Bow wave cancelation

interesting input guys
Ive been reading up on the whole thing lately and just now getting back to the thread
my thinking was for a passive lifting body
the bulb seems like it plows through the water
the lifting body seems like it flies through the water
the problem that I can see with the whole concept is that there are some articles about bow bulbs that suggest that some of the benefit is in maintaining good trim
basically the tendency of the aft section to squat into its trailing wave is somewhat offset by the tendency of the bulb to want to dig in so to speak
the idea I had originally was to try and get the lift to generate the trailing trough that would cancel the bow wave while at the same time lifting the bow slightly reducing wetted surface area
something tells me it might still work if I had a softened exit and not a submerged transom area under wl or another wing were the trim plate might go to balance things out some
getting to many appendages I know but hey
its planning stages

B

 

Bos, go with a flared bow and a deep forefoot entry. Forget about a bulb.
Stan

 

Boston

You need to ascertain or think about your aim/objective..what is it you are trying to achieve..other than going around in circles looking at different ideas/theories. Until you dicide what it is you want to achieve, it is a constant circular argument. Everything is a compromise...

 

well then think of me like a vulture going round and round just waiting for the best Idea to drop dead

I've had my head burried in home building for way to long and am just now getting back into all the things that made life a joy when I was a kid

who knows were this will end up but I am itching to get back to the water

was planning on the flaired bow and a keel depth entry anyway its just that semi displacement hull types eats power
so I was hopeing to find a few tricks to improve efficiency on the basic displacement hull

Ad
Ive got the main objective stamped on my forehead mate
its written in here a few times in several places and Im hesitant to repeat it

go to the diagonal planking thread I posted a while back if you want a clearer view of what Im up to

the these alternator wind turbines are easy to make thread is were I got the idea and it kinda rolled from there

best
B

 

Boston, if your project is still along the lines previously discussed, then you'll gain nothing from this type of addition to your cruiser.

I have recently done some experimentation with S/L 2.7 and less hull forms, in order to improve efficiency when at their upper speed limits. I've had good success on lean hull forms up to 33' (the largest I've tried so far), being able to reduce the HP requirement to speed and manage the wave train considerably. Drop me an email and I'll tell you about it.

 

it is
wood, steam power, transmissionless, 60', 13 beam, 4.5 draft, low embodied energy,
nothing set in stone but Ild love to get that 9 knots 12 max at 250 hp up to 12 knots 15+ max at 250 hp

would love to hear what your ideas are
B