[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PSUBS-MAILIST] Drag

To: <personal_submersibles@psubs.org>
Subject: Re: [PSUBS-MAILIST] Drag
From: "Rick and Marcia" <empiricus@telus.net>
Date: Wed, 20 Sep 2006 20:33:07 -0700
References: <BAY119-F94EA11465DF3EA0509D2FAA220@phx.gbl>
Reply-to: personal_submersibles@psubs.org
Sender: owner-personal_submersibles@psubs.org
Hi, Joe - it's been a while  :-)

What do you mean by psubs speeds?

Rick L


----- Original Message -----
From: "Joseph Perkel" <joeperkel@hotmail.com>
To: <personal_submersibles@psubs.org>
Sent: Monday, September 18, 2006 6:10 PM
Subject: RE: [PSUBS-MAILIST] Drag


> Kory,
>
> Always a worthwhile effort of course.... and a good point!
>
> Some degree of "streamlining" and or stabilization / tracking, may in fact
> be more useful for surface towing at 4 - 5 kts. But for submerged ops
> induced / parasitic drag would still remain negligible at psub speeds as
> demonstrated by JSL, and a host of other research submersibles.
>
> Still....at this point, I expect to have a fair amount of protrusions, so
> preset operational guidelines / limits will have to make up the difference
> for safety as you point out. Reasonable free ascent parameters will be a
big
> part of those guidelines as well as pre-dive planning.
>
> Joe
>
>
> >From: "kory mosteller" <hardcoremosteller@hotmail.com>
> >Reply-To: personal_submersibles@psubs.org
> >To: personal_submersibles@psubs.org
> >Subject: RE: [PSUBS-MAILIST] Drag
> >Date: Sun, 17 Sep 2006 20:45:58 -0700
> >
> >
> >for me, the streamling isn't so much for drag, as to reduce the risk of
> >entanglement.  it's always the last thing you expect that gives you the
> >most grief.
> >-km
> >
> >
> >
> >
> >
> >>From: "Joseph Perkel" <joeperkel@hotmail.com>
> >>Reply-To: personal_submersibles@psubs.org
> >>To: personal_submersibles@psubs.org
> >>Subject: RE: [PSUBS-MAILIST] Drag
> >>Date: Sun, 17 Sep 2006 23:12:30 +0000
> >>
> >>
> >>
> >>Nothing demonstrates Jay's statement quite like the JSL.......
> >>
> >>
>
>>http://oceanexplorer.noaa.gov/explorations/05deepscope/logs/aug31/media/ei
ts_on_sub_rs.html
> >>
> >>This submersible convinced me not to bother with fairings for the
external
> >>air cylinders and battery pods.
> >>
> >>Joe
> >>
> >>
> >>
> >>
> >>From: "Jay K. Jeffries" <bottomgun@mindspring.com>
> >>Reply-To: personal_submersibles@psubs.org
> >>To: <personal_submersibles@psubs.org>
> >>Subject: [PSUBS-MAILIST] Drag
> >>Date: Sun, 17 Sep 2006 19:00:14 -0400
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>At the typical speeds a PSUB travels at, protrusion drag is very small.
> >>There are other issues you should focus on.
> >>
> >>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
> >>ShellyDalg@aol.com
> >>Sent: Sunday, September 17, 2006 6:52 PM
> >>To: personal_submersibles@psubs.org
> >>Subject: Re: [PSUBS-MAILIST] Flow testing-freeboard and swamping.
> >>
> >>
> >>
> >>
> >>Ron. Keep adding your 2 cents. I was thinking of a way to add inflating
> >>ballast to give more freeboard when at the surface. Maybe hidden behind
a
> >>retractable fairing to minimize drag when submerged.
> >>
> >>
> >>Frank D.
> >>
> >>
> >>
> >>
> >>
> >>************************************************************************
> >>************************************************************************
> >>************************************************************************
> >>The personal submersibles mailing list complies with the US Federal
> >>CAN-SPAM Act of 2003.  Your email address appears in our database
> >>because either you, or someone you know, requested you receive messages
> >>from our organization.
> >>
> >>If you want to be removed from this mailing list simply click on the
> >>link below or send a blank email message to:
> >> removeme-personal_submersibles@psubs.org
> >>
> >>Removal of your email address from this mailing list occurs by an
> >>automated process and should be complete within five minutes of
> >>our server receiving your request.
> >>
> >>PSUBS.ORG
> >>PO Box 311
> >>Weare, NH  03281
> >>603-529-1100
> >>************************************************************************
> >>************************************************************************
> >>************************************************************************
> >>
> >
> >
> >
> >
> >
> >************************************************************************
> >************************************************************************
> >************************************************************************
> >The personal submersibles mailing list complies with the US Federal
> >CAN-SPAM Act of 2003.  Your email address appears in our database
> >because either you, or someone you know, requested you receive messages
> >from our organization.
> >
> >If you want to be removed from this mailing list simply click on the
> >link below or send a blank email message to:
> > removeme-personal_submersibles@psubs.org
> >
> >Removal of your email address from this mailing list occurs by an
> >automated process and should be complete within five minutes of
> >our server receiving your request.
> >
> >PSUBS.ORG
> >PO Box 311
> >Weare, NH  03281
> >603-529-1100
> >************************************************************************
> >************************************************************************
> >************************************************************************
> >
>
>
>
>
>
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
>
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> removeme-personal_submersibles@psubs.org
>
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
>
> PSUBS.ORG
> PO Box 311
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************
>




************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 311
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************
References:
- RE: [PSUBS-MAILIST] Drag
  - From: "Joseph Perkel" <joeperkel@hotmail.com>
Prev by Date: Re: [PSUBS-MAILIST] hydraulic efficiency questions
Next by Date: Re: [PSUBS-MAILIST] simple works for me
Previous by thread: [PSUBS-MAILIST] If you have a p-sub?
Next by thread: Re: [PSUBS-MAILIST] Drag
Index(es):
- Date
- Thread