Velocity

[j90]

I am just about done a 22 velocity if you want some photos send me your email address. I already have the transom in and the plate cut to the top of the transom doing away with the transom well. Just a side note check your gas tank for any pin holes I had a new tank made since mine had some issues. I spoke to Steve Stepp when I started and everything FUJIMO has said is what I was told. Good luck

[85nova]

I would love to see some pics, email is sickyellow400ex@yahoo.com
I will get some pics up when I get some time, I've got my transom out

[V pads]

My tank had issues as well. That's how my "project" started. I had a new one made after trying to salvage the original. One less worry.

[FUJIMO]

...1/2 inch or even 3/4 inch and would be my choice if anyone asked, until I sat and really thought about it !!

We used 3/8" coring back then because..."we sat there and really thought about it" too. Why would "you" use 1/2" or 3/4"? (this should be good)

[tunnels]

We used 3/8" coring back then because..."we sat there and really thought about it" too. Why would "you" use 1/2" or 3/4"? (this should be good)

Aaaaah an part of an answer to a question with yet another question !! clever . Ok way back in early times very little was really understood about the use of cores everyone used Balsa because that really all there was so to speak !! Then foams came along and hit the market as the be all to end all and the thicker it was the better it was so everything we made using 1 inch thick and we always used contoured foam with all those little blocks so it would conform to different shapes along the hull . Always scrim-side up and simple to lay straight on to wet glass and pressed down then a acetone rag and ripped off the scrim !! no one was concerned about the small gaps between the blocks and what could and would eventually happen if water got in any where !! we just saw it as Amazing stuff and so quick to lay !! wow !! rather than having to use our own magic mix of slurry and pressing the balsa down and drawing the slurry up through to the top surface !!, also used acetone to remove the scrim off the top !! on one ever looked and discovered that the scrim really was a glass mesh material, that came long time later . Most every place I worked most didn't understand very well the relationship between thicknesses of cores as well !! sure they stiffened panels and a little stiffness was all that was required so in the case of 3/8 being used I would say that's what they started to use and it added stiffness and small stringers gave that little extra rigidity that was required so from that day forth that's really how it came to be . In this day and age if you asked a boat builder /designer what core to use they would immediately say 3/4 core because that's what we use .We also now have varying densities as well . Ignorance and lack of knowledge is a wonderful thing and when things work and work well no one ever questions it or really takes to much notice or tries to understand really what and why . Very few builders and any designers understand the concept of flexural strength and what good it can do for you . One it can make a hard riding hull I little softer when you hit waves because its a sprung bottom and it moves up and down , anyone thought about such a thing before ?? not any one I would say !!, the old philosophy if it moves its weak holds true and we all been bought up and caught up with that since day one and nothing has changed . In actual fact flexing makes the panel more robust and will hold together much longer under severe and harsh conditions because it bending over a big area and absorbs shock loads . if a panel is stiff and has virtually no give so damage starts at its weakest point . Usually edges of a stringer and engine beds , edges of cross frames some where were theirs a internal stiffener , the moving panel bends sharply and the core in most all cases is the weak link so the glass lets go off the core and before you know it you have core shear and delamination . So panels that move and in this case use 3/8 core could really have happened purely by accident rather that by clever calculation . !! the glass lay up either side of the core is also a major factor in the flex and that also contributes to its durability ,along with longitudinal stiffeners such as smallish stringers rather than cross frames . I have worked on this concept for a long long time of having flex and twist in hulls and decks because the two go hand in hand specially in the IRB industry and these boats are faster, smoother riding, and all-round more robust ,and lighter and will out perform there floppy bottomed cousins in every situation . So your 3/8 core was it planed or did it happen by accident ??? this is the only boat site I have ever been on where 3/8 core is spec'd for a hull bottom !! So those are my thought on this matter !! Any of this make sense ???

[FUJIMO]

...So your 3/8 core was it planed or did it happen by accident ???

Darn. You finally wore me down. O.K...I'll admit it...It was an accident.

[FUJIMO]

...I spoke to Steve Stepp when I started and everything FUJIMO has said is what I was told.

Of course it was, lol. Thank-you.

[tunnels]

Of course it was. That's because Steve & I go way back & I taught 'ole Steve everything he knows, lol.

Here's a point of interest https://www.navalengineers.org/SiteC...nstruction.pdf This is a new approach and a different way of thinking but I was working on something very close to this along the same lines more than 22 years ago . Materials change over time and make what seems like silly ideas at the time now they are practical and can be made to work .

[Joeb88]

trouble maker.

[tunnels]

trouble maker.

What's your point ?? do you walk through life and never ask questions or want answers to why things are made the way they are ?? me, I question everything !!!

[V pads]

I question why I read all of that.... I enjoy grinding out core better.

[tunnels]

I question why I read all of that.... I enjoy grinding out core better.

what is it that's said ? you can take a horse to water but you can make him drink !! guess it applies !,

[Smoking Joe]

what is it that's said ? you can take a horse to water but you can make him drink !! guess it applies !,

And you can't even get that right. Should read "you can take a horse to water but you can't make him drink".

[OFFSHORE GINGER]

trouble maker.

Yes he is , and that is why he got banned from www.boatdesign.net considering he always likes to think that he is always above and beyond everyone else or should i say he would like to think he is a God , Ha Ha Ha Ha Ha , and what a joke that is ........................

[OFFSHORE GINGER]

Tunnels , or should i say Muddles , you sure are making a great come - back to the forum , and need i say more .......................Ha Ha Ha Ha ...