustable interceptor like that of my friends boat.
I will just screw a hard plastic under the hull to make the "interceptor".
The hard plastic will be something like 15X10mm. The 10mm will be the interceptor.


The boat at the fotos is an Azimut 85!
My boat is an Aicon 85 that I just bought.
Really I feel that the bow is staying quite high..
Ofcourse the tabs that I have they are doing work. For example 1900rpm 16knots without tabs and 18.5 with tabs. As slower rpm as more difficult to keep good planning.
With 60% tanks. Full tanks? Worse!!
My friend's Azimut same or worse than mine.
Same engines c32 1800hp.

As I said I don't have flaps. I have hydro tabs style and I am not sure if they are better than flaps. Maybe worse.

But I think that the problem is that before 2 years the previous owner put a looot weight at stern. Huge lifting swimming platform, huge tender 5m and Seakeaper. All at stern....
They are a lot.

In any case I think that if this 10mm is too much... I will not need to put full down my hydro tabs. Or maybe I can do it with 8mm.
Sure 8mm will do something too.

My friend's was around 10 and he adjust it around 13. He told me that it is better and now need less flaps.

 

[benjenbav]

Is it worth contacting Aicon to see if they’ve got any computer simulations of how big an effect an interceptor would have?

 

[Mr Googler]

Is it worth contacting Aicon to see if they’ve got any computer simulations of how big an effect an interceptor would have?

Or moving the 5m rib too!