Mike Kajan Yacht Designs

I would imagine it doesn't matter to some degree what the bow look like above the waterline. Check the link 'Surfer' had attached in a previous post above.

200m deck plan

Layout to come.

53m Axe bow

I hope you guys don't mind me posting some smaller designs while the 200m is taking shape layout wise.

Henning, it sounds obvious when you think of it. I'm surprised there are so many designs out there with this problem.

K1W1, this is fairly new to me so I did a quick search on the Internet and found many interesting facts, thanks for the tip!

Cheers!

Thanks, Far! Yes, I agree. The 640 resolution makes the small lines and details less visible when in white and I think the contrast works out nicely.

25m Axe bow

It's snowing here right now so I thought some colour could brighten things up a bit.

A Happy New Year to you all!


/Mike

73m "Golden Nugget"

Too close to a wedding cake? Please, feel free to comment!

Thanks, YachtNews! I wanted the hull windows to add to the elongated feel of the design, hence the stretched design of the windows, I felt that had the windows been taller, the overall appearance would have been a taller yacht.

I also wanted to design windows not too often seen that would also work with the hull design in general.

And yes, you’re probably right regarding the axe bow concept on a 25m boat.
I thought it would be interesting if perhaps a fellow YF member could shed some light on the matter.

I’m aware of the discussion held some two years ago regarding the axe bow, in the “Axe Bow / Enlarged Ship Study” thread, and I must say, it’s fantastic to see the knowledge and experience fellow members possess.

It would have been interesting if the minimum requirements regarding length, width and height of the hull, if there are any, could have been included in this discussion or is it simply a question of how wet you want to get?

Makes you wonder if there is a way of putting together a formula or chart of some kind with all the aspects such as desired speed, fuel ratio, wave height, pitch, risk of nose-diving, deflecting spray… you enter the inputs and out comes a curve or a chart with recommendations. Neat!

I mean, when is it best to go with a conventional, axe, wave piercing, bulbous or even Lars’ integrated bulbous bow, or is this just common knowledge among N/A’s, from a pure hydrodynamic point of view, all fancy above the waterline design aside?

I guess both Lars/AMG and Palmer Johnson with the latest PJ170 are on to something.

Cheers!
/Mike

25m ver2

If you manage to keep the deck less wet with a less extreme bow, I guess there are other ways to get it wet.
You would probably have to keep it dry when under way but that way the jacuzzi bottom could double as a sky light.

A typical 4 person Jacuzzi has a dry weight of about 200Kg including pumps and nozzles.
If built in carbon fiber you could probably knock some 50Kg off that weight plus the fact that you’re removing some material from the superstructure.

The net weight increase would probably be less then 100Kg = average weight of a healthy Swede.
I’m not totally convinced that it would have any serious negative effect on a 25m boat.

Regarding the lesser advantage of this particular bow, well I assume there are YF members more suited then me to take you up on that.
I wonder where builders like Mulder, Wally, Pinasse to mention a few, gets the idea that it has an advantage? Or is it simply a design trend?