Slamming waves and open bridgedeck crossbeams.

[Spiv]

Bob,
Fanie is correct, power cats behave differently from sailing cats.
My first post refers to sailing cats, my last to power cats doing 15 to 30+kn.

I thought for a long time about a wave breaker for sailing cats, but I am not sure if it would work at slower speeds.
On sailing cats, I think it is safer to stick with high bridgedeck clearance and round chines.

[brian eiland]

Originally Posted by Spiv

Frosty,
I had several power cats of different size (23 to 40') and driven others on test runs to try and make up my mind on what to buy. All cats are not the same.
I know this is off the tread subject, but I hope Bob doesn't mind...

What cats have in common is that they (in general) go faster and are more comfortable than monos of same length and power as they (should) ride on a cushion of foam. All my cats did more than 25kn, the Manta 33' did 36kn and it was by far the best.

The idea of a wavebreaker has been used by different design, but the manta carried all the way to the stern and the half bridgedecks were round.
Also, it had asymmetric chines so it would climb on the plane smoothly and react to waves smoothly.

If you are considering doing some mods to your cat, add the wavebreaker, keep it off the waterline and carry it all the way aft. I am sure it will make a big difference, especially at speeds over 20kn.

Hello everyone on this discussion thread. If the subject still interest you please join us over on this other subject thread. I'm trying to consolidate some of these bridgedeck slamming postings into one major subject thread, and I felt that the other one had the more encompassing title.

Center nacelles and wave pounding in cats.

...and Spiv please bring along your diagrams and personal knowledge