RE: [PSUBS-MAILIST] Submersible Ekranoplan Hydrobatic Trimaran Design Concept

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.
- 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://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&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