around in pocket, I I think so

Re my previous post: - Just started a thread about kites on the ocean, let's see what info comes up . .

 

Good point, big bulbous bows pick up big marine stuff which makes them burn some extra fuel as long as it's there, it only hits the news when they bring a whale on the bulb into port, which is also the first time they hear about it since you can't see it from the ship.

The same goes for a little boat with a little bulb, however it would only catch the named little stuff, which off course will cause some extra resistance . . .

 

On a side note of interest, a few years ago they changed the shipping lane for the approach to Saint John Harbour on the Bay of Fundy in order to help protect the Right Whale and other species as it used to pass directly through an important feeding ground. It is my understanding that this has helped to reduce the number of collisions and propeller strikes. This explains it better...

http://www.rightwhale.ca/shippinglanes-routesnavigation_e.php

 

Why dont they put something like a "beeper" in the bulb,something the wales are capable of "hearing". There surely must be enough research available to produce a noise of the correct Hz that will attract the attention of the wales.
No doubt these creatures are intelligent enough to very soon relate that "warning sound" to danger and avoid being around that source of sound.
With modern technology such a device would cost close to nothing to produce and install.

Detecting the "beep" means: GET THE HELL OUTTA HERE

 

It could be big bulbous bows pick up floating whales that are already dead by some other cause.

 

Below some links I found when looking for info about bulbous bows on relatively small boats:

- Thread on this forum: - Bulbous bow on a sailboat

- Article by George Buehler: - Bulbous Bows ?

- Article by forum member Tad - Roberts: - Bulbous Bows

Small sail boat with bulbous bow​

P.S. - Quote from the video uploader: - バルバス　効いてるのかな？

This is Japanese and means: - Barubasu I wonder if that worked ?

​

‘‘Barubasu’’ could mean ‘‘bulbous bow’’ as I see the same Kanji's below the highlighted part in above picture.​

 

Right: - バルバス - = - ‘‘Barubasu’’ - = - ‘‘bulbous’’ - - - - - - - - ・バウ - = - ‘‘bow’’ -

Link​

​

 

BTW, the bow bulb in one of the pictures there looks similar to Tad's bulb here . . .

The guided missile cruiser USS Cowpens (CG 63) at the completion of its Ships Repair Force (SRF) dry dock period in Yokosuka.​

- - click pic to enlarge - -

Tad Roberts Passagemaker Lite 46plus with a bow bulb.​

They both hardly have a ‘hook’ like shape . . :idea:​

 

So much for that idea........

Perhaps it might help to prevent them from being hit by the propeller....?

 

Hi WindRaf,

Just spotted the new plywood model on your website, looking forward to the data.

Is this a change of plan from steel to plywood or only a thought experiment ?

Good Luck !

 

no, it's a design on request

 

Hi WindRaf,

Just spotted another new model on your website, looking forward for the data.

Is this a change of plan to go with two persons, and is this a steel design ?

For "Fionda" I found "sling" or "slingshot", does it also mean "swing" or "change", or what is the correct translation ?

 

Angélique,

It is a new design 14 ft, on client request, in plywood;

the translation of the name 'fionda' is slingshot.

 

The tumblehome (inward falling top sides) decreases the righting moment in a knock down, so the boat easier rolls further to a complete inversion.

On the positive side, the tumblehome also decreases the boat's inverted stability, so wave impact knocks her easier back on her feet, but this requires that the boot is sealed and all mass securely fixed when this situation occurs.

 

For your steel designs, found below a trick how Grahame Shannon saved weight on his 23' 10" (7.26m) steel Tom Thumb design, which plans are now marketed by Bruce Roberts . . . .

Blue Water Boats ---> List ---> Tom Thumb 24