Z-bow

[DHMzip]

Hi,

I was wondering if anybody know more information about z-bows

[jehardiman]

Just an old concept with a different shape and name. Go look at any old baidarka, ram bow or hurricane bulb bow. The idea is to get the bow pressure disturbance out ahead of the actual cutwater while reducing WP area forward but adding pitch damping. Only useful on certian hull shapes.

Compare to an axe bow.

[waikikin]

Alloy Z Cat. 6.5 metre and enlarged version on 2.8 metre beam.

All new 6.5 metre Alloy Z Cat. An extended waterline trailable power catamaran with real style. Beam 2.4 metres. Displacement about 1500kg deep.

PDF: Aluminium Power Cat Series




View Details and Photos


Boden boat plans have one designed by Troy Munnery



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$US 35.00




$US 550.00

[DHMzip]

thanks for your replies.

I am aware of the look and shape of the zbow. I know it is helpful for pitch damping especially for semi-planing hull forms.

"The idea is to get the bow pressure disturbance out ahead of the actual cutwater while reducing WP area forward but adding pitch damping. Only useful on certian hull shapes."

which hull types?
how do you add reserve buoyancy by reducing WP area fwd?
I thought the idea was to increase area fwd of the boat, therefore helping with the boats balance.

how does this compare to an axe bow? is it the same principal with just the top part cut out as a "Z" shape?

if there is a naval architect out there who could give me some sort of mathematical example it would help me solidify this it would be super.

Thanks

[DHMzip]

Also how do z-bows compare to other cat hull bow shapes, such as wave piercing or standard or just super extended

[brian eiland]

I believe they are referring to these as Z-bows??
http://www.oceanfilmboat.com/iweb_pa...ix_angles.html

...to be used on this Journey 46 design
http://www.journeycatamarans.com/


I wonder why we never see any rough water photos??

[Hussong]

I would say that this is an accurate take on the question, Brian.