Are Cats Made from Duflex Panel Kits Strong ?

[barnakiel]

Very nice! So we bond to a film which is in turn well bonded to the core. If punctured, water ingress is limited by the core's structure ...

Looks like a good potential. Promises better shear strength of the resultant sandwich than with a foam core.

b.

b.

[44'cruisingcat]

Originally Posted by beiland

Interesting comparision table:

End Grain Balsa Wood used for lightweight structural bonded panels. Comparison Table

Probably should be used to compare each individual characteristic, not the total "score" as some properties would be more important than others, depending on individual use.

[44'cruisingcat]

Originally Posted by barnakiel

Very nice! So we bond to a film which is in turn well bonded to the core. If punctured, water ingress is limited by the core's structure ...

Looks like a good potential. Promises better shear strength of the resultant sandwich than with a foam core.

b.

b.

Not sure how you reach that conclusion. According to their own table, Nidacore has the WORST sheer strength.

[barnakiel]

Originally Posted by 44'cruisingcat

Probably should be used to compare each individual characteristic, not the total "score" as some properties would be more important than others, depending on individual use.

+ after the Rocna case, I will never ever look with anything less than sound criticism at comparisons made by someone who makes the thing being compared ...

;-)
b.

[cat man do]

Originally Posted by beiland

Now that I look at that first image (powercat), I believe it may be a Tenannt design rather than Schionning one ??

The first image was "self designed" though it does appear to have heavy leanings towards Tennant.
But thats not the one I speak of, there was a definite schionning (unless it is a copy ) in the harbour that used polyprop honeycomb.
I went down and checked it out and there were areas, in the right light , with a morning dew and a very keen eye, where you could make out a honeycomb pattern .

[smj]

Could there be a problem with condensation forming in a honeycomb core? If there was condensation in the core and the boat was in below freezing weather there would be a good chance of delamination.

[cat man do]

Originally Posted by beiland

to have a fresh look at this material that I had ignored with initial prejudice for years.

I was initially the same
The first breed that was around several years back had quite a furry (read thirsty) scrim on it plus the scrim to me seemed able to be peeled away easier (pre resin) than I would have liked.
Samples I have seen since seem to be considerably better and if I was needing more sheet material, I would be looking seriously at it for my own use on any flat panel area.

[beiland]

Originally Posted by cat man do

It makes you wonder
There is a 40ft schionning powercat that I know of that used it throughout inc hulls
And there are these using a "same same but different" version
http://www.polycore.com.au/News--and--Events.php

This website reference has them building in Duflex? And there is no specific designer designated.

http://www.powerplaycatamarans.com.a...RPLAY_1480.pdf

Aye, just found their whole website. have to look thru it
Powerplay Catamarans

[downunder]

Originally Posted by beiland

This website reference has them building in Duflex? And there is no specific designer designated.

http://www.powerplaycatamarans.com.a...RPLAY_1480.pdf

That is not a Powerplay Cat.

[cat man do]

Originally Posted by downunder

That is not a Powerplay Cat.

Brian is getting confused

In my post I said I have seen a schionning (or a very convincing copy) built from polyprop honeycomb. (that is vessel one, totally separate from the vessels pictured)

I also said there are two other vessels, (pictures provided) also built from polyprop honeycomb

Originally Posted by cat man do

It makes you wonder
There is a 40ft schionning powercat that I know of that used it throughout inc hulls
And there are these using a "same same but different" version
http://www.polycore.com.au/News--and--Events.php

While the Powerplay certainly looks like a Schionning and I daresay it started out as one, it would seem they are now calling it their own design for whatever reason.

James Dewing , the Designer and builder of PowerPlay Catamarans

Powerplay Catamarans

[beiland]

Originally Posted by downunder

That is not a Powerplay Cat.

I agree, I am somewhat confused....

....maybe because of an association of these two webpages:
http://www.polycore.com.au/News--and--Events.php
http://www.powerplaycatamarans.com.a...RPLAY_1480.pdf

That first site displays a photo of the very powercat that was posted here on the forum. It is signed by Bruce Hodgens. When I google his name I get that second website reference that ties him to PowerPlay cats??

Anyway I'm trying now to sort out if PowerPlay Cats are built of Polycore product or not, and if they had a previous history of Duflex??

[cat man do]

Originally Posted by beiland

I agree, I am somewhat confused....

Anyway I'm trying now to sort out if PowerPlay Cats are built of Polycore product or not, and if they had a previous history of Duflex??

Bruce did some reviews, wrote some articles for magazines and did a "how to" guide . more here
Bruce Hodgens - Google Search
Powerplays are not built from polycore unless something has changed recently, they have always been built from duflex planks as far as I know

[downunder]

Originally Posted by cat man do

Bruce did some reviews, wrote some articles for magazines and did a "how to" guide . more here
Bruce Hodgens - Google Search
Powerplays are not built from polycore unless something has changed recently, they have always been built from duflex planks as far as I know

Don't know but wonder if they are using a mold now they are in China.

Since they moved to China only seem the 3D drawings on website. Have they built a vessel there yet?

[44'cruisingcat]

Originally Posted by beiland

Do you know specifically of that power cat by Schionning design that utilized this 'polycore material"?

I have a gentleman who has expressed the desire to possible utilize NidaCore in the place of Duflex for a Schionning's design. But the response from Schionning would seem as to not recognize this material as a viable substitute to be used for his designs??

The second vessel you posted there became known to me only recently when a gentleman asked on one of the forums if I was aware of this aft-masted vessel. I said no and posted it in my discussions of same.
Lyra's Rig

From the article: "The contention that the rig won't go to windward is codswallop. We travel at a hull speed equal to the true wind speed at 30 degrees apparent under auto pilot and down to 28 degrees hand steering, and the rig still pulls well down to 23 degrees when motor sailing."

Sailing at true windspeed at 28/30 degrees apparent? Sounds good.

[beiland]

...a liitle confused again, perhapos someone can provide additional info?

What is the distinction between?

Polycore Products
Polycore Composites - Polycore Australia - Polycore Honeycomb


...and
Australian Composite Panels
Australian Composite Panels - Lightweight Fibreglass & Honeycomb Materials


both polyproplene honycomb products