Re: [PSUBS-MAILIST] Design questions

["Daniel D. Lance" <lanceind@gmail.com>]

For someone just starting out I would highly recommend building a K-250 
first. I would build and operate one of these for a few years before 
setting out to design your own.There is a LOT to learn ! Then of course 
are the logistics of launching and towing a sub to an appropriate dive 
site. Smaller is better. ( K-250 = approx.2200lbs , K-350=4300lbs ) 
Bigger sub, bigger tow vehicle or tow boat. In Florida you can ramp 
launch a K-250 but not a K-350.
As far as using a propane tank for a pressure hull , not even on a good 
day ! Look thru the archives we beat this thread to death at least once 
a year.
Dan Lance


On 1/25/2011 12:31 PM, Benjamin fritz wrote:
> Hey guys,
> I know that this has probably been addressed but I'm trying to figure 
> out the differences in the specs for replacing metal when putting in 
> the 'nozzle' known as the conning tower.  I remember the RFC about the 
> 100% rule but wasn't familiar enough with the different rules and 
> theories to put in my $.02...  Is there a 'cliff notes' that explains 
> the differences between the disparity with ABS vs. 100%?
> Seperate topic:  I'm starting to design my ballast system and was 
> wondering about the advantages of using flexible hose vs. ss tube.  
> Has anyone used hydraulic system hoses and valves for their ballast?  
> Should you use them?
> Lastly, and most humerously...  Those with K-boats or a similar sized 
> sub that you homebuilt:  What did you use for your main hull?  used 
> propane tank, had it fabricated...?  I know that Cliff's R-300 was 
> scratch built...I also know he has a PhD, whereas I only have an AS 
> (read: not very experienced in mechanical fabrication...).
> Thanks,
> Ben Fritz



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