FAST 2015 13th International Conference on Fast Sea Transportation

Your preferred approach is so limited, Leo. For example, where in that does the drinking of beer and swapping of sea stories and other lies with colleagues and peers come in to it?

I saw something posted in a comment section on SNAME about the public release of the proceedings. It was some months out, I believe. But I've got some SES stuff I'll send you a lot sooner than that.

 

Thanks: that would be very useful to me, Bill.

I'm trying to put together material from Chris McK's book and Lawry's
book for the SES version of Flotilla. It's taking me far too long to
write the manual and decide on an output format, so I might just
release what I have sooner than later and modify it in a subsequent
release if users complain.

I want to include as many examples as I can muster that can be compared
to experimental results of resistance, squat and wash. If I don't have
the exact hull offsets, I'm happy to use a reasonable approximation.
For extremely thin and slender hulls of SES precise offsets aren't
critical as long as the length, beam and displacement are close.

I've coded up estimates of front seal drag, similar to the planing
ideas in some of Lawry's (and UMich colleagues') work. I'm not fully
convinced it's the best that can be done and the results of the last
experiments I read weren't very encouraging.

Maybe SES practitioners need beer to convince themselves and others that
they understand how to model and estimate seal drag. I'm old enough
to spout nonsense without beer: my recently prescribed amphetamines
don't work better than alcohol, but I can bs faster and longer than
youngsters half my age now.

 

In calm water, neither of the seals is actually supposed to be in contact with the water surface and typically they are "mostly" not. In waves...that's another matter altogether.

Are you focusing your efforts primarily on the calm water case?

As for wash, as you are already aware, I'm sure, that is the one parameter we almost never try to measure when conducting SES tank testing or even full-scale tests. About the only truly solid wash data I've ever seen for an SES remains classified as far as I know.

 

Yes, calm water only at this stage. If I tried real conditions with waves, that
would certainly drive me to drink!

I know seals are not in direct contact with water, but there are difficulties
(for me) in modelling the small gap behaviour and effects on resistance and
splash. Modelling the seals as planing surfaces does seem to move resistance
predictions in the right direction at low Froude numbers, but as I said, I'm
not all that convinced it is the best way to go. In any case, low speed
performance of SES is not a huge issue for me - it just makes the plots look a
little better when low speed experimental points are included in graphs of
resistance vs speed.

I didn't know that SES wash wasn't routinely measured, but I'm not surprised
- SES testing seems to be a monumental enough task without that
complication.
I'm Ok for that aspect, though, because I have good tank data with
longitudinal wave cuts at different distances from the vessel and at different
speeds. My modelling is quite good for wash because the hulls are so thin and
the theory gives very good results (better than for displacement hulls) for
travelling pressure distributions.

Are there any upcoming conferences that you know of that are more
specifically focused on SES and ACV than FAST? Or are they not a
sufficiently popular type of vessel to warrant separate treatment? (I
appreciate that there are a lot of commercial/military confidences that are in
play too.)

 

All;

One thing that I have been exploring just a bit (mainly because of my panel on ocean renewable energy, where no one has any budget, though those budgets compare well with small craft R&D budgets), has been virtual conferences. There are a couple of apps/services on the web to do this, but I have no experience with them.

Has anyone done this?

What would be needed to reproduce as much as possible the conference experience?

(How did the monuments/food truck thing go, by the way - it sounded like fun?)

 

None that I know of, Leo. As you've correctly noted, there is almost no activity in the design and construction of those types, the Umoe Mandal SES/ACV development work, and repeat ACV builds by Textron and Griffon excepted. It's a desert out there.

 

Yes. Using a service called webex. It is pretty much global. Once you register and sign in, it is better than using Skype, as Skype can only handle 5 different users at once. Well, it was the last time I used Skype for a conference meeting.

Yup. And the conferences that are on show, the papers are either weak or limited and not really saying anything new either.

 

The paper I co-authored on the development and full-scale trials of a heave-stabilized SES windfarm support vessel was well received...lots of comments and after-discussion. So maybe you and I will have something equally worthy ..or maybe even more so..to publish once we've suffered through the delivery of your current baby.

 

Speedy Ocean Vessel -2
A design to build an ocean vessel for speed as speedboat

https://www.kickstarter.com/projects/1648666188/speedy-ocean-vessel-2

What is my invention about? To bring all vessel sail/travel faster in open sea/ocean.

How faster? 1st stage 50 knots, 2nd stage 100 knots and 3rd stage 200 knots as my estimation.

How can I prove it? By a prototype practically travel on ocean.

How long to do the first prototype? 6 months after shipbuilding started.

Do I need help? Yes, are you a professional shipbuilder?

 

And that nonsense has what to do with the FAST 2015 conference and proceedings?

 

Sorry,I thought it was about fast sea transportation

 

It was. Of course it is over too..long since.

 

That nonsense is even more information-free than the American politicians!