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Default Actively variable deadrise

On Mar 19, 5:24*pm, "Don White" wrote:
"Vic Smith" wrote in message

...



Not bad when you consider it took Edward G. Robinson 606 tries before
he arrived at the "magic bullet" cure for syphilis.
Killed a lot of people doing it too.
Just like WD-40 is still killing bearings.


--Vic


So it's not a good idea for JohnnyPrepH to lubricate/winterize his outboards
cylinders with WD-40?


Cylinders don't have bearings, idiot.
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Default Actively variable deadrise


wrote in message
...
On Mar 19, 5:24 pm, "Don White" wrote:
"Vic Smith" wrote in message

...



Not bad when you consider it took Edward G. Robinson 606 tries before
he arrived at the "magic bullet" cure for syphilis.
Killed a lot of people doing it too.
Just like WD-40 is still killing bearings.


--Vic


So it's not a good idea for JohnnyPrepH to lubricate/winterize his
outboards
cylinders with WD-40?


Cylinders don't have bearings, idiot.

************************************************

I didn't say they did jackass.


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Default Actively variable deadrise

On Mar 19, 4:29*pm, Vic Smith wrote:
On Thu, 19 Mar 2009 15:14:35 -0500, wrote:
On Thu, 19 Mar 2009 15:46:12 -0400, HK wrote:


Frogwatch wrote:
It seems that deadrise has a radical effect on the ability of a boat
to get on plane quickly and thus use less fuel. *More deadrise makes a
boat punch through waves better but increases draft and reduces fuel
economy in smaller seas. *I assume that variable deadrise has been
tried. *
Hehehehe. You *are* quite the poster.


Hey it's a boating post.
All good ideas are proceeded by lots of bad ones.
WD-40 followed 39 failed attempts.


Not bad when you consider it took Edward G. Robinson 606 tries before
he arrived at the "magic bullet" cure for syphilis.
Killed a lot of people doing it too.
Just like WD-40 is still killing bearings.

--Vic


It's killing bearings because people are using it for purposes not
intended. Water is still killing bearings, too as is sand.
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Default Actively variable deadrise

On Thu, 19 Mar 2009 15:14:35 -0500, wrote:

All good ideas are proceeded by lots of bad ones.
WD-40 followed 39 failed attempts.


My great uncle, before he worked on the atomic bombs, invented a
perfume, Chanel #4, a soft drink, Six-Up, and the five pack of beer.
Finally got something to work: the Little Boy.

Casady


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Default Actively variable deadrise

On Mar 19, 9:08*pm, (Richard Casady)
wrote:
On Thu, 19 Mar 2009 15:14:35 -0500, wrote:
All good ideas are proceeded by lots of bad ones.
WD-40 followed 39 failed attempts.


My great uncle, before he worked on the atomic bombs, invented a
perfume, Chanel #4, a soft drink, Six-Up, and the five pack of beer.
Finally got something to work: the Little Boy.

Casady


My uncle was down there working on the bomb too.. It is a pretty
interesting story.
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Default Actively variable deadrise

On Mar 19, 4:14*pm, wrote:
On Thu, 19 Mar 2009 15:46:12 -0400, HK wrote:
Frogwatch wrote:
It seems that deadrise has a radical effect on the ability of a boat
to get on plane quickly and thus use less fuel. *More deadrise makes a
boat punch through waves better but increases draft and reduces fuel
economy in smaller seas. *I assume that variable deadrise has been
tried. *

Hehehehe. You *are* quite the poster.


Hey it's a boating post.
All good ideas are proceeded by lots of bad ones.
WD-40 followed 39 failed attempts.


Yeah, you'd think a person who claims to have a mechanical engineering
degree would know that.
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Default Actively variable deadrise

Frogwatch wrote in news:571e39b1-f812-459a-b9e6-
:

It seems that deadrise has a radical effect on the ability of a boat
to get on plane quickly and thus use less fuel. More deadrise makes a
boat punch through waves better but increases draft and reduces fuel
economy in smaller seas. I assume that variable deadrise has been
tried. Of course there are boats that try to use hull shape to
accomodate varying conditions but not too successfully.
My Tolman has about 10 degree deadrise and is very light so is very
fuel efficient but pounds a lot in chop so I have to slow down to
about 12 kts. Why not some mechanism that would consist of another
outer variable hull layer that would be hinged at the chines allowing
the keel portion to move downward to increase deadrise. It would have
a flexible stiff plastic piece at the front to keep water out of the
area between the two hulls. Is this simply too complex for too little
benefit?


Having pondered this for a couple of days, I am struck by the problem of
changing the area of the floor between the keel and the chine. This might
be tractable near the transom (overlapping leaves, perhaps, kinda like a
'sliding lapstrake' construction), but as you get near the stem you gotta
worry about major changes in geometry as well as area. I imagine a really
clever designer could do it. I suppose the question is where in the hull
would variable deadrise be most effective in the transition to planing?
That might make an interesting thesis for someone...
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Default Actively variable deadrise

Jim Willemin wrote:
Frogwatch wrote in news:571e39b1-f812-459a-b9e6-
:

It seems that deadrise has a radical effect on the ability of a boat
to get on plane quickly and thus use less fuel. More deadrise makes a
boat punch through waves better but increases draft and reduces fuel
economy in smaller seas. I assume that variable deadrise has been
tried. Of course there are boats that try to use hull shape to
accomodate varying conditions but not too successfully.
My Tolman has about 10 degree deadrise and is very light so is very
fuel efficient but pounds a lot in chop so I have to slow down to
about 12 kts. Why not some mechanism that would consist of another
outer variable hull layer that would be hinged at the chines allowing
the keel portion to move downward to increase deadrise. It would have
a flexible stiff plastic piece at the front to keep water out of the
area between the two hulls. Is this simply too complex for too little
benefit?


Having pondered this for a couple of days, I am struck by the problem of
changing the area of the floor between the keel and the chine. This might
be tractable near the transom (overlapping leaves, perhaps, kinda like a
'sliding lapstrake' construction), but as you get near the stem you gotta
worry about major changes in geometry as well as area. I imagine a really
clever designer could do it. I suppose the question is where in the hull
would variable deadrise be most effective in the transition to planing?
That might make an interesting thesis for someone...




Bring a lifejacket.


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