Lifting Strake Width

Hello,

I am currently designing a 100' planing craft with a deep V. I have defined the chine and am currently looking to put lifting strakes on the vessel.
I am fine in terms of arrangment but I can't find any information on how wide the strake should be (to produce enough lift) for a roughly 130 tonne vessel.
Are there any calculations or graphs I can use?

Thanks,

Lewis

 

what is your cruising & max speed???

 

The "lift" will be largely hydrostatic in a 130 ton 100' boat unless it is jet propelled. And I don't mean water-jet !

 

28 knots maximum speed and cruising is 22 knots

 

Assuming the LWL is about 90', these speeds are not good for a deep V planing hull form: your speed/length ratios are 2.9 and 2.3 respectively... way below minimum planing speed. You should be looking at a more suitable hull form like a semi displacement/semi-planing. All the strakes will do at your speeds will be to increase resistance, fuel consumption, maintenance, costs, etc).
- posting a drawing or sketch of the "Hull Lines" might help everybody involved

 

Savitsky will work. This strake is part of projected area of the planing hull. This strake should not be taken in isolation.

I remember there is an Excel spreadsheet posted here in the forum by Dingo. This should aid you in the calculation.

 

More a case of a device to stop water climbing up, on the forward part of the bottom, with such a boat.