KamaII

[Bigshrimpin]

http://www.youtube.com/watch?v=ln3Y1A_RNCM

Found this clip on youtube of navatek 25 seafari

[bilgerat]

what the heck : are those fins on the sides?

[DonV]

Good question! Kinda funky.

[shana]

tim nice soft ride wish mine was ready

[shana]

what are those on the sides???

[Blue_Heron]

Originally Posted by shana

what are those on the sides???

Sponsons. He added them to give it more lateral stability and stern lift.

The Kama II belongs to forum member Bigfluke. He has three other 25 Seafaris including one that was converted to a CC. He's the president of Navatek Ltd. in Honolulu. It's worth a visit to their web site for a look around. They're doing some cool stuff with lifting bodies and anti-slamming monohulls

http://www.navatekltd.com/sam.html

The SAM 9 meter is an unmanned vessel they developed for Homeland Security and the hull is based off the 25 Seafari with the sponsons added.

Tim,
Thanks for posting the link. Very cool.

Dave

[cdavisdb]

Makes a lot of sense. With twins and such an extreme deepV, the boat might could use both stern lift and stability. Looks like it worked. Not sure, but the boat seemed a little bit more stable in a beam sea than mine. I wonder how it works at rest? The boat can be pretty tippy at rest and in a big, steep beam sea, the side to side motion gets pretty wild. I thought along the same lines as those sponsons, but could not see a good way to attach something temporarily.

Dave, do you have any info on how well the sponsons worked?

[cdavisdb]

Looked at the Navetek website, answered my question.

Thanks to Bigshrimpin for posting that, fascinating.

[Boatboy6]

Definatly the best running video of a seacraft on the web

[cdavisdb]

This is fun. Navetek has a bunch of other videos up on utube including this one:

http://www.youtube.com/watch?v=32Zvx2swW5U

Main subject is a 51 ft speedboat running fast into a decent size swell. Right behind it and keeping up just fine is one of their 25 ft seafaris.