----- Original Message -----
Sent: Thursday, January 26, 2006
12:41 PM
Subject: RE: [PSUBS-MAILIST] Electric
PSUB
Michael,
You made a good start with R/Csubs and reading. I
shall give some awnsers an commets to your questions.
At the list is steel the material of choise for
reliability and ageing reson
60m operating depth
100m crush depth MAX (where I will run
it (fresh water) won't be deeper than that)
[Emile D.L.van Essen] for these depths a safety factor of 2+
is common
1 ATM
Fast
[Emile D.L.van Essen]
Why?
Electric
Cheap as possible
'Trailerable'
No compressed air/CO2
absorbants
[Emile
D.L.van Essen] Ballast control should be done with compressed air. A
life support system is easyer and cheaper than yoiu
think.
Inside I want a seat, can't be doing with
lying on my front.
Ideally 1 man operation for in/out the water
- (Think that's all)
It needs to be as cheap as possible,
however obviously I don't want to endanger my life. So I was thinking
about CCTV cameras on the outside in pressure housing, with a array of
monitors on the inside. Any thoughts? Things I thought about :
Increased temperature and battery draw. This would however, allow me
to bypass the acrylic dome aspect.
[Emile D.L.van Essen] I can help you with a dome (580
mm O.D. @ 30 mm thick) The view is worth
it!
Propulsion. I have a 2HP (36V) electric
motor left over from another project, now would this be enough to propel
me through the water at a reasonable speed? Not sure if you call it
dynamic diving (use of hydroplanes to dive) but that is what I was
thinking and so will need some speed.
[Emile D.L.van
Essen] You can make a R/C sub slightly buoyant and you can dibe
dynamic. A psub need freeboard . Ballast tanks should have 20-30 % boats
volume; that dont dive with
2 HP.
The other thing that I always try to
aim for when I made subs in the past, was to make battery power the only
limiting factor. So things like CO2 absorbant/air scrubbers need to be
'bypassed'. I was thinking about changing the air every 10? minutes so as
to eliminate this problem (open hatch, nothing fancy). Anyone see a
problem with this?[Emile D.L.van Essen] As said, a LSS is not so
difficult but a internal space of 500 liter gives a safe dive time of 1/2
hour. You can use dive gear for
emergency.
Groet,
Emile