|
Perhaps "cancel out" was poor terminology. What I'm saying is
the amount of air entering the DG system would be equal to the amount of air
exiting the system if the intake and exhaust were both within the pressure
hull. Correct?
Jim
In a message dated 2/12/2011 6:46:44 P.M. Central Standard Time,
piolenc@archivale.com writes:
They
will not "cancel out" any more than a blower system would. You're
just
circulating air against a local pressure drop caused by the
impeller in
the directional gyroscope's wheel. Net pressure change in
the circuit is
zero.
Marc
On 2/13/2011 4:50 AM, jimtoddpsub@aol.com
wrote:
> Emile, the electric DG's tend to be more stable and accurate
(newer
> technology), but if the intake and exhaust on a vacuum system
are both
> in the pressure hull, they should cancel out. Still I would
only go with
> the electric
> JT
>
> Sent on the
Sprint® Now Network from my BlackBerry®
>
>
------------------------------------------------------------------------
>
*From: * "Emile van Essen" <emile@airesearch.nl>
> *Sender: *
owner-personal_submersibles@psubs.org
> *Date: *Sat, 12 Feb 2011
21:15:14 +0100
> *To: *<personal_submersibles@psubs.org>
>
*ReplyTo: * personal_submersibles@psubs.org
> *Subject: *RE:
[PSUBS-MAILIST] Navigation
>
> Check if you buy one from ebay or
so that it is a electric one.
>
> The air operated are useless .
(overpressure, air consumption)
>
> Emile
>
>
------------------------------------------------------------------------
>
>
*Van:*owner-personal_submersibles@psubs.org
>
[mailto:owner-personal_submersibles@psubs.org] *Namens
*jimtoddpsub@aol.com
> *Verzonden:* zaterdag 12 februari 2011
19:58
> *Aan:* personal_submersibles@psubs.org
> *Onderwerp:* Re:
[PSUBS-MAILIST] Navigation
>
> Dean,
>
> I'm hoping
something practical and accurate is available in an inertial
>
navigation system. What makes that particularly attractive is that it
is
> self-contained and doesn't depend on any external signal. They were
in
> use on the F-4's over 40 years ago.
>
> Jim
T
>
> Sent on the Sprint® Now Network from my
BlackBerry®
>
>
------------------------------------------------------------------------
>
>
*From: *Recon1st@aol.com
>
> *Sender:
*owner-personal_submersibles@psubs.org
>
> *Date: *Sat, 12 Feb
2011 13:43:46 EST
>
> *To:
*<personal_submersibles@psubs.org>
>
> *ReplyTo:
*personal_submersibles@psubs.org
>
> *Subject: *Re:
[PSUBS-MAILIST] Navigation
>
> Jim I think navigation would be a
good topic for this
>
> group to discuss. I for one am at a loss
for a solution.
>
> I so like my gps system on my surface support
boat I want
>
> something decent under water.
>
> How
does the military do it? Lots of money I am sure
>
> but seems
something better than a compass could be
>
> done.
>
>
I am leaning towards a tracking beacon on the sub and
>
> get nav
directions from support boat.
>
> Dean
>
> In a
message dated 2/12/2011 11:42:17 A.M. Central Standard Time,
>
kocpnt@tds.net writes:
>
> Hi
All,
>
> I am beginning rebuilding Bionic
Guppies electronics/electrical
> systems. I am
planning on again using an aircraft directional gyro
>
for navigation.
>
> Before I go
down this road does anyone have a better/different idea?
>
>
Also, Dan Lance, I believe that you were quite pleased with
OTS
> communication system.
>
>
Can you confirm this, and if so provide contact info for a
good
> supplier.
>
>
Best Regards,
>
> Jim K
>
>
------------------------------------------------------------------------
>
>
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