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RE: [PSUBS-MAILIST] Submersible Ekranoplan Hydrobatic Trimaran Design Concept
Your are both right but i was thinking totally under water kind like this http://spray.ucsd.edu/
but using an internal wing with Coanda effect to accelerate keeping the wings smallish to reduce stress and drag.
i came to the conclusion it is very dangerous if you lost buoyancy control you could become air born or slam in to the bottom at 20mph again it is day dreaming.
Andy J.
---- "Jay K. Jeffries" <bottomgun@mindspring.com> wrote:
=============
Brent,
There has been something nagging me concerning these winged designs and only
now did I figure out what. While they look great, it is going to take a
MASSIVE amount of energy to propel them underwater. At the speeds a Psub
travels at, skin area is the predominate form of friction in the speed
equation. The wings have a very large area so the power required for moving
will be VERY large. Compressibility (the amount of water pushed out in
front of a sub) becomes the predominate factor at higher speeds.
R/Jay
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
It is the mark of an educated mind to be able to entertain a thought without
accepting it.
- <http://www.quotationspage.com/quote/1152.html> Aristotle
_____
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Wednesday, February 07, 2007 5:56 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Submersible Ekranoplan Hydrobatic Trimaran Design
Concept
Andy,
Perhaps if the lower part of the wing can be raised to the level of the main
rear wing I currently have, the entire wing system can be out of the water
when on the surface. It could then be designed to work as a Submersible
Ekranoplan Hydrobatic Trimaran. Can you say More Power, More Speed???
http://de.wikipedia.org/wiki/Bild:Aquaglide_2.jpg
http://www.youtube.com/watch?v=q6HQSNERadQ
I've been thinking about a submersible plane for some time now, and was
working on a ducted fan RC model that would do just that. But a ekranoplan
would be a good start in that direction. Then after that the next step on
the wild side is a Supercavitating Submarine that can fly at mock 2 above or
below the water. <http://graphics.hotmail.com/i.p.emcool.gif>
http://www.deepangel.com/html/supercavitation.html
If I get this job in R & D with Aerocet Inc. then we could perhaps design
and build a amphibious stepped pontoon system for the ekranoplan sub design.
http://www.aerocet.com/mambo/index.php?option=com_content
<http://www.aerocet.com/mambo/index.php?option=com_content&task=view&id=19&I
temid=136> &task=view&id=19&Itemid=136
This is getting way to fun,
Brent
" The difference between genius and madness is a fine line called success."
_____
From: Andy Jensen <drewacard@charter.net>
To: personal_submersibles@psubs.org
CC: Brent Hartwig <brenthartwig@hotmail.com>
Subject: Re: [PSUBS-MAILIST] Hydrobatic Trimaran Submersible Design Concept
Date: Tue, 6 Feb 2007 19:11:15 -0800
>Brent
>My line of thinking was that it would be a larger sub using this method for
long distance traveling using minimum fuel. I was trying to figure out the
folding wing issue also... nothing simple.
>Andy J.
>
>Date: Tuesday, February 6, 2007 8:11 AM
>From: Brent Hartwig <brenthartwig@hotmail.com>
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] Hydrobatic Trimaran Submersible Design
Concept
>Size: 8 KB
>
>Andy,
>
>Very interesting concept for a submersible. The lower wing will give you
some drag when traveling on the surface but that's mostly if your wanting to
go really fast. I'll plan to do a more complicated model of the trimaran
sub that has retractable hydrofoils, for faster as well as smoother surface
running. There would need to be a gas or diesel engine in that model. The
larger size of that model will also require me to design foldable wings. I
have three different mechanical ways to chose from so far, for folding the
wings and wing tip soft or hard ballest tanks for trailerability.
>
>Regards,
>
>Brent
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