Re: [PSUBS-MAILIST] Interest in your project

Vance,

Concur, fast resolve sonar would be a big plus. Also I would like to add underwater communication equipment and an emergency beacon that would activate if submerged and a loss of primary and backup power event occurs. My goal is to get the boat fully functional as is and then look at these additions down the road. As to loitering speed maneuverability, yaw and pitch control should be fine but roll control will not function as needs speed to overcome GB-GC righting moment. I will give you a better answer after I do the open water test sequence.

Cliff

Great works are performed not by strength but by perseverance.
Samuel Johnson

----- Original Message ----
From: "vbra676539@aol.com" <vbra676539@aol.com>
To: personal_submersibles@psubs.org
Sent: Friday, July 13, 2007 10:09:39 AM
Subject: Re: [PSUBS-MAILIST] Interest in your project

Cliff,
Eight knots is...what? Call it thirteen feet per second. Even in good viz, say 50 to 70 feet, that's five seconds or less of reaction time, more or less. That'll be fun as all get out in mid-water, but close to the bottom, I'm betting you'd be much happier with a fast resolve sonar. Any plans for something like that stuck in the nose somewhere? How does the boat do at loitering speeds? I have to tell you, it's an absolute beauty. Congratulations. And would I like to get my hands on it? You bet'cha!!!
Vance

-----Original Message-----
From: Cliff Redus <cliffordredus@sbcglobal.net>
To: personal_submersibles@psubs.org
Sent: Thu, 12 Jul 2007 8:13 pm
Subject: Re: [PSUBS-MAILIST] Interest in your project

Paul,

The starting point on the profile was a NASA low drag profile. I then looked at fast marine life such as the Orca and tried to incorporate some of their features into aircraft life control surfaces. The aft control surfaces are mounted on an articulated jet ski nozzle that has small hydraulic cylinders the control pitch and yaw movements. The port and starboard ailerons are hydraulically coupled and can be controlled with a joystick via the PLC. These give me roll control. My goal with the design is to be able to fly the boat underwater with the same type of stick and rudder pedal movements you would have in a small plane. The design objective of the boat is far removed from a more conventional psub like the k boats.

The ultimate destination for the boat is the caribbean where the water clarity can support the speed.

Cliff

----- Original Message ----
From: Paul Kreemer <paulkreemer@gmail.com>
To: personal_submersibles@psubs.org
Sent: Thursday, July 12, 2007 5:19:26 PM
Subject: Re: [PSUBS-MAILIST] Interest in your project

I have to second that "Wow!" Nice engineering.

Cliff, how did you design the hydrodynamics? Some aircraft techniques? I see a prop, wings, control surface, etc...

And what kind of water clarity are you aiming for when testing that top speed?! :-) Or rather, I didn't see any sonars spec'd in your description.

Paul

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