[PSUBS-MAILIST] Decision time.

[emile via Personal_Submersibles]

Hi James,

 

Think you are on the right way.

In order to reach some 5 knots, I would add a bow and stern fairing on the waterline (Drebbel style?)

Increases the waterline length and give better directional stability. Euronaut and Drebbel run much metter on the surface when some 2-3 deg. stern heavy 

Otherwise it will go nose down and dive under high power…

 

Both direct drive or generator/ thruster are a good option. 

If I build the generator version, I would buy a 24-48 VDC genset . If not available build it from a  5-8 Kw Diesel engine with 1 or 2 big (100-200 Amp)  24VDC truck dynamo’s.

Pod motor of some 4-5 Kw.  I have a steerable rimdrive astern; turns good with only a 35 deg. Angle.  Now 60 Kg thrust at 24 VDC but could be over 100 Kg at 48VDC.(8 KW)

 

Br. Emile

 

Van: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] Namens James Frankland via Personal_Submersibles
Verzonden: maandag 16 april 2018 12:40
Aan: Personal Submersibles General Discussion
Onderwerp: [PSUBS-MAILIST] Decision time.

 

 Hi All,

 

I need to make a decision how I am going to do the new sub.  I'm really not sure quite how to do this, so open to thoughts\suggestions.  :)

 

I have cleared the boat out and its completely stripped.  All penetrators etc are removed or loose.  Viewports were a real swine to get out, but they are all done with no damage.

 

The primary design objectives are:

 

1. Diesel power for longer surface running.

2. Powerful surface motor.

3. Enclosed tanks for open sea running.

4. Ability to get out on surface and walk around on the deck.

 

I was initially thinking that I would fit a diesel engine inboard.  However, I am now leaning a different way.

 

I am thinking I should put a powerful electric motor in a pod at the rear, as a live rudder.  Kittredge style.  It would be able to rotate from rear full 90 degrees left and right, to act as a stern thruster as well.

Motor to have pressure proof housing.  Not compensated.

 

Diesel generator mounted internally instead of a direct drive.

 

Kittredge style battery pods.  Slightly bigger.  More batteries, deeper rating.

 

Drebbel style main tanks.

 

Any thoughts before I commit?   

 

Many thanks

James

 




​
​

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180416/a573b4a3/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 27985 bytes
Desc: not available
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180416/a573b4a3/attachment-0002.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.jpg
Type: image/jpeg
Size: 30103 bytes
Desc: not available
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180416/a573b4a3/attachment-0003.jpg>